FULL-FACE SHAFT TUNNEL BORING MACHINE SYSTEM

Abstract

A full-face shaft tunnel boring machine system includes a tunnel boring machine cutterhead device for tunneling downwards in a shaft; a full-hydraulic formwork device for supporting and walling in a wellbore; and an upper muck-discharge system for vertically conveying rock mucks generated by tunneling. The tunnel boring machine cutterhead device comprises a vertical guide frame, a cutter-expanded boring head and an advanced cutterhead that are fixedly connected in a vertical order from top to bottom so as to form an integrated structure. The vertical guide frame is a hollow cylindrical structure and driven to rotate around an axis of the vertical guide frame by a power mechanism, and an outer wall of the vertical guide frame is provided with multiple sets of first guide rollers.

Claims

1. A full-face shaft tunnel boring machine system, comprising: a tunnel boring machine cutterhead device for tunneling downwards in a shaft; a full-hydraulic formwork device for supporting and walling in a wellbore; and an upper muck-discharge system for vertically conveying rock mucks generated by tunneling; wherein the tunnel boring machine cutterhead device comprises a vertical guide frame, a cutter-expanded boring head and an advanced cutterhead that are fixedly connected in a vertical order from top to bottom so as to form an integrated structure; the vertical guide frame is a hollow cylindrical structure and driven to rotate around a axis of the vertical guide frame by a power mechanism, and an outer wall of the vertical guide frame is provided with multiple sets of first guide rollers; the cutter-expanded boring head is a hollow cone-shaped structure, and an outer wall of the cutter-expanded boring head is provided with multiple sets of first hobbing cutters and first shovel blades, first muck outlets and water holes; the advanced cutterhead is a hollow cylindrical structure, a circumferential surface of an outer wall of the advanced cutterhead is provided with multiple sets of second guide rollers, and a bottom of the advanced cutterhead is provided with multiple sets of second hobbing cutters and second shovel blades, second muck outlets and water holes; a primary muck-discharge pump is arranged in an inner cavity of the advanced cutterhead; the full-hydraulic formwork device comprises a first formwork, a second formwork, a formwork support structure, and formwork guide and moving assemblies; the formwork support structure is a cylindrical structure assembled using structural steel and suspended on a lower part of a hanging scaffold that is on an upper part of the formwork support structure; the formwork guide and moving assemblies are divided into four groups and symmetrically disposed in pairs, one end of each of two groups is connected to the formwork support structure while the other end is connected to the second formwork, and one end of each of the other two groups is connected to the formwork support structure while the other end is connected to the first formwork; the formwork guide and moving assemblies are capable of stretching in order to achieve a radial horizontal displacement of the formwork in the wellbore; the upper muck-discharge system comprises a primary muck-discharge unit, a secondary muck-discharge unit and a control system; the primary muck-discharge unit comprises a primary muck-discharge pump and a primary muck-discharge pipeline, the primary muck-discharge pump is arranged in the inner cavity of the advanced cutterhead, and multi-scale rock mucks and water are discharged upwards to the secondary muck-discharge unit through the primary muck-discharge pipeline; the secondary muck-discharge unit comprises water-muck separating equipment, crushing equipment, grinding equipment, a muck slurry bin and a secondary muck-discharge pump which are arranged in a vertical order from top to bottom; an inlet of the water-muck separating equipment communicates with the primary muck-discharge pipeline, a rock muck outlet communicates to the crushing equipment, and a water outlet communicates to the muck slurry bin; an inlet of the grinding equipment communicates with the rock muck outlet of the water-muck separating equipment, and an outlet of the grinding equipment communicates with the muck slurry bin; and a muck slurry in the muck slurry bin is pumped to the ground through the secondary muck-discharge pump.

2. The full-face shaft tunnel boring machine system according to claim 1, wherein the first guide rollers are distributed at intervals along an axis direction of the vertical guide frame so as to constitute one row from top to bottom, and multiple rows of rollers are arranged at equal intervals along a circumferential direction of the vertical guide frame; on a circumferential surface of the advanced cutterhead, the second guide rollers are distributed at intervals along an axis of the advanced cutterhead so as to constitute one row from top to bottom, and multiple rows of rollers are arranged at equal intervals along a circumferential direction of the advanced cutterhead; on a side of the cutter-expanded boring head, the first hobbing cutters and the first shovel blades are distributed at intervals along a slant height of a cone, multiple first hobbing cutters and multiple first shovel blades are each distributed in a row, multiple rows of first hobs hobbing cutters and multiple rows of first shovel blades are distributed at equal intervals on the side of the cutter-expanded boring head along the circumferential direction of the cone, and a first muck outlet is disposed between any two adjacent rows of first shovel blades; at least one row of second hobbing cutters, and two rows of second shovel blades that are located on both sides of the second hobbing cutters are arranged on a bottom face of the advanced cutterhead; and second muck outlets and the rowed second or the second shovel blades are alternately arranged in the circumferential direction of the advanced cutterhead; and the vertical guide frame and the advanced cutterhead are both hollow cylindrical structures, and a diameter ratio of the advanced cutterhead to the vertical guide frame is in the range of 1:2-1:6.

3. The full-face shaft tunnel boring machine system according to claim 2, wherein two rows of first shovel blades and one row of first hobbing cutters constitute a group of rock-breaking and muck-shoveling system, multiple groups of rock-breaking and muck-shoveling systems are distributed at equal intervals on the side of the cutter-expanded boring head along the circumferential direction, the first muck outlet is disposed between two adjacent rock-breaking and muck-shoveling systems, and one row of the first hobbing cutters is located between the two rows of first shovel blades, in any one group of rock-breaking and muck-shoveling systems.

4. The full-face shaft tunnel boring machine system according to claim 3, wherein the cutter-expanded boring head is a hollow cone, and an included angle between the axis of the cone and the slant height is 15-75 degrees.

5. The full-face shaft tunnel boring machine system according to claim 1, wherein the shaft walling full-hydraulic formwork device further comprises a formwork positioning assembly, which comprises a steel structure support beam connected to the second formwork and the first formwork in a vertical direction, and a telescopic oil cylinder connected to the support beam; the telescopic oil cylinder is disposed along a horizontal direction, an upper end and a lower end of each group of inner second formwork and outer first formwork are each provided with at least one group of telescopic oil cylinders, an inner side end of each telescopic oil cylinder is connected to the support beam while an outer side end is provided with a supporting shoe, the supporting shoe of the telescopic oil cylinder at a lower end of the formwork contacts with a tunneling rock shaft wall, and the supporting shoe of the telescopic oil cylinder at an upper end of the formwork contacts with a poured concrete shaft wall; and a plurality of suspending points are uniformly distributed around an exterior of the formwork support structure, and suspended at a lower part of the hanging scaffold that is at an upper part of the formwork support structure through the steel wire ropes; and a cross section of the formwork support structure is square, and outer walls of the four sides of the formwork support structure are all connected to the formwork guide and moving assemblies.

6. The full-face shaft tunnel boring machine system according to claim 1, wherein a settling pond is disposed on the ground, a secondary muck-discharge pipeline of the secondary muck-discharge pump communicates with the settling pond, partitions are disposed in the settling pond, and clear water passed partition returns to a tunneling working face through a water return pipeline for recycling.

7. The full-face shaft tunnel boring machine system according to claim 1, wherein the muck slurry bin further communicates with a water supply pipe, and a stirring device, a high-level sensor, a low-level sensor and a muck slurry concentration sensor are also disposed in the muck slurry bin; and each sensor and an electromagnetic valve for controlling the water supply pipe to be opened and closed are both electrically connected to the control system.

8. The full-face shaft tunnel boring machine system according to claim 1, wherein in the water-muck separating equipment, the rock muck with a granularity of less than or equal to 0.4 mm directly enters the muck slurry bin together with the water through the pipeline; and in the crushing equipment, the crushed rock muck with a granularity of less than 8 mm enters the grinding equipment.

9. The full-face shaft tunnel boring machine system according to claim 8, wherein in the grinding equipment, the ground rock muck with a granularity of less than 0.4 mm enters the muck slurry bin, and the muck slurry, formed after being stirred, is pumped to the settling pond through the secondary muck-discharge pump.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0051] FIG. 1 is an overall structure diagram of the present disclosure; due to a length limitation of A4, FIG. 1 is divided into three parts for easy show of structures in the present disclosure.

[0052] FIGS. 2 to 4 are local drawings of three parts A, B, C in FIG. 1, respectively.

[0053] FIG. 5 is a profile diagram that a tunnel boring machine cutterhead device is applied in a shaft in the present disclosure (an enlarged drawing of a part D in FIG. 4).

[0054] FIG. 6 is a bottom view of FIG. 5.

[0055] FIG. 7 is a vertical view of a hydraulic formwork for walling a shaft wellbore.

[0056] FIG. 8 is a top view of a hydraulic formwork for walling a shaft wellbore.

[0057] FIG. 9 is a diagram of an outer formwork.

[0058] FIG. 10 is a diagram of an inner formwork.

[0059] FIG. 11 is a vertical view that a formwork is separated from a shaft wall.

[0060] FIG. 12 is a plan view that a formwork is separated from a shaft wall.

[0061] FIG. 13 is a vertical view when a formwork moved downwards.

[0062] FIG. 14 is a plan view when a formwork moved downwards.

[0063] FIG. 15 is a vertical view for secondary positioning and fixation of a formwork.

[0064] FIG. 16 is a plan view for secondary positioning and fixation of a formwork.

[0065] FIG. 17 is a vertical view of secondary walling.

[0066] FIG. 18 is a workflow chart of a muck-discharge method for a tunneling system in the present disclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0067] In order to make the objectives, technical solution and advantages of the the present disclosure clearer, the technical solutions in the embodiments of the present disclosure are clearly and completely elaborated below in combination with the embodiments of the present disclosure. It is apparent that the described embodiments are a part of the embodiments of the present disclosure but not all. Based on the embodiments of the present disclosure, all the other embodiments obtained by those of ordinary skill in the art on the premise of not contributing creative effort should belong to the protection scope of the present disclosure.

[0068] Embodiments: for easy understanding of the present disclosure, the process and principle that the tunnel boring machine cutterhead in the present disclosure tunnels downwards are first set forth. Referring to FIG. 5 and FIG. 6, the tunnel boring machine cutterhead device includes a vertical guide frame 11, a cutter-expanded boring head 12 and an advanced cutterhead 13 that are fixedly connected from top to bottom so as to form an integrated structure.

[0069] The vertical guide frame 11 is a hollow cylindrical profile steel structure, multiple groups of guide rollers are uniformly distributed along a circumference, and the multiple guide rollers contact with the tunneling rock shaft wall to play a vertical guide role; an upper part of the vertical guide frame 11 is connected to a power system through a steel structure such that the whole cutterhead structure is driven to break the rock and tunnel rotationally along a central line of a wellbore; and the power system includes a hydraulic system, an electronic control system, a transmission system and the like, and the hydraulic system, the electronic control system, the transmission system and the like are the current mature technologies, and repetition is not made herein.

[0070] In a specific setting, an included angle between an axis of a cone of the cutter-expanded boring head 12 and a slant height is 15-75 degrees, preferably 25-65 degrees. The vertical guide frame 11 and the advanced cutterhead 13 are both hollow cylindrical structures, a diameter ratio of the advanced cutterhead 13 to the vertical guide frame 11 is 1:2-1:6, preferably 1:3-1:5, so that the cutter-expanded boring head 12 falls along a tilted surface until a rock muck amount in an inner cavity of the advanced cutterhead 13 is within the preferred range.

[0071] The cutter-expanded boring head 12 is a hollow and cone-shaped rigid structural member, of which an upper part is joined to the vertical guide frame 11 while a lower part is joined to the advanced cutterhead 13; multiple groups of hobbing cutters, shovel blades, muck outlets and water holes are uniformly distributed outside the cutter-expanded boring head 12, a vertical and downward pressure is delivered to the cutterhead through the power system and the rock on the working surface is crushed through the rotation and extrusion of the hobbing cutters of the cutter-expanded boring head, the crushed rock muck is stirred and shoveled away through the shovel blades and discharged to a cavity tilted surface inside the cutterhead through the muck outlets; and under a joint action of self-gravity and hydraulic scouring, the rock muck accumulates along the tilted surface and slides to the cavity inside the advanced cutterhead 13, and then the rock muck is pumped to the water-muck separating equipment 321 (as shown in FIG. 3) through a primary muck-discharge pump 311 and a secondary muck-discharge pipeline 312.

[0072] The advanced cutterhead 13 is a hollow and cylindrical steel structure, of which an upper part is joined to the cutter-expanded boring head 12, multiple groups of guide wheels are uniformly distributed around the advanced cutterhead 13 and contact with a rock wall of an advanced guide hole to play a guide role, and a bottom of the advanced cutterhead 13 is uniformly provided with multiple groups of hobbing cutters and shovel blades, muck outlets and water holes; and the vertical and downward pressure is delivered to the cutterhead through the power system and the rock on the working surface is crushed through the rotation and extrusion of the hobbing cutters of the advanced cutterhead 13, and the shovel blades stir and shovel away the crushed rock muck through the rotation of the cutterhead. Under the joint action of the force of water flow and the shovel stirring, the rock muck is discharged to the cavity inside the advanced cutterhead.

[0073] In a specific setting, the first guide rollers 11 are distributed at intervals along an axis direction of the vertical guide frame 1 so as to constitute one row from top to bottom, and multiple rows of rollers are arranged at equal intervals along a circumferential direction of the vertical guide frame 1, which not only plays a guide role, but also plays a role in reducing a frictional force.

[0074] First hobbing cutters 121 and first shovel blades 122 are distributed at intervals along a slant height of the cone on a side of the cutter-expanded boring head 12, a plurality of first hobbing cutters 121 and a plurality of first shovel blades 122 are respectively distributed in a row, and multiple rows of first hobbing cutters 121 and multiple rows of first shovel blades 122 are distributed at equal intervals on the side of the cutter-expanded boring head 12 along a circumferential direction of the cone; first muck outlets 123 are arranged between any two adjacent rows of first shovel blades 122. Further, as shown in FIG. 6, two rows of first shovel blades 122 and one row of first hobbing cutters 121 constitute one group of rock-breaking muck shoveling system, multiple groups of rock-breaking muck shoveling systems are distributed at equal intervals on the side of the cutter-expanded boring head 2 along the circumferential direction, and the first muck outlets 123 are arranged between two adjacent groups of rock-breaking muck shoveling systems. In one group of rock-breaking muck shoveling systems, one row of first hobbing cutters 121 is located between the two rows of first shovel blades 122, the rock on the working face is shoveled through the first shovel blades 122 after being crushed by the first hobbing cutters 121, then the rock falls in the inner cavity of the cutter-expanded boring head 12 through the first muck outlets 123 and finally enters the inner cavity of the advanced cutterhead 13 along the tilted surface of the inner cavity, and then the rock is discharged to the ground through a muck slurry pump and a muck-discharge pipeline 5.

[0075] On a circumferential surface of the advanced cutterhead 13, the second guide rollers 131 are distributed at intervals along an axis of the advanced cutterhead 13 so as to constitute one row from top to bottom, and multiple rows of rollers are arranged at equal intervals along a circumferential direction of the advanced cutterhead 13 and contact with a rock wall of an advanced guide hole, in order to play a guide role and a role in reducing a frictional force.

[0076] At least one row of second hobbing cutters 132 and two rows of second shovel blades 133, located on two sides of the second hobbing cutters 132, are arranged on a bottom face of the advanced cutterhead 13; second muck outlets 134 and the rowed second hobbing cutters 132/second shovel blades 133 are crossly disposed in a circumferential direction of the advanced cutterhead 13; the rock at the bottom face of the advanced guide hole is crushed through the second hobbing cutters 132 during a rotating process, shoveled through the second shovel blades 133, enters the inner cavity of the advanced cutterhead 13 through the second muck outlets 134, and pumped to water-muck separating equipment 321 through a primary muck-discharge pump 311 and a primary muck-discharge pipeline 312.

[0077] When tunneling downwards, referring to FIGS. 7 to 17, a full-hydraulic formwork system performs supporting and walling on a wellbore shaft wall formed through tunneling, and this full-hydraulic formwork device includes:

[0078] a formwork, which is divided into an outer formwork 21 and an inner formwork 22, the outer formwork 21 is an arc-shaped steel structure, of which an outer side is a steel plate and an inner side is a profile steel composite structure, two ends of the outer formwork are tilted surface structures, as shown in FIG. 9, and an included angle between the tilted surface and the outer side is 15-45 degrees, preferably 25-45 degrees. A central angle of an outer arc 2 is greater than a central angle of an inner arc 1. The inner formwork is an arc-shaped steel structure, of which an outer side is a steel plate and an inner side is a profile steel composite structure, two ends of the inner formwork are tilted surface structures, and as shown in FIG. 10, an included angle between the tilted surface and the inner side is 15-45 degrees, preferably 25-45 degrees. A central angle of an outer arc is less than a central angle of an inner arc 1. The outer formwork may also be referred to as first formwork, and the inner formwork may also be referred to as second formwork.

[0079] A formwork support structure 23, which is a cylindrical profile steel composite structure and suspended at a lower part of a hanging scaffold 5 at an upper part thereof; specifically, a plurality of suspending points are uniformly distributed around an exterior of the formwork support structure, and suspended at the lower part of the hanging scaffold 5 that is at the upper part of the formwork support structure through steel wire ropes 29; and a cross section of the formwork support structure is square, and outer walls of the four sides of the formwork support structure are all connected to formwork guide and moving assemblies.

[0080] One end of each of the formwork guide and moving assemblies 25 is connected to the formwork support structure 23 while the other end is connected to the formwork, and the formwork guide and moving assemblies 25 can stretch in order to achieve a radial horizontal displacement of the formwork in the wellbore. Specifically, each formwork guide and moving assembly is a double-layer cylindrical steel structure, an inner cylinder and an outer cylinder are sleeved and can displace relatively along an axis, an end part of the outer cylinder is connected to the formwork support structure through a first flange, and an end part of the inner cylinder is connected to the inner formwork and the outer formwork through a second flange; and at least two groups of hydraulic oil cylinders 28 are disposed outside the outer cylinder, and two ends of the hydraulic oil cylinders are connected to the first flange and the second flange, respectively.

[0081] In this embodiment, the shaft walling full-hydraulic formwork device further includes a formwork positioning assembly 26, which includes a steel structure support beam connected to the inner formwork and the outer formwork in a vertical direction, and a telescopic oil cylinder connected to the support beam; the telescopic oil cylinder is disposed along a horizontal direction, an upper end and a lower end of each group of inner formwork and outer formwork are each provided with at least one group of telescopic oil cylinders, an inner side end of each telescopic oil cylinder is connected to the support beam while an outer side end is provided with a supporting shoe, the supporting shoe of the telescopic oil cylinder at the lower end of the formwork contacts with a tunneling rock shaft wall 210, and the supporting shoe of the telescopic oil cylinder at the upper end of the formwork contacts with a poured concrete shaft wall 27.

[0082] When tunneling downwards, the rock muck is discharged in time through a muck-discharge system. Referring to FIGS. 1 to 4, the muck-discharge system in the present disclosure includes a primary muck-discharge unit, a secondary muck-discharge unit and a control system.

[0083] The primary muck-discharge unit includes a primary muck-discharge pump 311 and a primary muck-discharge pipeline 312, the primary muck-discharge pump 311 is arranged in the inner cavity of the advanced cutterhead 13, and multi-scale rock muck and water are discharged upwards to the secondary muck-discharge unit through the primary muck-discharge pipeline 312.

[0084] The secondary muck-discharge unit includes water-muck separating equipment 321, crushing equipment 322, grinding equipment 323, a muck slurry bin 324 and a secondary muck-discharge pump 325 which are arranged from top to bottom; and each piece of equipment may be disposed on the multi-layer hanging scaffold in the wellbore.

[0085] An inlet of the water-muck separating equipment 321 communicates with the primary muck-discharge pipeline 312, a rock muck outlet communicates to the crushing equipment and a water outlet (a fine muck outlet) communicates to the muck slurry bin 324; an inlet of the grinding equipment 323 communicates with the rock muck outlet of the water-muck separating equipment, and an outlet of the grinding equipment 323 communicates with the muck slurry bin 324; and a muck slurry in the muck slurry bin 324 is pumped to the ground through the secondary muck-discharge pump 325.

[0086] In a specific application, a settling pond 33 is disposed on the ground, the secondary muck-discharge pipeline 326 of the secondary muck-discharge pump 325 communicates with the settling pond 33, partitions 331 are disposed in the settling pond 33, and clear water passed partition returns to the tunneling working face through a water return pipeline 332 for recycling.

[0087] In order to make the muck slurry in the muck slurry bin be in a suitable concentration, the muck slurry bin 324 further communicates with a water supply pipe 3241, and a stirring device 3242, a high-level sensor 3243, a low-level sensor 3244 and a muck slurry concentration sensor 3245 are also disposed in the muck slurry bin 324; and each sensor and an electromagnetic valve for controlling the water supply pipe 3241 to be opened and closed are both electrically connected to the control system. A water pump 35 is connected to the upper end of the water supply pipe 3241 as a water source. The upper end of the water supply pipe 3241 can be connected to any other kind of water source as well.

[0088] The working process and the working method of the muck-discharge system generally include the following steps, and some conventional construction steps are omitted and not repeated herein.

[0089] S1: arranging the primary muck-discharge pump 311 in the inner cavity of the tunneling cutterhead of the tunnel boring machine, and connecting the primary muck-discharge pipeline 312 to a place where the water-muck separating equipment 3321 is located.

[0090] S2: suspending the multi-layer hanging scaffold 5 for construction in the tunneling wellbore, successively arranging the second muck-discharge pump 325, the muck slurry bin 324, the grinding equipment 323, the crushing equipment 322 and the water-muck separating equipment 321 on the hanging scaffolds at different layers from bottom to top, arranging the water supply pipe 3241 of the muck slurry bin 324 and other equipment, connecting corresponding pipelines and installing adaptive valves, connecting inlets and outlets among equipment, and other preparatory work.

[0091] S3: communicating the secondary muck-discharge pipeline 326 of the secondary muck-discharge pump 325 with the settling pond 33, and the clear water of the settling pond 33 returning to the tunneling working face through the water return pipeline 332.

[0092] S4: the rock muck, generated during the tunneling process of the tunnel boring machine, falling into the inner cavity of the tunneling cutterhead, and forming the multi-scale rock muck slurry after being mixed with the water returned from the settling pond, and when reaching a certain setting depth, the rock muck slurry being pumped to the water-muck separating equipment 321 through the primary muck-discharge pump 311.

[0093] S5: in the water-muck separating equipment 321, the rock muck with the granularity less than or equal to 0.4 mm and the water entering the muck slurry bin 324 directly through the pipeline, the large-scale rock muck entering the crushing equipment 322, the crushed rock muck with the rock muck granularity of less than 8 mm entering the grinding equipment 323, the ground rock muck with the rock muck granularity of less than 0.4 mm entering the muck slurry bin 324 to be stirred with the water, supplied by the water supply pipe 3241, in the muck slurry bin through the stirring device 3242 in order to form the muck slurry, controlling the valve in the water supply pipe 3241 to be opened and closed according to a signal fed back by the muck slurry concentration sensor 3245 in the muck slurry bin, in order to control the muck slurry to be always kept in a setting concentration scope.

[0094] S6: the outlet valve of the muck slurry bin 324 being controlled to be opened and closed through the signal fed back by the high-level sensor 3243 and the low-level sensor 3244 in the muck slurry bin 324, the muck slurry with the suitable concentration being pumped to the settling pond 33 through the secondary muck-discharge pipeline 326 from the outlet of the muck slurry bin to the secondary muck-discharge pump 325.

[0095] S7: the settled rock muck being loaded and outwards transported to using sites, and the settled clear water returning to the tunneling working face through the water return pipeline 332, and so on.

[0096] A sinking headframe is installed on the construction wellbore ground, and a multi-layer platform and a plurality of head sheaves are disposed on the headframe. The hoisting winch and the suspension winch are joined to the multi-layer hanging scaffold, the pipeline and the tunnel boring machine equipment through the steel wire ropes and around the head sheaves. The ground is installed with the hoisting winch, which is responsible for up and down transportation of personnel, materials and equipment, and at the same time, multiple sets of suspension winches are installed and responsible for vertical up and down movement of the multi-layer hanging scaffold and accessory equipment in the wellbore. A centralized control center is disposed on the ground, the control system therein is connected to each equipment, pump, valve, sensor and the like through control cables, in order to control the muck-discharge system to achieve full-automatic continuous operation, thereby achieving unattended operation.

[0097] In the specification, the term sinking headframe is a standard term that refers to a structure used for supporting and hoisting pulleys, suspending sheaves, and erecting debris removal facilities during well drilling operations, and the term head sheave is also a standard term that refers to the topmost adjustable pulley on the mine shaft headframe for controlling the direction of movement of the adjusting wire rope.

[0098] It should be noted that the part not set forth in detail in the present disclosure belongs to the general common technology in the field or may be acquired by purchasing from the market directly without contributing creative labor by those skilled in the art, and the specific connection mode thereof has an extremely wide range of application in the field or daily life, and detail description is not made herein.

[0099] In addition, without conflicting, those skilled in the art may combine and assemble different embodiments or examples and the characteristics of the different embodiments or examples. Although the embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary instead of being understood as a limitation to the present disclosure. Those of ordinary skill in the art may make change, modification, replacement and deformation to the above embodiments within the scope of the present disclosure.