Method for mounting a roll of protective mesh material to an underground rock drilling machine, a method for attaching protective mesh material to a rock surface and a mounting device

Abstract

A method for mounting a roll of protective mesh material to an underground rock drilling machine comprising at least one drilling boom. The method comprises at least the following steps: inserting a first end of a first bar from a first lateral side of the roll of protective mesh material into a center of the roll of protective mesh material, fastening the first bar directly or indirectly to the drilling boom, inserting a first end of a second bar from a second lateral side of the roll of protective mesh material opposite the first lateral side into the center of the roll of protective mesh material, fastening the second bar directly or indirectly to the drilling boom in a location that is spaced apart from the first bar, securing the roll of protective mesh material against autonomous unrolling.

Claims

1. A method for mounting a roll of protective mesh material to an underground rock drilling machine comprising at least one drilling boom, the method including at least the following steps: inserting a first end of a first bar from a first lateral side of the roll of protective mesh material into a center of the roll of protective mesh material; fastening the first bar directly or indirectly to the drilling boom; inserting a first end of a second bar from a second lateral side of the roll of protective mesh material opposite the first lateral side into the center of the roll of protective mesh material; fastening the second bar directly or indirectly to the drilling boom in a location that is spaced apart from the first bar; and securing the roll of protective mesh material against autonomous unrolling, wherein for securing the roll of protective mesh material against autonomous unrolling, the roll of protective mesh material is tensioned by applying a pressure to at least one of the lateral sides of the roll of protective mesh material or wherein in order to secure the roll of protective mesh material against autonomous unrolling, the roll of protective mesh material mounted to the drilling boom is tilted in such a way that the protective mesh material of the roll of protective mesh material rests on a left side of the drilling boom or on a right side of the drilling boom, wherein the roll of protective mesh material is secured against autonomous unrolling by a movement mechanism of the underground rock drilling machine, which is normally applied for moving a drill, and wherein the movement mechanism is used for moving and/or pressing the first bar and the second bar towards each other.

2. The method according to claim 1, wherein, in order to secure the roll of protective mesh material by tensioning the roll of protective mesh material, the movement mechanism is actuated in a direction that is at least substantially parallel to an unrolling axis of the roll of protective mesh material.

3. The method according to claim 1, wherein the roll of protective mesh material is secured by applying a feed pressure of a feed of a drifter drill of the underground rock drilling machine to tension the roll of protective mesh material.

4. The method according to claim 1, wherein, when the drilling boom is lifted and not tilted, the roll of protective mesh material which is mounted to the drilling boom by the first bar and by the second bar is suspended on the left side of the drilling boom or on the right side of the drilling boom.

5. The method according to claim 1, wherein in order to secure the roll of protective mesh material against autonomous unrolling, the roll of protective mesh material mounted to the drilling boom is tilted in such a way that the protective mesh material of the roll of protective mesh material rests on a left side of the drilling boom or on a right side of the drilling boom.

6. A method for attaching protective mesh material to a rock surface, in which the protective mesh material is mounted to a first drilling boom of an underground rock drilling machine according to the mounting method of claim 1, wherein in a method step, the first drilling boom with the rolled-up protective mesh material is moved towards the rock surface and is at least substantially aligned with the rock surface, wherein in a further method step a freely suspended end of the protective mesh material is pinned to the rock surface by a pinning device of a second boom of the underground rock drilling machine, wherein in another further method step the protective mesh material is unrolled by moving the first drilling boom along the rock surface in an unrolling direction at least substantially perpendicularly to an unrolling axis of the rolled-up protective mesh material, and wherein in an additional further method step, the pinning device attaches the unrolled protective mesh material to the rock surface at specific distances along the unrolling direction.

7. The method according to claim 6, wherein the protective mesh material is additionally anchored to the rock surface by cohesively joining anchors using the pinning device of the second boom.

8. A mounting device, which is configured to mount a roll of protective mesh material to a drilling boom of an underground rock drilling machine according to the method of claim 1, with at least a first bar and a second bar, wherein each bar comprises a section that is adapted to be inserted into a center of the roll of protective mesh material and to bear a weight of at least 100 kg when the bars are used to lift the roll of protective mesh material.

9. The mounting device according to claim 8, wherein at least one of the bars comprises at least one bend of at least 60°.

10. The mounting device according to claim 9, wherein at least the second bar comprises a fastening unit, which is adapted to captively mount the second bar to the drilling boom via a centralizer of the drilling boom.

11. The mounting device according to claim 8, wherein at least the second bar comprises a total bending of more than 90°.

12. The mounting device according to claim 11, wherein at least the second bar comprises a second end that extends at least substantially parallel to the section of the second bar which is adapted to be inserted into a center of the roll of protective mesh material.

13. The mounting device according to claim 12, wherein the second end of at least the second bar and the section of the second bar which is adapted to be inserted into a center of the roll of protective mesh material point into at least substantially identical directions.

14. The mounting device according to claim 8, wherein at least the first bar has an L-shape.

15. The mounting device according to claim 8, wherein at least the first bar comprises a fastening unit, which is adapted to mount the first bar to a shank of the drilling boom by at least partially encompassing the shank.

16. The mounting device according to claim 8, wherein the sections of the bars which are configured to be inserted into the center of the roll of protective mesh material have a total length of less than 40% of a maximal extension of the roll of protective mesh material, parallel to an unrolling axis of the roll of protective mesh material.

17. The mounting device according to claim 8, further comprising a third bar, which has an at least approximately straight shape and which is configured to be inserted into the center of the roll of protective mesh material in between the at least two bars.

18. A mounting device, which is configured to mount a roll of protective mesh material to a drilling boom of an underground rock drilling machine according to a method including at least the following steps: inserting a first end of a first bar from a first lateral side of the roll of protective mesh material into a center of the roll of protective mesh material; fastening the first bar directly or indirectly to the drilling boom; inserting a first end of a second bar from a second lateral side of the roll of protective mesh material opposite the first lateral side into the center of the roll of protective mesh material; fastening the second bar directly or indirectly to the drilling boom in a location that is spaced apart from the first bar; and securing the roll of protective mesh material against autonomous unrolling, wherein for securing the roll of protective mesh material against autonomous unrolling, the roll of protective mesh material is tensioned by applying a pressure to at least one of the lateral sides of the roll of protective mesh material or wherein in order to secure the roll of protective mesh material against autonomous unrolling, the roll of protective mesh material mounted to the drilling boom is tilted in such a way that the protective mesh material of the roll of protective mesh material rests on a left side of the drilling boom or on a right side of the drilling boom; wherein the mounting device has at least a first bar and a second bar, wherein each bar comprises a section that is adapted to be inserted into a center of the roll of protective mesh material and to bear a weight of at least 100 kg when the bars are used to lift the roll of protective mesh material, and wherein at least the first bar comprises a fastening unit, which is adapted to mount the first bar to a shank of the drilling boom by at least partially encompassing the shank.

Description

DRAWINGS

(1) Further advantages will become apparent from the following description of the drawings. In the drawings, one exemplary embodiment of the invention is depicted. The drawings, the description and the claims contain a plurality of features in combination. Someone skilled in the art will purposefully also consider the features separately and will find further expedient combinations.

(2) It is shown in:

(3) FIG. 1 a schematic side view of an underground rock drilling machine with two booms,

(4) FIG. 2 a schematic perspective view of a roll of protective mesh material,

(5) FIG. 3 a schematic perspective view of a mounting device, comprising three bars,

(6) FIG. 4 a part of a schematic perspective view of the boom with the mounting device attached to a shank of the boom,

(7) FIG. 5 another part of another schematic perspective view of the boom with the mounting device attached to a centralizer of the boom,

(8) FIG. 6 another part of another schematic perspective view of the boom with the mounting device attached to the centralizer of the boom,

(9) FIG. 7 a process chart of a method for mounting the roll of protective mesh material to the underground rock drilling machine,

(10) FIG. 8 the booms of the underground rock drilling machine during an installation procedure of the protective mesh material to a rock surface and

(11) FIG. 9 a process chart of a method for attaching the protective mesh material to the rock surface.

DESCRIPTION OF THE EXEMPLARY EMBODIMENT

(12) FIG. 1 shows a schematic drawing of an underground rock drilling machine 12. The underground rock drilling machine 12 is implemented as a drilling jumbo. The drilling jumbo, which is depicted schematically in FIG. 1 belongs to the state of the art. The underground rock drilling machine 12 is at least configured to drill holes into rock surfaces 52 for example in order to apply blasting charges 86 or in order to install rock anchors 88. The underground rock drilling machine 12 comprises a chassis frame 104. The underground rock drilling machine 12 is navigable along a tunnel floor 100. The underground rock drilling machine 12 comprises a control stand 102. The underground rock drilling machine 12 comprises a first boom 14. The underground rock drilling machine 12 comprises a second boom 16. The booms 14, 16 are implemented as drilling booms. Via the control stand 102 operating personnel is able to control the underground rock drilling machine. For example, via the control stand 102, the operating personnel is able to control the spatial positions of the booms 14, 16 and/or the underground rock drilling machine 12, in particular remotely. The booms 14, 16 comprise arms 124. The booms 14, 16, in particular the arms 124, are pivotable about at least a first pivot axis 90. The first pivot axis 90 extends at least substantially vertically. The booms 14, 16, in particular the arms 124, are pivotable about at least a second pivot axis 92. The second pivot axis 92 extends at least substantially perpendicularly to the first pivot axis 90. The expression “substantially vertically” here, in particular, is to define an alignment of a direction relative to a vertical direction, the direction and the vertical direction, in particular when viewed in one plane, enclosing an angle of 90° and the angle comprising a maximum deviation of, in particular, less than 8°, in an advantageous manner less than 5° and in an especially advantageous manner less than 2°. The expression “substantially perpendicularly” here, in particular, is to define an alignment of a direction relative to a reference direction, the direction and the reference direction, in particular when viewed in one plane, enclosing an angle of 90° and the angle comprising a maximum deviation of, in particular, less than 8°, in an advantageous manner less than 5° and in an especially advantageous manner less than 2°.

(13) The booms 14, 16 comprise drilling equipment 96. The drilling equipment 96 comprises a drifter drill 38. The drilling equipment 96 comprises a drill 108. The drill 108 comprises a drill rod 110. The drill 108 comprises a drill bit 112. The drill bit 112 is connected to the drill rod 110. The drill bit 112 is configured to cut into the rock surface 52, when rotated. The drilling equipment 96 comprises a drill drive 114. The drill drive 114 is configured to drive a rotation of the drill 108. The boom 14, 16, in particular the drilling equipment 96, comprises a shank 46. The shank 46 is configured to hold the drill rod 108. The boom 14, 16, in particular the drilling equipment 96, comprises a centralizer 50. The centralizer 50 is configured to centralize the drill 108, in particular the drill rod 110 during a drill operation. The centralizer 50 is arranged close to end of the boom 14, 16, in particular the drilling equipment 96. The drilling equipment 96 comprises a further centralizer 94. The further centralizer 94 is spaced apart from the centralizer 50. The further centralizer 94 is arranged close to the middle of the boom 14, 16, in particular the drilling equipment 96. The boom 14, 16, in particular the drilling equipment 96, comprises a feed 36. The underground rock drilling machine 12 comprises a movement mechanism 32. The movement mechanism 32 is normally used for moving the drill 108. The movement mechanism 32 is configured to at least move the drill 108 along a main extension direction 116 of the boom 14, 16. The feed 36 provides the movement mechanism 32 and/or an actuation unit 48 of the underground rock drilling machine 12. The feed 36 comprises a feed rail 98. The feed 36 comprises a feed drive 106. The feed drive 106 is configured to actuate the drill 108 at least along a direction parallel to the main extension direction 116 of the boom 14, 16. The feed drive 106 is configured to actuate the shank 46 at least along a direction parallel to the main extension direction 116 of the boom 14, 16. The feed drive 106 is powered hydraulically.

(14) The drilling equipment 96 is pivotable relative to the arm 124 of the respective boom 14, 16. The drilling equipment 96 including the feed 36, the centralizer 50 and the shank 46 are pivotable relative to the arm 124 of the respective boom 14, 16. The drilling equipment 96, the feed 36, the centralizer 50 and/or the shank 46 are pivotable about a third pivot axis 118. The third pivot axis 118 is arranged at least substantially perpendicularly with respect to a main extension direction 126 of the feed rail 98 and the extension of which is intersecting the arm 124. The drilling equipment 96, the feed 36, the centralizer 50 and/or the shank 46 are pivotable about a fourth pivot axis 120. The fourth pivot axis 120 is arranged at least substantially parallel with respect to a main extension direction 128 of the arm 124. The drilling equipment 96, the feed 36, the centralizer 50 and/or the shank 46 are pivotable about a fifth pivot axis 122. The fifth pivot axis 122 is arranged at least substantially perpendicularly with respect to a main the third pivot axis 118 and at least substantially perpendicularly with respect to the main extension direction 126 of the feed rail 98.

(15) FIG. 2 shows a schematic drawing of a roll of protective mesh material 10. The roll of protective mesh material 10 comprises protective mesh material 44 in a rolled-up form. The protective mesh material 44 is implemented as a wire netting. Preferably, the wire netting is made from high-tensile steel with a wire thickness of 4.6 mm. Preferably, the wire netting has diamond shaped meshes. Preferably, the wire netting consists of interconnected wires, which are shaped as flat helices. The roll of protective mesh material 10 and the protective mesh material have a width of 2.5 m. When unrolled, the protective mesh material 44 has a length of 15 m. The protective mesh material 44 of the roll of protective mesh material 10 is wound around a center 24 of the roll of protective mesh material 10. The center 24 comprises a hollow pipe 142. The protective mesh material 44 is wound around the hollow pipe 142. The roll of protective mesh material 10 has a first lateral side 22 and a second lateral side 30. The roll of protective mesh material 10 can be unrolled and/or rolled up when rotated about an unrolling axis 34 of the roll of protective mesh material 10. The unrolling axis extends between the lateral sides 22, 30 in the center 24 of the roll of protective mesh material 10. The roll of protective mesh material has a maximal extension 82, which extends between the lateral sides 22, 30 of the roll of protective mesh material 10.

(16) FIG. 3 shows a mounting device. The mounting device is configured to mount a roll of protective mesh material 10 (see for example FIG. 3) to at least one of the booms 14, 16. The mounting device comprises a first bar 20. The first bar 20 comprises a section 72 that is adapted to be inserted into the center 24 of the roll of protective mesh material 10. The first bar 20 comprises a first end 18, which is configured to be inserted into the roll of protective mesh material 10. The first bar 20 comprises a second end 144, which is configured to provide fastening means 146 for fastening the first bar 20 to the boom 14, 16. The first bar 20 is made of metal, in particular (high-tensile) steel or aluminum. The first bar 20 weighs less than 30 kg.

(17) The mounting device comprises a second bar 28. The second bar 28 comprises a section 74 that is adapted to be inserted into the center 24 of the roll of protective mesh material 10. The second bar 28 comprises a first end 26, which is adapted to be inserted into the center 24 of the roll of protective mesh material 10. The second bar 28 comprises a second end 154, which is configured to provide fastening means 146 for fastening the second bar 28 to the boom. The second bar 28 is made of metal, in particular (high-tensile) steel or aluminum. The second bar 28 weighs less than 30 kg. The first bar 20 and the second bar 28 are adapted to bear a weight of at least 100 kg when the bars 20, 28 are used to lift the roll of protective mesh material 10.

(18) The first bar 20 comprises one bend 130 of more than 60°. The first bar 20 comprises one bend 130 of approximately 90°. A radius of curvature 136 of the bend 130 of the first bar 20 is approximately twice a diameter 138 of the first bar 20 in a bending region 140 of the bend 130 of the first bar 20. The first bar 20 has an L-shape. The section 72 of the first bar 20 has a total length of less than 40% of the maximal extension 82 of the roll of protective mesh material 10 parallel to the unrolling axis 34 of the roll of protective mesh material 10. The section 72 of the first bar 20 extends between the bend 130 of the first bar 20 and the first end 18 of the first bar 20. The first bar 20 comprises a fastening unit 80. The fastening unit 80 is adapted to mount the first bar 20 to the shank 46 of the boom 14, 16. The fastening unit 80 is adapted to encompass the shank 46, when mounted to the shank (see also FIG. 3). When mounted to the boom 14, 16, the fastening unit 80 of the first bar 20 is fed over the shank and then secured in this position by a coupler 152. The coupler 152 is implemented as a nut. The coupler 152 is screwed onto the shank. The fastening unit 80 of the first bar 20 in a mounted state is sandwiched between the coupler 152 and the feed drive 106 of the boom 14, 16. The fastening unit 80 of the first bar 20 is arranged at the second end 144 of the first bar 20.

(19) The second bar 28 comprises two bends 132, 134 of more than 60°. The second bar 28 comprises a total bending of more than 90°. The second bar 28 comprises a total bending of about 180°. The second bar comprises two bends 132, 134, each of approximately 90°. Radii of curvature 156, 158 of the bends 132, 134 of the second bar 28 are approximately identical and approximately twice a diameter 148 of the second bar 28 in a bending region 150 of the bend 132 of the second bar 28, which is closer to the first end 26 of the second bar 28. The second bar 28 has a double-L-shape. The section 74 of the second bar 28 has a total length of less than 40% of the maximal extension 82 of the roll of protective mesh material 10 parallel to the unrolling axis 34 of the roll of protective mesh material 10. The section 74 of the second bar 28 extends between the bend 132 of the second bar 28, which is closer to the first end 26 of the second bar 28 and the first end 26 of the second bar 28. In a region around the second end 154 of the second bar 28, the second bar 28 extends parallel to the section 74 of the second bar 28 which is adapted to be inserted into the center 24 of the roll of protective mesh material 10. The second end 154 of the second bar 28 and the section 74 of the second bar 28, which is adapted to be inserted into the center 24 of the roll of protective mesh material 10 point into at least substantially identical directions. The second bar 28 comprises a fastening unit 76. The fastening unit 76 of the second bar 28 is adapted to captively mount the second bar 28 to the boom 14, 16. The fastening unit 76 of the second bar 28 is adapted to mount the second bar 28 to the boom 14, 16 via the centralizer 50 of the boom 14, 16 (cf. FIG. 5). In order to mount the second bar 28 to the boom 14, 16, the second end 154 of the second bar 28 is guided through the centralizer 50 of the boom. When mounted to the boom 14, 16, a mounted position of the second bar 28 is secured by securing means 160 (cf. FIG. 5 or 6). The securing means 160 is implemented as a securing pin, which is adapted to be fed through a feed through element 78 of the second bar 28, which is arranged close to the second end 154 of the second bar 28. The second bar 28 comprises the feed through element 78. The feed trough element 78 is implemented as a hole, which extends centrally and perpendicularly with respect to a main extension direction 176 of the second end 154 of the second bar 28 through the second bar 28.

(20) The mounting device comprises a third bar 84. The third bar 84 has an at least approximately straight shape. The third bar is configured to be inserted into the center 24 of the roll of protective mesh material 10 in between the first end 18 of the first bar 20 and the first end 26 of the second bar 28. The third bar 84 is configured to provide a stabilization of a middle region of the roll of protective mesh material 10, when lifted upwards by the boom 14, 16. The third bar 84 is configured to prevent a sagging of the roll of protective mesh material 10, when lifted upwards by the boom 14, 16. The third bar 84 is made of metal, in particular (high-tensile) steel or aluminum. The third bar 84 weighs less than 30 kg.

(21) FIG. 7 shows a schematic process chart of a method for mounting the roll of protective mesh material 10 to the underground rock drilling machine 12. In at least one method step 162 the first end 18 of the first bar 20 is inserted into the center 24 of the roll of protective mesh material 10 from the first lateral side 22 of the roll of protective mesh material 10 (cf. also FIG. 4). In at least one further method step 164, the first bar 20 is fastened to the boom 14, 16. In the method step 164, the first bar 20 is fastened to the shank 46 of the boom 14, 16 (cf. also FIG. 4). For fastening the first bar 20 to the boom 14, 16, the fastening unit 80 of the first bar is guided over the shank 46 and then secured to the shank 46 by the coupler 152. The fastening unit 80 is configured to secure a position of the first bar 20 and hence of the roll of protective mesh material 10 in a direction parallel to the main extension direction 116 of the boom 14, 16. The fastening unit 80 of the first bar 20 allows a rotation of the first bar 20 about a longitudinal axis 172 of the shank 46 (cf. FIG. 4).

(22) In at least one further method step 180, the third bar 84 is inserted into the center 24 of the roll of protective mesh material 10 from the second lateral side 30 of the roll of protective mesh material 10, which is opposite to the first lateral side 22 of the roll of protective mesh material 10. The third bar 84 is inserted completely into the center 24 of the roll of protective mesh material 10.

(23) In at least one further method step 166, the first end 26 of the second bar 28 is inserted into the center 24 of the roll of protective mesh material 10 from the second lateral side 30 of the roll of protective mesh material 10, which is opposite to the first lateral side 22 of the roll of protective mesh material 10. The first end 26 of the second bar 28 is inserted into the center 24 of the roll of protective mesh material 10 along an insertion direction 174 (cf. FIG. 5). In at least one further method step 168, the second bar 28 is fastened to the boom 14, 16. The second bar 28 is fastened to the boom in a location that is spaced apart from a fastening point of the first bar 20. The two bars 20, 28 are fastened to the boom 14, 16 at opposite ends of the boom 14, 16 along the main extension direction 116 of the boom 14, 16. In the method step 168, the second bar 28 is fastened to the centralizer 50 of the boom 14, 16. For fastening the second bar 28 to the boom 14, 16, the second end 154 of the second bar 28 is fed through a centralizer opening 70 of the centralizer 50. The centralizer 50 comprises the centralizer opening 70. The position of the second bar 28 is then secured by the securing means 160. The fastening unit 76 of the second bar 28 is configured to secure a position of the second bar 28 and hence of the roll of protective mesh material 10 in a direction parallel to the main extension direction 116 of the boom 14, 16. The fastening unit 76 of the second bar 28 allows a rotation of the second bar 28 about a longitudinal axis 178 of the centralizer opening 70 (cf. FIG. 5).

(24) In at least one further method step 188, the boom 14, 16 is lifted and not tilted. In the method step 188, after lifting the boom 14, 16, the roll of protective mesh material 10, which is mounted to the boom 14, 16 by the first bar 20 and by the second bar 28 is suspended on a left side 40 of the boom 14, 16 or on a right side 42 of the boom 14, 16.

(25) In at least one further method step 170, the roll of protective mesh material 10 is secured against autonomous unrolling. In at least one substep 182 of the method step 170, the roll of protective mesh material 10 is tensioned by applying a pressure to at least one of the lateral sides 22, 30 of the roll of protective mesh material 10 in order to secure the roll of protective mesh material 10 against autonomous unrolling. In the substep 182, the roll of protective mesh material 10 is secured against autonomous unrolling by an application of the movement mechanism 32 of the underground rock drilling machine 12. In the substep 182, the movement mechanism 32 is actuated in a direction that is parallel to the unrolling axis 34 of the roll of protective mesh material 10, in order to tension the roll of protective mesh material 10, yielding the securing against autonomous unrolling. In the substep 182, the roll of protective mesh material 10 is then secured by applying a hydraulic feed pressure of the feed 36 of the drifter drill 38 of the underground rock drilling machine 12, which leads to the tensioning the roll of protective mesh material 10. Therefore, the movement mechanism 32, in particular the feed 36 of the drifter drill 38, is used for moving and/or for pressing the first bar 20 and the second bar 28 towards each other. Consequently, the roll of protective mesh material 10 is slightly jammed between the first bar 20 and the second bar 28.

(26) In at least one further substep 184 of the method step 170, the roll of protective mesh material 10, which is mounted to the boom 14, 16 is tilted in such a way that the protective mesh material 44 of the roll of protective mesh material 10 rests on the left side 40 of the boom in order to secure the roll of protective mesh material 10 against autonomous unrolling. Alternatively, in at least one further substep 186 of the method step 170, the roll of protective mesh material 10, which is mounted to the boom 14, 16 is tilted in such a way that the protective mesh material 44 of the roll of protective mesh material 10 rests on the right side 42 of the boom 14, 16 (cf. also FIG. 8) in order to secure the roll of protective mesh material 10 against autonomous unrolling. In at least one further method step 190, the roll of protective mesh material 10 is brought into an installation position by actuating the boom 14, 16 the roll of protective mesh material 10 is attached to.

(27) FIG. 9 shows a schematic process chart of a method for attaching the protective mesh material 10 to the rock surface 52, in which method the protective mesh material 10 is mounted to a first boom 14 of the underground rock drilling machine 12 according to a method comprising at least part of the method steps 162, 164, 166, 168, 170, 180, 188, 190 shown in FIG. 7. In at least one method step 54, the first boom 14 with the rolled-up protective mesh material 44 attached, is moved towards the rock surface 52. In the method step 54, the first boom 14 is aligned with the rock surface 52. In at least one further method step 192, a freely suspended end 58 of the roll of protective mesh material is guided around the roll of protective mesh material 10 and over the tilted first boom 14 (cf. FIG. 8). In at least one further method step 56 the freely suspended end 58 of the protective mesh material 10 is pinned to the rock surface 52 by a pinning device 60 of the second boom 16 of the underground rock drilling machine 12. The drilling equipment 96, in particular the drifter drill 38, is provided as the pinning device 60. In at least another further method step 62, the protective mesh material 44 is unrolled by moving the first boom 14 along the rock surface 52 in an unrolling direction 64, which is arranged perpendicularly to the unrolling axis 34 of the roll of protective mesh material 10, in particular the rolled-up protective mesh material 44. In at least one additional further method step 66, the pinning device 60 attaches the unrolled protective mesh material 44 to the rock surface 52 at specific distances along the unrolling direction 64. Typically, around ten pins, in particular ten rock anchors 88, are used for a 15 m sheet of protective mesh material 44. In at least one further method step 194, the protective mesh material 44 is additionally anchored to the rock surface 52 by cohesively joining anchors 68 using the pinning device 60 of the second boom 16. The cohesively joining anchors 68 are implemented as resin bolts. For the installation of a resin bolt, first a hole 198 is drilled using the second boom 16, then resin packages 196 are inserted into the hole 198 and then a metal rock anchor 88 is inserted into the hole 198 filled with resin packages 196, which subsequently are ripped open and cause a cohesive bond between the rock anchor 88 and surrounding rock 200 (cf. also FIG. 1).

REFERENCE NUMERALS

(28) 10 Roll of protective mesh material

(29) 12 Underground rock drilling machine

(30) 14 Boom

(31) 16 Boom

(32) 18 First end

(33) 20 First bar

(34) 22 First lateral side

(35) 24 Center

(36) 26 First end

(37) 28 Second bar

(38) 30 Second lateral side

(39) 32 Movement mechanism

(40) 34 Unrolling axis

(41) 36 Feed

(42) 38 Drifter drill

(43) 40 Left side

(44) 42 Right side

(45) 44 Protective mesh material

(46) 46 Shank

(47) 48 Actuation unit

(48) 50 Centralizer

(49) 52 Rock surface

(50) 54 Method step

(51) 56 Method step

(52) 58 End

(53) 60 Pinning device

(54) 62 Method step

(55) 64 Unrolling direction

(56) 66 Method step

(57) 68 Cohesively joining anchor

(58) 70 Centralizer opening

(59) 72 Section

(60) 74 Section

(61) 76 Fastening unit

(62) 78 Feed through element

(63) 80 Fastening Unit

(64) 82 Maximal Extension

(65) 84 Third bar

(66) 86 Blasting charge

(67) 88 Rock anchor

(68) 90 First pivot axis

(69) 92 Second pivot axis

(70) 94 Further centralizer

(71) 96 Drilling equipment

(72) 98 Feed Rail

(73) 100 Tunnel floor

(74) 102 Control stand

(75) 104 Chassis frame

(76) 106 Feed drive

(77) 108 Drill

(78) 110 Drill rod

(79) 112 Drill bit

(80) 114 Drill drive

(81) 116 Main extension direction

(82) 118 Third pivot axis

(83) 120 Fourth pivot axis

(84) 122 Fifth Pivot axis

(85) 124 Arm

(86) 126 Main extension direction

(87) 128 Main extension direction

(88) 130 Bend

(89) 132 Bend

(90) 134 Bend

(91) 136 Radius of curvature

(92) 138 Diameter

(93) 140 Bending region

(94) 142 Hollow pipe

(95) 144 Second end

(96) 146 Fastening means

(97) 148 Diameter

(98) 150 Bending region

(99) 152 Coupler

(100) 154 Second end

(101) 156 Radius of curvature

(102) 158 Radius of curvature

(103) 160 Securing means

(104) 162 Method step

(105) 164 Method step

(106) 166 Method step

(107) 168 Method step

(108) 170 Method step

(109) 172 Longitudinal axis

(110) 174 Insertion direction

(111) 176 Main extension direction

(112) 178 Longitudinal axis

(113) 180 Method step

(114) 182 Substep

(115) 184 Substep

(116) 186 Substep

(117) 188 Method step

(118) 190 Method step

(119) 192 Method step

(120) 194 Method step

(121) 196 Resin package

(122) 198 Hole

(123) 200 Rock