Construction method of underground vertical coal bunker and underground vertical coal bunker excavation system

Abstract

The present invention provides a construction method of an underground vertical coal bunker and an underground vertical coal bunker excavation system, the construction method of the underground vertical coal bunker comprising: step S10, drilling a slag guide hole; step S20, excavating a starting foundation pit; step S30, installing an underground vertical coal bunker excavation system in the starting foundation pit; step S40, the underground vertical coal bunker excavation system excavates the underground vertical coal bunker from top to bottom; step S50, supporting the shaft wall of the underground vertical coal bunker; the underground vertical coal bunker excavation system comprises a tunneling machine and a vertical motion system, the tunneling machine is used for excavation, the tunneling machine is installed on the vertical motion system, and the vertical motion system can drive the tunneling machine to move vertically. Through the present invention, the technical problems of high labor intensity, long well construction period and low construction efficiency existing in the construction of underground coal bunkers are alleviated.

Description

Technical Field

[0001] The invention relates to the technical field of underground vertical coal bunker construction, and in particular to an underground vertical coal bunker construction method and an underground vertical coal bunker excavation system. Background Art

[0002] An underground coal bunker is a place for temporary storage of coal at the bottom of a coal mine, which is of great significance for ensuring the continuity of coal mine production. At present, the main construction method of an underground coal bunker is to first use a raise borer to drill a slag hole, and then use drilling and blasting to expand the hole for a second time to meet the design size requirements. The drilling and blasting method has relatively large safety hazards, high labor intensity, long well construction period, and low construction efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a construction method of an underground vertical coal bunker and an underground vertical coal bunker excavation system to alleviate the technical problems of high labor intensity, long well construction period and low construction efficiency in the construction of underground coal bunker.

[0004] The above-mentioned purpose of the present invention can be achieved by adopting the following technical solutions:

[0005] The present invention provides a construction method for an underground vertical coal bunker, comprising:

[0006] Step S10, drilling a slag guide hole;

[0007] Step S20, excavating a starting foundation pit;

[0008] Step S30, installing an underground vertical coal bunker excavation system in the starting foundation pit;

[0009] Step S40, the underground vertical coal bunker excavation system excavates the underground vertical coal bunker from top to bottom;

[0010] Step S50, supporting the shaft wall of the underground vertical coal bunker;

[0011] The underground vertical coal bunker excavation system includes a tunneling machine and a vertical motion system. The tunneling machine is used for excavation. The tunneling machine is installed on the vertical motion system. The vertical motion system can drive the tunneling machine to move vertically.

[0012] In a preferred embodiment, the vertical motion system includes a pressure-lifting device and a wall protection pipe segment system, the wall protection pipe segment system includes a pipe segment, the tunnel boring machine is installed on the pipe segment, and the pressure-lifting device is connected to the pipe segment and can lock the pipe segment or drive the pipe segment to move vertically.

[0013] In a preferred embodiment, the pressure-lifting device includes a fixed cylinder, a step-changing cylinder and a thrust cylinder. The fixed cylinder and the step-changing cylinder can be independently locked with or separated from the pipe section. The thrust cylinder is connected to the step-changing cylinder and can lock the step-changing cylinder or drive the step-changing cylinder to move vertically.

[0014] In a preferred embodiment, the tunnel boring machine includes a propulsion system and an excavation unit, wherein the excavation unit is installed on the propulsion system, and the propulsion system can drive the excavation unit to move vertically; the propulsion system is installed on the vertical motion system.

[0015] In a preferred embodiment, the propulsion system includes a pushing and fixing device, a pushing cylinder and a sliding leg, the pushing and fixing device is installed on the vertical motion system, the pushing cylinder is connected to the sliding leg and can drive the sliding leg to move vertically relative to the pushing and fixing device, and the excavation unit is installed on the sliding leg.

[0016] In a preferred embodiment, the roadheader comprises a plurality of circumferentially distributed propulsion systems, wherein the propulsion systems are arranged between the excavation unit and the vertical motion system.

[0017] In a preferred embodiment, the tunnel boring machine includes a slewing drive device, a swing arm cylinder and a cutting part, the cutting part is rotatably connected to the slewing drive device, the swing arm cylinder is connected to the cutting part and can drive the cutting part to swing up and down relative to the slewing drive device; and the slewing drive device can drive the cutting part to rotate.

[0018] In a preferred embodiment, the construction method includes: step S60, the tunnel boring machine is lifted upward and performs excavation; the step S60 is performed after the step S40.

[0019] In a preferred embodiment, the roadheader includes a propulsion system and an excavation unit, the excavation unit is installed on the propulsion system, and the propulsion system can drive the excavation unit to move vertically; the propulsion system is installed on the vertical motion system; the excavation unit includes the rotary drive device, the swing arm cylinder and the cutting part; the step S60 includes:

[0020] Step S61, retracting the swing arm cylinder, and the vertical motion system drives the tunnel boring machine to move to the excavation height;

[0021] Step S62, the propulsion system drives the excavation unit to move upward to the upper position, the swing arm cylinder drives the cutting part to swing outward to the inner position, and the cutting part performs a first excavation under the drive of the rotary drive device;

[0022] Step S63, the propulsion system drives the excavation unit to move downward, the swing arm cylinder drives the cutting part to swing outward, and the cutting part performs a second excavation under the drive of the rotary drive device;

[0023] Step S64, retract the swing arm cylinder, and the vertical motion system drives the tunnel boring machine to move upward, and repeat steps S62 and S63.

[0024] The present invention provides an underground vertical coal bunker tunneling system, comprising: a tunneling machine and a vertical motion system, wherein the tunneling machine is used for excavation, the tunneling machine is installed on the vertical motion system, and the vertical motion system can drive the tunneling machine to move vertically; the tunneling machine comprises a propulsion system and an excavation unit, the excavation unit is installed on the propulsion system, and the propulsion system can drive the excavation unit to move vertically; the propulsion system is installed on the vertical motion system.

[0025] The characteristics and advantages of the present invention are:

[0026] The vertical motion system drives the tunnel boring machine to move vertically, and the tunnel boring machine completes the excavation of the underground vertical coal bunker. During the excavation process, the slag can fall through the slag guide hole for slag discharge. This construction method uses mechanical methods instead of drilling and blasting methods to construct the underground vertical coal bunker, reducing the number of construction workers going down the mine, improving safety, reducing the labor intensity of construction workers, and improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1-Figure 2 A working state diagram of the construction method of the underground vertical coal bunker provided by the present invention;

[0029] Figure 3 A top view of the underground vertical coal bunker excavation system provided by the present invention;

[0030] Figure 4 A schematic diagram of the structure of a propulsion system in an underground vertical coal bunker excavation system provided by the present invention;

[0031] Figure 5 A schematic diagram of the structure of a pressure-raising device in an underground vertical coal bunker excavation system provided by the present invention;

[0032] Figure 6A schematic diagram of the construction method of the underground vertical coal bunker provided by the present invention;

[0033] Figure 7-Figure 8 This is a schematic diagram of the structure of the underground vertical coal bunker.

[0034] Description of Figure Numbers:

[0035] 10. excavation unit; 11. cutting part; 111. cutting head; 112. cutting arm;

[0036] 12. Rotation drive device; 121. Driving unit; 122. Driving fixing device; 123. Rotation mechanism;

[0037] 13. Swing arm cylinder;

[0038] 20. Propulsion system; 21. Pushing and fixing device; 22. Pushing cylinder; 23. Sliding legs;

[0039] 300, vertical motion system;

[0040] 30. Wall protection pipe joint system; 31. Blade foot pipe joint; 32. Support pipe joint; 33. Standard pipe joint;

[0041] 40. Lifting and pressing device; 41. Fixed oil cylinder; 42. Step-changing oil cylinder; 43. Propelling cylinder; 44. Lifting and pressing device frame; 441. Guide column;

[0042] 51. Slag guide hole; 52. Bell mouth. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Solution 1

[0045] The present invention provides a construction method for an underground vertical coal bunker, such as Figure 6 As shown, the construction method includes: step S10, drilling a slag guide hole 51; step S20, excavating a starting foundation pit; step S30, installing an underground vertical coal bunker excavation system in the starting foundation pit; step S40, the underground vertical coal bunker excavation system excavates the underground vertical coal bunker from top to bottom; step S50, supporting the shaft wall of the underground vertical coal bunker; Figure 1 and Figure 2As shown, the underground vertical coal bunker excavation system includes a tunneling machine and a vertical motion system 300. The tunneling machine is used for excavation. The tunneling machine is installed on the vertical motion system 300. The vertical motion system 300 can drive the tunneling machine to move vertically.

[0046] The vertical motion system 300 drives the tunneling machine to move vertically, and the tunneling machine completes the excavation of the underground vertical coal bunker. During the excavation process, the slag can fall through the slag guide hole 51 for slag discharge. The construction method uses a mechanical method instead of a drilling and blasting method to construct the underground vertical coal bunker, which reduces the number of construction workers going down the mine, improves safety, reduces the labor intensity of construction workers, and improves construction efficiency.

[0047] In one embodiment, the vertical motion system 300 includes a pressure-raising device 40 and a wall protection pipe segment system 30. The wall protection pipe segment system 30 includes a pipe segment. The tunnel boring machine is installed on the pipe segment. The pressure-raising device 40 is connected to the pipe segment and can lock the pipe segment or drive the pipe segment to move vertically. The tunnel boring machine performs excavation work. The wall protection pipe segment system 30 is responsible for connecting the pressure-raising device 40 and the tunnel boring machine, and plays a role in supporting the shaft wall and protecting the tunnel boring machine. The pressure-raising device 40 can drive the tunnel boring machine to move downward. The wall protection pipe segment system 30, the pressure-raising device 40 and the tunnel boring machine cooperate to complete the excavation of the underground vertical coal bunker. The wall protection pipe segment system 30 provides support for the tunnel boring machine and plays a role in supporting the shaft wall. Specifically, the pipe segments in the wall protection pipe segment system 30 include blade foot pipe segments 31, support pipe segments 32 and standard pipe segments 33.

[0048] Furthermore, the pressure-lifting device 40 includes a fixed cylinder 41, a step-changing cylinder 42 and a propulsion cylinder 43. The fixed cylinder 41 and the step-changing cylinder 42 can be independently locked with or separated from the pipe section. The propulsion cylinder 43 is connected to the step-changing cylinder 42 and can lock the step-changing cylinder 42 or drive the step-changing cylinder 42 to move vertically. Specifically, a pin hole is reserved on the support pipe section 32, and the pin shaft of the step-changing cylinder 42 is connected to the pin hole on the support pipe section 32. When the step-changing cylinder 42 is extended and the pin shaft is inserted into the pin hole of the support pipe section 32, the step-changing cylinder 42 is locked with the support pipe section 32; when the step-changing cylinder 42 is retracted and the pin shaft is withdrawn from the pin hole of the support pipe section 32, the step-changing cylinder 42 is separated from the support pipe section 32. A similar structure can be used between the fixed cylinder 41 and the pipe section to achieve locking and separation, which will not be repeated here.

[0049] like Figure 5As shown, the lifting and pressing device 40 also includes a lifting and pressing device frame 44, a fixed oil cylinder 41 is connected to the lifting and pressing device frame 44, and is fixed at the bottom of the lifting and pressing device frame 44; the step-changing oil cylinder 42 is connected to the guide column 441 on the lifting and pressing device frame 44, and is also connected to the cylinder body of the propulsion cylinder 43; the piston rod of the propulsion cylinder 43 is connected to the lifting and pressing device frame 44, and the cylinder body of the propulsion cylinder 43 is connected to the step-changing oil cylinder 42. When the propulsion cylinder 43 is extended or retracted, it will drive the step-changing oil cylinder 42 to move up and down along the guide column 441 of the lifting and pressing device frame 44.

[0050] In one embodiment, the roadheader includes a propulsion system 20 and an excavation unit 10, the excavation unit 10 is installed on the propulsion system 20, and the propulsion system 20 can drive the excavation unit 10 to move vertically; the propulsion system 20 is installed on the vertical motion system 300. Figure 1 and Figure 2 As shown, the tunnel boring machine is connected to the wall protection pipe segment system 30, and the pressure-raising device 40 is connected to the wall protection pipe segment system 30. The pressure-raising device 40 can make the wall protection pipe segment system 30 drive the tunnel boring machine to move vertically. At the same time, the excavation unit 10 in the tunnel boring machine can make vertical relative movement with the wall protection pipe segment system 30 under the action of the propulsion system 20. The two movements cooperate to realize the step-by-step excavation of the vertical coal bunker.

[0051] Furthermore, the propulsion system 20 includes a push fixing device 21, a push cylinder 22 and a sliding leg 23. Figure 1-Figure 4 As shown, the push-fixing device 21 is installed on the vertical motion system 300 , the push cylinder 22 is connected to the sliding leg 23 and can drive the sliding leg 23 to move vertically relative to the push-fixing device 21 , and the excavation unit 10 is installed on the sliding leg 23 .

[0052] Specifically, the cylinder body of the pushing cylinder 22 is connected to the sliding leg 23, and the piston rod of the pushing cylinder 22 is connected to the pushing fixing device 21. The pushing cylinder 22 extends and retracts, driving the sliding leg 23 to slide on the pushing fixing device 21. Since the sliding leg 23 is connected to the excavation unit 10, it will also drive the entire excavation unit 10 to move up and down at the same time.

[0053] The number of propulsion systems 20 may be one or more. Figure 3 As shown, the roadheader includes a plurality of circumferentially distributed propulsion systems 20 , and the propulsion systems 20 are arranged between the excavation unit 10 and the vertical motion system 300 ; preferably, the roadheader includes three propulsion systems 20 .

[0054] In one embodiment, the tunnel boring machine includes a slewing drive device 12, a swing arm cylinder 13 and a cutting part 11. The cutting part 11 is rotatably connected to the slewing drive device 12. The swing arm cylinder 13 is connected to the cutting part 11 and can drive the cutting part 11 to swing up and down relative to the slewing drive device 12; and the slewing drive device 12 can drive the cutting part 11 to rotate. The swing arm cylinder 13 can adjust the swing angle of the cutting part 11 to control the excavation diameter. The slewing drive device 12, the swing arm cylinder 13 and the cutting part 11 serve as the excavation unit 10 of the tunnel boring machine. The sliding leg 23 is connected to the slewing drive device 12, and the push cylinder 22 performs an extension and retraction action, driving the sliding leg 23 to slide on the push fixing device 21, and at the same time drives the slewing drive device 12, the swing arm cylinder 13 and the cutting part 11 to move up and down. Figure 1 and Figure 2 As shown, the rotary drive device 12 includes a driving portion 121 , a driving fixing device 122 and a rotary mechanism 123 , and the cutting portion 11 includes a cutting head 111 and a cutting arm 112 .

[0055] In one embodiment, the construction method includes: step S60, the tunnel boring machine is lifted upward and excavated; step S60 is implemented after step S40. Step S40 performs the first excavation from top to bottom, and then step S60 performs excavation from bottom to top, thereby expanding the storage capacity of the underground vertical coal bunker.

[0056] Further, the tunnel boring machine includes a propulsion system 20 and an excavation unit 10, the excavation unit 10 is installed on the propulsion system 20, and the propulsion system 20 can drive the excavation unit 10 to move vertically; the propulsion system 20 is installed on the vertical motion system 300; the excavation unit 10 includes a rotary drive device 12, a swing arm cylinder 13 and a cutting part 11; step S60 includes: step S61, retracting the swing arm cylinder 13, and the vertical motion system 300 drives the tunnel boring machine to move to the expansion height; step S62, the propulsion system 20 drives the excavation The unit 10 moves upward to the upper position, the swing arm cylinder 13 drives the cutting part 11 to swing outward to the inner position, and the cutting part 11 performs the first expansion under the drive of the rotary drive device; step S63, the propulsion system 20 drives the excavation unit 10 to move downward, the swing arm cylinder 13 drives the cutting part 11 to expand and swing outward, and the cutting part 11 performs the second expansion under the drive of the rotary drive device; step S64, retract the swing arm cylinder 13, the vertical motion system 300 drives the tunneling machine to move upward, and repeat steps S62 and S63. Through step S60, the storage capacity of the underground vertical coal bunker is expanded, and the tunneling efficiency is improved, and a bell mouth 52 can be formed at the upper part of the underground vertical coal bunker to ensure smooth communication between the underground vertical coal bunker and the roadway above it.

[0057] Figure 8The underground vertical coal bunker shown has a straight opening at the top and a bell-shaped opening 52 at the bottom. The diameter of the coal bunker is usually determined according to the required coal bunker storage capacity, but due to the limited size of the tunnel, the size of the upper and lower openings of the coal bunker is limited. In order to expand the coal bunker storage capacity, Figure 7 As shown, the diameter of the middle part of the coal bunker is increased to meet the storage demand, forming an underground vertical coal bunker with bell mouths 52 at both the upper and lower ends.

[0058] against Figure 8 shown Underground vertical coal bunker with straight top and bell-shaped bottom The construction method includes: step S10, step S20, step S30, step S40 and step S50.

[0059] Step S10, step S20 and step S30 are implemented in sequence, including the following specific steps: (1) using a raise boring machine, excavate a slag guide hole 51 that passes through the upper and lower tunnels along the center of the coal bunker, generally with a diameter of 1.2m~1.4m; (2) excavate a starting pit of suitable depth with the slag guide hole 51 as the center; (3) install a wall protection pipe segment system 30 in the starting pit, and harden and strengthen the periphery of the wellhead, install several groups of pressure-raising devices 40 around the wellhead, connect the pin shaft of the step-changing cylinder 42 with the pin hole reserved on the support pipe segment 32; (4) install various components of the tunnel boring machine at the bottom of the starting pit, and install and fix the pushing and fixing device 21 of the tunnel boring machine with the support pipe segment 32, install various pipelines at the same time, install the control system on the ground, and complete the whole machine debugging.

[0060] Step S40 is implemented after step S30 , and step S40 includes step S41 , step S42 , step S43 and step S44 .

[0061] Step S41 includes the following specific steps: (1) operate the tunnel boring machine, start the cutting head 111, and then start the driving unit 121. The driving unit 121 drives the slewing mechanism 123 to rotate. Since the cutting part 11 is connected to the slewing mechanism 123, when the slewing mechanism 123 rotates, it will drive the cutting part 11 to rotate. Therefore, in addition to its own rotation, the cutting head 111 will also rotate with the slewing mechanism 123; (2) after completing one rotation, the push cylinder 22 extends a section to drive the sliding leg 23 to move upward. Since the sliding leg 23 is connected to the driving fixing device 122 in the slewing driving device 12, the extension of the push cylinder 22 will drive the tunnel boring machine to move upward; at the same time, the swing arm cylinder 13 extends, the cutting part 11 expands outward by an angle, and then the slewing mechanism 123 rotates to drive the cutting part 11 to rotate, completing one rotation; (3) repeat the above steps until the stroke of the push cylinder 22 is completely used up, and one section is cut, and the coal bunker forms a conical bottom surface. During the excavation process, the slag will slide along the conical surface into the slag guide hole 51 in the middle, and then fall into the tunnel below the coal bunker to complete the slag discharge.

[0062] Step S42 includes the following specific steps: (1) After the full-section cutting of the conical bottom surface is completed, the swing arm cylinder 13 is retracted to make the cutting head 111 in the middle state; and the push cylinder 22 is retracted to move the tunnel boring machine down to the lower position; (2) the push cylinder 43 is retracted for a section. Since the step-changing cylinder 42 is fixedly connected to the push cylinder 43 at this time, and the step-changing cylinder 42 is fixedly connected to the support pipe section 32 or the standard pipe section 33 through a pin shaft, when the push cylinder 43 is retracted, the wall protection pipe section system 30 and the tunnel boring machine move down, and the tunnel boring machine moves downward; the above step S41 is implemented again. Step S42 is repeated until the stroke of the push cylinder 43 is exhausted.

[0063] Step S43 includes the following specific steps: (1) extending the fixed cylinder 41 and connecting it to the supporting pipe segment 32 or the standard pipe segment 33, and retracting the step-changing cylinder 42; (2) assembling the standard pipe segment 33 and fixing it to the supporting pipe segment 32 or the standard pipe segment 33; (3) extending the propulsion cylinder 43, extending the step-changing cylinder 42 and fixing it to the standard pipe segment 33, and retracting the fixed cylinder 41 to complete the pipe segment assembly and proceed to the next cycle.

[0064] Step S44 includes the following specific steps: looping steps S41-S43 until the lower end of the conical surface at the bottom of the coal bunker is connected to the lower tunnel. Since a coal distributor needs to be installed at the bottom of the coal bunker, the conical surface at the bottom needs to be retained. During the excavation process of step S40, the slag will slide along the conical surface into the middle slag guide hole 51, and then fall into the tunnel below the coal bunker to complete the slag removal, realizing the use of mechanical methods instead of manual methods to push the slag into the slag guide hole 51 for slag removal, thereby reducing the labor intensity of construction workers.

[0065] After step S40, the pressure-lifting device 40 is used to lift the wall protection pipe segment system 30 and the tunnel boring machine out of the well to complete the equipment withdrawal. The specific steps include: retracting the swing arm cylinder 13, extending the push cylinder 43, so that the wall protection pipe segment system 30 drives the tunnel boring machine to move upward, extending the fixed cylinder 41 to connect with the standard pipe segment 33, retracting the step-changing cylinder 42, retracting the push cylinder 43, and removing the top section of the standard pipe segment 33; extending the step-changing cylinder 42 to connect with the next ring of standard pipe segments 33, retracting the fixed cylinder 41, extending the push cylinder 43, so that the wall protection pipe segment system 30 and the tunnel boring machine move upward; repeating the above steps until the equipment is lifted to the tunnel at the upper entrance of the coal bunker. After the equipment is lifted to the well, step S50 is performed to support the coal bunker shaft wall, install the lower coal distributor, etc., to complete the construction of the coal bunker.

[0066] against Figure 7 shown Vertical coal bunker with bell mouth 52 at upper and lower ends The construction method includes: step S10, step S20, step S30, step S40, step S60 and step S50. Step S10, step S20, step S30 and step S40 are implemented in sequence, and are basically the same as the construction method of the underground vertical coal bunker with a straight upper end and a bell mouth 52 at the lower end, and will not be repeated here.

[0067] After step S40, step S60 is implemented. In step S60, the well pressure lifting device 40 is used to lift the wall protection pipe segment system 30 and the tunnel boring machine upward. During the lifting process, the tunnel boring machine performs digging and advancing until it reaches the wellhead, completing the tunneling and equipment withdrawal. Specifically, step S60 includes steps S61, S62, S63, and S64.

[0068] Step S61, step S62 and step S63 include the following specific steps: (1) retracting the swing arm cylinder 13, extending the thrust cylinder 43, so that the wall protection pipe section system 30 drives the tunnel boring machine to move upward to reach the excavation height (i.e., step S61); (2) extending the push cylinder 22 to the limit position, extending the swing arm cylinder 13 to make the cutting part 11 swing outward, starting the cutting head 111 to cut the rock wall, and then starting the driving part 121. The driving part 121 drives the slewing mechanism 123 to rotate. Since the cutting part 11 is connected to the slewing mechanism 123, when the slewing mechanism 123 rotates, it will drive the cutting part 11 to rotate. Therefore, in addition to rotating on its own, the cutting head 111 will also rotate with the slewing mechanism 123 to perform the first excavation. (i.e., step S62); (3) after completing one rotation, the swing arm cylinder 13 is retracted to make the cutting part 11 swing inward to avoid interference, and then the push cylinder 22 is retracted a section to drive the sliding leg 23 to move downward. Since the sliding leg 23 is connected to the driving fixing device 122 in the rotary drive device 12, the extension of the push cylinder 22 will drive the tunneling machine to move downward; (4) The swing arm cylinder 13 is extended again, and the cutting part 11 expands outward by an angle; (5) The rotary mechanism 123 rotates to drive the cutting part 11 to rotate, completing one rotation and performing the second expansion; (6) The above steps (3), (4) and (5) are repeated to perform multiple expansions until the stroke of the push cylinder 22 is exhausted and the cross-section cutting is completed.

[0069] In some implementations of step S63, after the push cylinder 22 drives the sliding leg 23 to move downward for a certain distance, the above (4) and (5) can be implemented in multiple cycles, that is, in one expansion, after the cutting part 11 expands outward by a smaller angle, the rotary mechanism 123 drives the cutting part 11 to rotate; then, the cutting part 11 expands outward by a smaller angle again and then rotates, and this cycle is repeated multiple times to achieve expansion to the desired angle. In the first expansion of step S62, the cutting part 11 can also be expanded outward multiple times.

[0070] Step S64 includes the following specific steps: (1) retracting the swing arm cylinder 13 and extending the push cylinder 22 to the stroke limit; (2) extending the fixed cylinder 41 to connect with the standard pipe section 33; (3) after retracting the step-changing cylinder 42, retracting the push cylinder 43; (4) removing a section of the standard pipe section 33; (5) extending the step-changing cylinder 42 to connect with the next ring of standard pipe sections 33, retracting the fixed cylinder 41, and extending the push cylinder 43 to move the wall protection pipe section system 30 and the tunnel boring machine upward; (6) performing the cutting operation according to step S62 and step S63. In some embodiments, the extension of the push cylinder 43 to drive the wall protection pipe section system 30 and the tunnel boring machine to move upward can be implemented in multiple stages, that is, within the stroke of the push cylinder 43, the push cylinder 43 is divided into multiple stages and moves upward stage by stage, and the tunnel boring machine performs the cutting operation every time it moves upward stage.

[0071] In step S60, steps S62-S64 can be repeated until the excavation is completed to the wellhead. Then, the swing arm cylinder 13 is retracted to lift the equipment to the upper tunnel. After the equipment is lifted to the well, step S50 is implemented: the coal bunker wall support, the lower coal distributor installation, etc. are carried out to complete the construction of the coal bunker. Through this construction method, the use of mechanical excavation can save at least 50% of the construction time compared with the drilling and blasting method.

[0072] Solution 2

[0073] The present invention provides an underground vertical coal bunker excavation system, such as Figure 1-Figure 5 As shown, the underground vertical coal bunker excavation system includes: a tunneling machine and a vertical motion system 300, the tunneling machine is used for excavation, the tunneling machine is installed on the vertical motion system 300, and the vertical motion system 300 can drive the tunneling machine to move vertically; the tunneling machine includes a propulsion system 20 and an excavation unit 10, the excavation unit 10 is installed on the propulsion system 20, and the propulsion system 20 can drive the excavation unit 10 to move vertically; the propulsion system 20 is installed on the vertical motion system 300.

[0074] The vertical motion system 300 drives the tunnel boring machine to move vertically. At the same time, the excavation unit 10 in the tunnel boring machine can make vertical relative motion with the wall protection pipe segment system 30 under the action of the propulsion system 20. The two movements cooperate to realize the step-by-step excavation of the vertical coal bunker. The tunnel boring machine completes the excavation of the underground vertical coal bunker and uses mechanical methods instead of drilling and blasting methods to carry out the construction of the underground vertical coal bunker, reducing the number of construction personnel going down the mine to work, improving safety, reducing the labor intensity of construction personnel, and improving construction efficiency.

[0075] The tunneling machine components in the underground vertical coal bunker tunneling system are small in size and light in weight, easy to install and disassemble, and suitable for limited installation space underground.

[0076] The above are only several embodiments of the present invention. Those skilled in the art may make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A construction method for an underground vertical coal bunker, used for excavation of a vertical coal bunker with bell mouths at the upper and lower ends, characterized in that: include: Step S10, drilling a slag guide hole; Step S20, excavating a starting foundation pit; Step S30, installing an underground vertical coal bunker excavation system in the starting foundation pit; Step S40, the underground vertical coal bunker excavation system excavates the underground vertical coal bunker from top to bottom, and reserves a first unexcavated portion at the bottom of the excavation section to form a lower end bell mouth; Step S60, the underground vertical coal bunker excavation system is lifted upward and excavated, and a second unexcavated portion is reserved at the top of the excavation section to form an upper bell mouth; Step S50, supporting the shaft wall of the underground vertical coal bunker; The underground vertical coal bunker excavation system includes a tunneling machine and a vertical motion system, wherein the tunneling machine is used for excavation, the tunneling machine is installed on the vertical motion system, and the vertical motion system can drive the tunneling machine to move vertically; The tunnel boring machine comprises a rotary drive device, a swing arm oil cylinder and a cutting part, wherein the cutting part is rotatably connected to the rotary drive device, the swing arm oil cylinder is connected to the cutting part and can drive the cutting part to swing up and down relative to the rotary drive device; and the rotary drive device can drive the cutting part to rotate; The roadheader comprises a propulsion system and an excavation unit, wherein the excavation unit is installed on the propulsion system, and the propulsion system can drive the excavation unit to move vertically; The propulsion system is installed on the vertical motion system; The excavation unit includes the rotary drive device, the swing arm cylinder and the cutting part; The step S60 comprises: Step S61, retracting the swing arm cylinder, and the vertical motion system drives the tunnel boring machine to move to the excavation height; Step S62, the propulsion system drives the excavation unit to move upward to the upper position, the swing arm cylinder drives the cutting part to swing outward to the inner position, and the cutting part performs a first excavation under the drive of the rotary drive device; Step S63, the propulsion system drives the excavation unit to move downward, the swing arm cylinder drives the cutting part to swing outward, and the cutting part performs a second excavation under the drive of the rotary drive device; Step S64, retract the swing arm cylinder, and the vertical motion system drives the tunnel boring machine to move upward, and repeat steps S62 and S63.

2. The construction method of underground vertical coal bunker according to claim 1, characterized in that: The vertical movement system includes a pressure-lifting device and a wall protection pipe segment system. The wall protection pipe segment system includes a pipe segment. The tunnel boring machine is installed on the pipe segment. The pressure-lifting device is connected to the pipe segment and can lock the pipe segment or drive the pipe segment to move vertically.

3. The construction method of underground vertical coal bunker according to claim 2, characterized in that: The pressure-lifting device includes a fixed oil cylinder, a step-changing oil cylinder and a propulsion cylinder. The fixed oil cylinder and the step-changing oil cylinder can be independently locked with the pipe section or separated from the pipe section. The propulsion cylinder is connected to the step-changing oil cylinder and can lock the step-changing oil cylinder or drive the step-changing oil cylinder to move vertically.

4. The construction method of an underground vertical coal bunker according to any one of claims 1 to 3, characterized in that: The tunnel boring machine comprises a propulsion system and an excavation unit. The excavation unit is installed on the propulsion system. The propulsion system can drive the excavation unit to move vertically. The propulsion system is installed on the vertical motion system.

5. The construction method of underground vertical coal bunker according to claim 4, characterized in that: The propulsion system includes a pushing and fixing device, a pushing cylinder and a sliding leg. The pushing and fixing device is installed on the vertical motion system. The pushing cylinder is connected to the sliding leg and can drive the sliding leg to move vertically relative to the pushing and fixing device. The excavation unit is installed on the sliding leg.

6. The construction method of underground vertical coal bunker according to claim 5, characterized in that: The tunnel boring machine comprises a plurality of circumferentially distributed propulsion systems, wherein the propulsion systems are arranged between the excavation unit and the vertical motion system.

7. An underground vertical coal bunker excavation system, characterized in that: A construction method for an underground vertical coal bunker according to any one of claims 1 to 6, wherein the underground vertical coal bunker excavation system comprises: a tunneling machine and a vertical motion system, wherein the tunneling machine is used for excavation, the tunneling machine is installed on the vertical motion system, and the vertical motion system can drive the tunneling machine to move vertically; The tunnel boring machine comprises a propulsion system and an excavation unit. The excavation unit is installed on the propulsion system. The propulsion system can drive the excavation unit to move vertically. The propulsion system is installed on the vertical motion system.

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