Rock drilling arrangement, rock drilling rig and drilling method

Abstract

A rock drilling arrangement, rock drilling rig and drilling method is provided. The rock drilling arrangement includes a drilling boom, which is mountable to a carrier of the rock drilling rig. The boom is provided with two rock drilling units arranged movably in the longitudinal direction of the boom. Further, the drilling units may be moved independently relative to each other.

Claims

1. A rock drilling arrangement comprising: a drilling boom; and two rock drilling units supported movably on the boom, each of the rock drilling units being mounted on a carriage, wherein the carriages are each movable independently relative to the boom, wherein between each of the carriages and the rock drilling units are located separate rotation units arranged for turning the rock drilling units independently relative to the boom, and wherein the carriages are configured to be moved in a longitudinal direction of the boom, and rotation axes of the rotation units are perpendicular relative to the movement direction of the carriages.

2. The rock drilling arrangement as claimed in claim 1, wherein both rock drilling units have a moving range in the longitudinal direction of the drilling boom, the rock drilling units being independently movable in the longitudinal direction of the drilling boom for the full moving range all of the time.

3. The rock drilling arrangement as claimed in claim 1, wherein at least one of the two rock drilling units includes a feed means arranged for feeding reinforcing components to a drill hole drilled by a rock drilling machine of the rock drilling unit.

4. The rock drilling arrangement as claimed in claim 1, wherein the boom includes a first boom part connectable to a movable carrier of a rock drilling rig, and a distal second boom part, wherein between the boom parts is a joint arranged to permit the distal second boom part to be turned relative to the first boom part, and wherein the rock drilling units are mounted on opposing side surfaces of the second boom part and are movable in a longitudinal direction of the second boom part.

5. The rock drilling arrangement as claimed in claim 1, wherein the boom includes a first boom part connectable to a carrier of a rock drilling rig and a distal second boom part, and wherein the boom is configured to be orientated during the operation so that the second boom part is orientated transversally relative to the first boom part.

6. The rock drilling arrangement as claimed in claim 1, wherein the boom includes a first boom part connectable to a carrier of a rock drilling rig, and a distal second boom part and wherein the second boom part comprises: a frame; at least one first elongated guide element supported by the frame; at least one second elongated guide element supported by the frame; a first one of the carriages being supported linearly movably on the first guide element; a second one of the carriages being supported linearly movably on the second guide element; at least one first actuator arranged to move the first one of the carriages relative to the frame; and at least one second actuator arranged to move the second one of the carriages relative to the frame.

7. A rock drilling rig comprising: a movable carrier; and a drilling boom and two rock drilling units according to claim 1, wherein the two rock drilling units are supported on the drilling boom.

8. A method of drilling drill holes to a rock surface by a rock drilling arrangement including a drilling boom and two rock drilling units supported on the drilling boom, and wherein the two rock drilling units are separately moved relative to the drilling boom, the method including the steps of: positioning at least part of the drilling boom vertically; moving the two rock drilling units vertically relative to the drilling boom for positioning them in desired vertical positions; moving two rock drilling units in a longitudinal direction of the drilling boom; and executing the movements of the two rock drilling units independently relative to each other.

9. The method as claimed in claim 8, wherein the drilling units are arranged to execute movements in a full linear movement range at all times during the drilling.

10. The method as claimed in claim 8, wherein one of the drilling units is arranged to move freely in the longitudinal direction of the drilling boom simultaneously whilst the other drilling unit executes a drilling work cycle.

Description

BRIEF DESCRIPTION OF THE FIGURES

(1) Some embodiments are described in more detail in the accompanying drawings, in which

(2) FIG. 1 is a schematic side view of a rock drilling rig provided with a drilling boom with tandem drilling units.

(3) FIG. 2 is a schematic diagram showing possible components of the disclosed arrangement.

(4) FIG. 3 is a schematic side view of an arrangement having a boom part provided with two longitudinally movable drilling units.

(5) FIG. 4 is a schematic top view of the arrangement of FIG. 3.

(6) FIGS. 5 and 6 are schematic side views showing the solution of the arrangement of FIGS. 3 and 4 at different position and orientation situations.

(7) For the sake of clarity, the figures show some embodiments of the disclosed solution in a simplified manner. In the figures, like reference numerals identify like elements.

DETAILED DESCRIPTION

(8) FIG. 1 shows a rock drilling rig 1. The rock drilling rig 1 includes a movable carrier 2 and one drilling boom 3. The boom 3 includes a first boom part 3a connected to the carrier 2 and a second boom part 3b connected to the first boom part 3a by a joint 4, whereby the second boom part 3b may be turned in direction A to a desired position. The first boom part 3a may be turned as shown by direction B relative to a joint 5.

(9) During operation, the first boom part 3a may be horizontally orientated and may be supported on the ground or bottom surface. The second boom part 3b can be vertically orientated and includes two drilling units 6a, 6b. The second boom part 3b is provided with guide surfaces 7 along which the drilling units 6a, 6b may be moved as shown by P longitudinally on opposite sides of the second boom part 3b. The drilling units 6a, 6b have movement ranges M and both can be freely positioned to any desired position, as it is demonstrated by broken lines. The drilling units 6a, 6b may be turned in direction T relative to transverse turning axis 8. The disclosed rock drilling rig 1 may be utilized for drilling drill holes 9 to rock surfaces locating above, laterally and in angular positions, and directions of the drilled holes 9 may vary.

(10) Further, in some cases, the entire boom system may be moved laterally relative to a turning axis 10 in order to facilitate positioning. The positioning and drilling process may be controlled automatically under control of a control unit CU or in a computer aided manner together with an operator. The control unit CU may be provided with a drilling or bolting plan and the drill holes 9 are drilled to planned positions and directions.

(11) FIG. 2 discloses that both drilling units 6a, 6b may include a feed beam 11 and a rock drilling machine 12 supported thereon. The rock drilling machine 12 may include an impact device for generating impact pulses to a drilling tool, and a rotating device for rotating the tool around its longitudinal axis. The rock drilling machine 12 may further include a flushing device for flushing drilling cuttings away from the drilled hole. When the drilling units 6a, 6b are intended for reinforcing the rock surface, they may be provided with feed means 13 for feeding reinforcements to the drilled drill holes. The feed means 13 may include a feed storage, such as a rock bolt magazine, and feed manipulator.

(12) FIG. 3 discloses a rock drilling arrangement 14 including two rock drilling units 6a, 6b mounted on carriages 15a, 15b, which are movable along direction P independently relative to a second boom part 3b. A first carriage 15a is supported on two first guide bars 16a, 16b and a second carriage 15b is supported on two second guide bars 17a, 17b. The carriages 15a, 15b may be provided with slide bearing elements 18 or other bearing arrangements. The guide bars 16a, 16b may be round bars or tubes arranged between two transverse frame parts 19. Thus, in the shown embodiment, a frame 20 of the second boom part 3b includes only the guide bars 16, 17 in the longitudinal direction. However, in some cases there may be separate longitudinal beams between outer ends of the transverse beams and these bars are not serving as guide bars.

(13) The guide bars 16, 17 serve as the elongated guide elements 7 mentioned above in connection with FIG. 1. A first actuator 22a moves the first carriage 15a and a second actuator 22b moves the second carriage 15b. The actuators 22 may be hydraulic cylinders. Further, between the carriages 15 and the rock drilling units 6 are rotation units 23 for turning along T the drilling units 6 to different angular positions. The drilling units 6 include feed beams 11 and rock drilling machines 12 with drilling tools 24. FIG. 4 is a top view of the same apparatus 14.

(14) FIGS. 5 and 6 disclose the apparatus 14 of FIGS. 3 and 4 in different operational positions. In FIG. 5 the second drilling unit 6b is driven to its lower position and the first drilling unit 6a is at its upper position. In FIG. 6 the situation is vice versa. It is also possible that both drilling units 6 are at their upper or lower position, or at any vertical position within the movement range. FIGS. 5 and 6 also show that the drilling units 6 may be orientated in a desired manner.

(15) Although the present embodiment(s) has been described in relation to particular aspects thereof, many other variations and modifications and other uses will become apparent to those skilled in the art. It is preferred therefore, that the present embodiment(s) be limited not by the specific disclosure herein, but only by the appended claims.