Large-mining-height working face temporary working space enclosure system and enclosure method

Abstract

The invention discloses a temporary operation space enclosure system for a large-mining-height working face. The temporary operation space enclosure system comprises a waste rock blocking support, a formwork hanging support and a plurality of end supports. The multiple end supports are arranged in an entry retaining end area in rows and located on one side of a working face, the gangue blocking support is arranged behind the third end support and the fourth end support, and the formwork hanging support is located behind the second end support. The large-mining-height working face temporary operation space enclosure system ensures that the surrounding rock of the operation space is stable during entry retaining, and ensures the safety of constructors in the operation space.

Description

Technical Field

[0001] This invention belongs to the field of coal mine goaf support technology, specifically relating to a temporary working space enclosure system for high mining height working faces, and also to a temporary working space enclosure method for high mining height working faces. Background Technology

[0002] Coal constitutes a large proportion of the energy mix. In 2021, it still accounted for more than half of energy consumption. With the continued implementation of energy conservation and emission reduction policies, coal consumption has steadily increased since 2016, and is projected to exceed 4.3 billion tons in 2022. It is foreseeable that coal will continue to dominate the energy consumption structure until 2030. Furthermore, with the accelerating pace of economic development, the demand for coal resources will also increase, leading to a growing contradiction between coal demand and coal reserves. Most mining areas still use the method of leaving wide coal pillars to resist stress disturbances and maintain roadway stability, which exacerbates the waste of a large amount of high-quality coal resources. Therefore, how to achieve stable control of the surrounding rock in roadways under the premise of green, efficient, and safe mining of coal resources has become a new challenge facing the coal industry. The proposed technology of pillarless mining with roadway retention along the goaf effectively solves this problem, and its mining method and technology are well aligned with current long-term strategic goals. By constructing roadway-side filling bodies along the edge of the goaf to implement goaf retention, not only is the problem of tight mining succession alleviated, but the reused roadway is also placed in a low-stress environment, which to a certain extent ensures the stability of the surrounding rock. For the application of goaf retention in high-extraction working faces, due to the height of the working face and the more complex stress, ensuring the stability of the surrounding rock in the temporary working space is the key to ensuring the smooth implementation of goaf retention in high-extraction working faces. Summary of the Invention

[0003] The first objective of this invention is to provide a temporary working space protection system for high mining faces, ensuring the stability of the surrounding rock in the working space during the roadway retention period and guaranteeing the safety of construction personnel in the working space.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: a temporary working space protection system for high mining face, including a rock-blocking support, a formwork support, and multiple end supports; multiple end supports are arranged in a row in the end area of ​​the roadway, located on one side of the working face, the rock-blocking support is arranged after the third and fourth end supports, and the formwork support is located after the second end support.

[0005] The technical solution of the present invention also has the following characteristics:

[0006] Lay netting in front of the frame with multiple end supports.

[0007] Anchor bolts and anchor cables are installed in front of the end support frame.

[0008] In the end area of ​​the roadway, a rock-blocking support, a formwork support, and multiple end supports are arranged. The multiple end supports are arranged in a row in the end area of ​​the roadway, located on one side of the working face. The rock-blocking support is arranged after the second and third end supports, and the formwork support is located after the second end support. With each cut of the working face, a net is laid above the multiple end supports and anchor bolts or anchor cables are installed. Then, the multiple end supports move forward one step, and the rock-blocking support and the formwork support also move one step accordingly. After the formwork support moves one step, a flexible formwork is formed by casting the formwork.

[0009] The second objective of this invention is to provide a temporary working space protection method for high mining faces, ensuring the stability of the surrounding rock of the working space during the roadway retention period and guaranteeing the safety of construction personnel in the working space.

[0010] To achieve the above objectives, the technical solution adopted by this invention is: a temporary working space enclosure method for high-extraction working faces, comprising: arranging rock-blocking supports, formwork supports, and multiple end supports in the end area of ​​the roadway; the multiple end supports are arranged in a row in the end area of ​​the roadway, located on one side of the working face, the rock-blocking supports are arranged after the second and third end supports, and the formwork supports are located after the second end support; with each cut of the working face, a mesh is laid above the multiple end supports and anchor bolts or anchor cables are installed, then the multiple end supports move forward one step, the rock-blocking supports and the formwork supports also move one step accordingly, and after the formwork supports move one step, a flexible formwork is formed by casting a template.

[0011] The technical solution of the present invention also has the following characteristics: The temporary working space enclosure method for high-extraction mining operations shall be implemented according to the following steps: Step 1: When implementing the equipment layout of the working face with the roadway retained, the end support is placed in the end area of ​​the roadway retained, the rock-blocking support is placed after the third end support and the fourth end support, and the formwork hanging device is placed after the second end support. Step 2: After one cut of the working face, begin laying a flexible mesh in front of the second of the multiple end supports, moving towards the tail of the machine, to meet the requirements of the rock-blocking support. Starting from the second end support, install anchor bolts or cables vertically to the roof between each pair of adjacent end supports. Any missing or insufficient anchor bolts or cables between the end supports are installed behind the support. Then, move the end supports forward one step. After each cut of the working face, repeat the laying of the flexible mesh and the installation of anchor bolts or cables between supports, and move the end supports forward to ensure continuous laying of the flexible mesh and continuous installation of anchor bolts or cables between supports. Step 3: As the end support moves forward one step, the rock retaining support and the formwork hanging device move forward one step in tandem with the end support; the top beam of the rock retaining support supports the roof, and the baffle on the side of the goaf protects the rock that has collapsed from the goaf from flowing into the temporary working space; the top beam of the formwork hanging device provides temporary support for the roadway roof of the temporary working space. Step 4: As the working face advances, the formwork hanging device moves forward to the space where the two flexible formworks are hung, and the hanging of the flexible formwork to be poured begins; after the flexible formwork to be poured is hung, the concrete for the flexible formwork is poured during the working face maintenance shift, and the flexible formwork to be poured is poured in one go. Step 5: When the concrete strength of the flexible formwork meets the requirements, the formwork device is removed and continues to move forward with the working face, and the temporary working space moves forward. Step 6: Repeat steps 1-5 above until the entire roadway retention work along the goaf is completed.

[0012] In step 2, the width of the mesh laid in front of the end support frame is 8 m - 12 m, and the mesh laying is continuous along the mining direction of the working face.

[0013] In step 2, the anchor bolts or anchor cables installed between the end supports are spaced 700 mm - 900 mm apart.

[0014] In step 2: the spacing of the anchor bolts or anchor cables installed between the end support frames is 1700 mm - 1800 mm.

[0015] In step 1: the length of the open ceiling between the top beam of the formwork device and the end support does not exceed 2m.

[0016] In step 4: the mold hanging device can hang a maximum of two flexible molds at a time.

[0017] The beneficial effects of the present invention are as follows: The temporary working space enclosure system and method of the present invention for high mining face adopts end supports, top plate of the end area roof anchor bolts or anchor cables, goaf retaining rock supports and hanging formwork devices to complete the temporary support of the roof after the frame is erected, which effectively ensures the stability of the surrounding rock of the temporary working space during the entire roadway retention period and ensures the safety of the construction personnel in the working space. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a plan view of a temporary working space enclosure system for a high mining face according to the present invention; Figure 2This is a cross-sectional view of a temporary working space enclosure system for a high mining face according to the present invention; Figure 3 This is a cross-sectional view of a temporary working space enclosure system for a high mining face according to the present invention.

[0019] In the diagram, 1. Working face, 2. End support, 3. Formwork hanging device, 4. Rockfill support, 5. Goaf roadway, 6. Flexible formwork to be poured, 7. Roadway wall, 8. Goaf area, 9. Roadway roof, 10. Anchor bolt or anchor cable, 11. Flexible net, 12. Rockfill support baffle, 13. Rockfill support top beam, 14. Formwork hanging device top beam, A. Temporary working space. Detailed Implementation

[0020] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1 like Figure 1 As shown, the present invention provides a temporary working space enclosure system for high mining faces, comprising a combined enclosure system of multiple subsystems such as an end support enclosure system, an end support frame rear top plate enclosure system, a rock retaining support enclosure system, and a formwork hanging device enclosure system, thereby ensuring the safety of the temporary working space.

[0022] The end support system consists of multiple end supports 2 arranged in the end area of ​​the working face. The end supports 2 are four-column support supports. The strength of the supports meets the support requirements and prevents the roof of the goaf from collapsing after the working face is mined.

[0023] The roof support system after the end supports are erected includes the working face pushing mining process. Starting in front of the second end support, a flexible net 11 is laid in front of the support towards the tail of the machine. The width of the net is 8 m - 10 m to meet the requirements of the rock-blocking support. Anchor cables are installed between the second and third end supports, anchor bolts 10 are installed between the third and fourth end supports, and anchor bolts (cables) are installed between the fourth and fifth end supports. The spacing is 700 mm - 900 mm and the row spacing is 1700 mm - 1800 mm. After the end supports are moved forward, the roof support safety is ensured.

[0024] The rock-blocking support system includes rock-blocking supports 4 arranged behind the third and fourth end supports of the roadway working face, close to the goaf side. The top beams 13 of the rock-blocking supports reinforce the roof of the goaf to ensure that the roof does not collapse. The rock-blocking support baffles 12 on the side of the goaf of the rock-blocking supports 4 protect the rock from falling rocks from the goaf and prevent them from flowing into the temporary working space.

[0025] The formwork enclosure system includes a formwork device 3 arranged behind the second end support. The formwork device 3 has the functions of formwork hanging and temporary support. The top beam of the formwork device is used to strengthen the support of the top plate of the temporary work space, reducing the length of the empty top plate between the temporary work space and the end support (transition support), and better ensuring the safety of the temporary work space.

[0026] During operation, as the working face 1 makes one cut, a flexible net 11 is laid on top of multiple end supports 2 and anchor rods 10 or anchor cables are installed. Then, the multiple end supports 2 move forward one step, and the rock-blocking support 4 and the hanging form support 3 also move one step accordingly. After the hanging form support 3 moves one step, the flexible formwork is formed by casting through the template.

[0027] Example 2 The present invention provides a method for temporary working space protection at high mining heights, which is implemented according to the following steps: Step 1: When implementing the equipment layout of the working face 1 with the roadway left open, the end support 2 is arranged in the end area of ​​the roadway left open according to the design of the supporting drawings of the working face. The rock-blocking support 4 is arranged after the third end support and the fourth end support. The formwork hanging device 3 is arranged after the second end support. Step 2: After one cut of mining on working face 1, a flexible net 11 is laid in front of the machine tail section, starting before the second end support 2 among multiple end supports. The net width is 8m, meeting the requirements for the rock-blocking support. Starting from the second end support, anchor bolts 10 or anchor cables are driven vertically into the roof between each pair of adjacent end supports, with a spacing of 700 mm and a row spacing of 1700 mm. Any missing or insufficient anchor bolts 10 or anchor cables between end supports 2 are added behind the support. Then, the end support 2 is moved forward one step. After each cut of mining on working face 1, the laying of flexible net 11 and the driving of anchor bolts 10 or anchor cables between supports are repeated, and the end support 2 is moved forward. This ensures that the flexible net 11 is laid continuously and the anchor bolts 10 or anchor cables between supports are driven continuously. Step 3: As the end support 2 moves forward one step, the rock-blocking support 4 and the formwork hanging device 3 move forward one step in quick succession. The top beam 13 of the rock-blocking support supports the roof, and the baffle 12 on the side of the goaf 8 prevents the rock from collapsing into the temporary working space A. The top beam 14 of the formwork hanging device 3 provides temporary support for the roadway roof 9 of the temporary working space A, ensuring that the length of the open roof between the formwork hanging device 3 and the end support 2 does not exceed 2m, thus ensuring the safety of the temporary working space A. Step 4: As the working face 1 is pushed forward, the formwork hanging device 3 moves forward to the space where the two flexible formworks are hung, and the hanging of the flexible formwork 6 to be poured begins, with two formworks being hung at a time; after the flexible formwork 6 to be poured is hung, the flexible formwork concrete is poured during the working face maintenance shift, and the two flexible formwork 6 to be poured are poured at once. Step 5: When the concrete strength of the flexible formwork meets the requirements, the formwork device 3 is demolded and continues to move forward with the working face 1, and the temporary working space A moves forward. Step 6: Repeat steps 1-5 above until the entire roadway retention work along the goaf is completed.

[0028] Example 3 The present invention provides a method for temporary working space protection at high mining heights, which is implemented according to the following steps: Step 1: When implementing the equipment layout of the working face 1 with the roadway left open, the end support 2 is arranged in the end area of ​​the roadway left open according to the design of the supporting drawings of the working face. The rock-blocking support 4 is arranged after the third end support and the fourth end support. The formwork hanging device 3 is arranged after the second end support. Step 2: After one cut of mining on working face 1, a flexible net 11 is laid in front of the machine tail section of the second end support 2, with a width of 12m, to meet the requirements of the rock-blocking support. Starting from the second end support, anchor bolts 10 or anchor cables are driven vertically into the roof between each pair of adjacent end supports at a spacing of 900mm and a row spacing of 1800mm. Any missing or insufficient anchor bolts 10 or anchor cables between end supports 2 are added behind the support. Then, the end support 2 is moved forward one step. After each cut of mining on working face 1, the laying of flexible net 11 and the driving of anchor bolts 10 or anchor cables between supports are repeated, and the end support 2 is moved forward. This ensures that the flexible net 11 is laid continuously and the anchor bolts 10 or anchor cables between supports are driven continuously. Step 3: As the end support 2 moves forward one step, the rock-blocking support 4 and the formwork hanging device 3 move forward one step in quick succession. The top beam 13 of the rock-blocking support supports the roof, and the baffle 12 on the side of the goaf 8 prevents the rock from collapsing into the temporary working space A. The top beam 14 of the formwork hanging device 3 provides temporary support for the roadway roof 9 of the temporary working space A, ensuring that the length of the open roof between the formwork hanging device 3 and the end support 2 does not exceed 2m, thus ensuring the safety of the temporary working space A. Step 4: As the working face 1 is pushed forward, the formwork hanging device 3 moves forward to the space where the two flexible formworks are hung, and the hanging of the flexible formwork 6 to be poured begins, with two formworks being hung at a time; after the flexible formwork 6 to be poured is hung, the flexible formwork concrete is poured during the working face maintenance shift, and the two flexible formwork 6 to be poured are poured at once. Step 5: When the concrete strength of the flexible formwork meets the requirements, the formwork device 3 is demolded and continues to move forward with the working face 1, and the temporary working space A moves forward. Step 6: Repeat steps 1-5 above until the entire roadway retention work along the goaf is completed.

[0029] Example 4 The present invention provides a method for temporary working space protection at high mining heights, which is implemented according to the following steps: Step 1: When implementing the equipment layout of the working face 1 with the roadway left open, the end support 2 is arranged in the end area of ​​the roadway left open according to the design of the supporting drawings of the working face. The rock-blocking support 4 is arranged after the third end support and the fourth end support. The formwork hanging device 3 is arranged after the second end support. Step 2: After one cut of mining on working face 1, a flexible net 11 is laid in front of the machine tail section of the second end support 2, with a width of 8m, to meet the requirements of the rock-blocking support. Starting from the second end support, anchor bolts 10 or anchor cables are driven vertically into the roof between each pair of adjacent end supports at a spacing of 900mm and a row spacing of 1700mm. Any missing or insufficient anchor bolts 10 or anchor cables between end supports 2 are added behind the support. Then, the end support 2 is moved forward one step. After each cut of mining on working face 1, the laying of flexible net 11 and the driving of anchor bolts 10 or anchor cables between supports are repeated, and the end support 2 is moved forward. This ensures that the flexible net 11 is laid continuously and the anchor bolts 10 or anchor cables between supports are driven continuously. Step 3: As the end support 2 moves forward one step, the rock-blocking support 4 and the formwork hanging device 3 move forward one step in quick succession. The top beam 13 of the rock-blocking support supports the roof, and the baffle 12 on the side of the goaf 8 prevents the rock from collapsing into the temporary working space A. The top beam 14 of the formwork hanging device 3 provides temporary support for the roadway roof 9 of the temporary working space A, ensuring that the length of the open roof between the formwork hanging device 3 and the end support 2 does not exceed 2m, thus ensuring the safety of the temporary working space A. Step 4: As the working face 1 is pushed forward, the formwork hanging device 3 moves forward to the space where the two flexible formworks are hung, and the hanging of the flexible formwork 6 to be poured begins, with two formworks being hung at a time; after the flexible formwork 6 to be poured is hung, the flexible formwork concrete is poured during the working face maintenance shift, and the two flexible formwork 6 to be poured are poured at once. Step 5: When the concrete strength of the flexible formwork meets the requirements, the formwork device 3 is demolded and continues to move forward with the working face 1, and the temporary working space A moves forward. Step 6: Repeat steps 1-5 above until the entire roadway retention work along the goaf is completed.

[0030] Example 5 The present invention provides a method for temporary working space protection at high mining heights, which is implemented according to the following steps: Step 1: When implementing the equipment layout of the working face 1 with the roadway left open, the end support 2 is arranged in the end area of ​​the roadway left open according to the design of the supporting drawings of the working face. The rock-blocking support 4 is arranged after the third end support and the fourth end support. The formwork hanging device 3 is arranged after the second end support. Step 2: After one cut of mining on working face 1, a flexible net 11 is laid in front of the machine tail section of the second end support 2, with a width of 12m, to meet the requirements of the rock-blocking support. Starting from the second end support, anchor bolts 10 or anchor cables are driven vertically into the roof between each pair of adjacent end supports, with a spacing of 700 mm and a row spacing of 1700 mm. Any missing or insufficient anchor bolts 10 or anchor cables between end supports 2 are added behind the support. Then, the end support 2 is moved forward one step. After each cut of mining on working face 1, the laying of flexible net 11 and the driving of anchor bolts 10 or anchor cables between supports are repeated, and the end support 2 is moved forward. This ensures that the flexible net 11 is laid continuously and the anchor bolts 10 or anchor cables between supports are driven continuously. Step 3: As the end support 2 moves forward one step, the rock-blocking support 4 and the formwork hanging device 3 move forward one step in quick succession. The top beam 13 of the rock-blocking support supports the roof, and the baffle 12 on the side of the goaf 8 prevents the rock from collapsing into the temporary working space A. The top beam 14 of the formwork hanging device 3 provides temporary support for the roadway roof 9 of the temporary working space A, ensuring that the length of the open roof between the formwork hanging device 3 and the end support 2 does not exceed 2m, thus ensuring the safety of the temporary working space A. Step 4: As the working face 1 is pushed forward, the formwork hanging device 3 moves forward to the space where the two flexible formworks are hung, and the hanging of the flexible formwork 6 to be poured begins, with two formworks being hung at a time; after the flexible formwork 6 to be poured is hung, the flexible formwork concrete is poured during the working face maintenance shift, and the two flexible formwork 6 to be poured are poured at once. Step 5: When the concrete strength of the flexible formwork meets the requirements, the formwork device 3 is demolded and continues to move forward with the working face 1, and the temporary working space A moves forward. Step 6: Repeat steps 1-5 above until the entire roadway retention work along the goaf is completed.

[0031] Example 6 The present invention provides a method for temporary working space protection at high mining heights, which is implemented according to the following steps: Step 1: When implementing the equipment layout of the working face 1 with the roadway left open, the end support 2 is arranged in the end area of ​​the roadway left open according to the design of the supporting drawings of the working face. The rock-blocking support 4 is arranged after the third end support and the fourth end support. The formwork hanging device 3 is arranged after the second end support. Step 2: After one cut of mining on working face 1, a flexible net 11 is laid in front of the machine tail starting before the second of the multiple end supports 2, with a net width of 10 m to meet the requirements of the rock-blocking support. Starting from the second end support, anchor bolts 10 or anchor cables are driven vertically into the roof between each pair of adjacent end supports, with a spacing of 800 mm and a row spacing of 1750 mm. Any missing or insufficient anchor bolts 10 or anchor cables between end supports 2 are added behind the support. Then, the end supports 2 are moved forward one step. After each cut of mining on working face 1, the laying of flexible net 11 and the driving of anchor bolts 10 or anchor cables between supports are repeated, and the end supports 2 are moved forward. This ensures that the flexible net 11 is laid continuously and the anchor bolts 10 or anchor cables between supports are driven continuously. Step 3: As the end support 2 moves forward one step, the rock-blocking support 4 and the formwork hanging device 3 move forward one step in quick succession. The top beam 13 of the rock-blocking support supports the roof, and the baffle 12 on the side of the goaf 8 prevents the rock from collapsing into the temporary working space A. The top beam 14 of the formwork hanging device 3 provides temporary support for the roadway roof 9 of the temporary working space A, ensuring that the length of the open roof between the formwork hanging device 3 and the end support 2 does not exceed 2m, thus ensuring the safety of the temporary working space A. Step 4: As the working face 1 is pushed forward, the formwork hanging device 3 moves forward to the space where the two flexible formworks are hung, and the hanging of the flexible formwork 6 to be poured begins, with two formworks being hung at a time; after the flexible formwork 6 to be poured is hung, the flexible formwork concrete is poured during the working face maintenance shift, and the two flexible formwork 6 to be poured are poured at once. Step 5: When the concrete strength of the flexible formwork meets the requirements, the formwork device 3 is demolded and continues to move forward with the working face 1, and the temporary working space A moves forward. Step 6: Repeat steps 1-5 above until the entire roadway retention work along the goaf is completed.

Claims

1. A temporary working space enclosure system for high-extraction mining operations, characterized in that: It includes a rock-blocking support, a formwork support, and multiple end supports; the multiple end supports are arranged in a row in the end area of ​​the roadway, located on one side of the working face, the rock-blocking support is arranged after the third and fourth end supports, and the formwork support is located after the second end support.

2. The temporary working space enclosure system for high-extraction working faces according to claim 1, characterized in that, A net is laid in front of the frame of the multiple end supports.

3. The temporary working space enclosure system for high-extraction working faces according to claim 2, characterized in that, Anchor bolts and anchor cables are installed in front of the end support.

4. A temporary working space enclosure method for high-extraction mining operations, characterized in that: In the end area of ​​the roadway, a rock-blocking support, a formwork support, and multiple end supports are arranged. The multiple end supports are arranged in a row in the end area of ​​the roadway, located on one side of the working face. The rock-blocking support is arranged after the second and third end supports, and the formwork support is located after the second end support. With each cut of the working face, a mesh is laid above the multiple end supports and anchor bolts or anchor cables are installed. Then, the multiple end supports move forward one step, and the rock-blocking support and the formwork support also move one step accordingly. After the formwork support moves one step, a flexible formwork is formed by casting a template.

5. The temporary working space enclosure method for high-extraction working faces according to claim 4, characterized in that, The specific steps are as follows: Step 1: When implementing the equipment layout of the working face with the roadway retained, the end support is placed in the end area of ​​the roadway retained, the rock-blocking support is placed after the third end support and the fourth end support, and the formwork hanging device is placed after the second end support. Step 2: After one cut of the working face, begin laying a flexible mesh in front of the second of the multiple end supports, moving towards the tail of the machine, to meet the requirements of the rock-blocking support. Starting from the second end support, install anchor bolts or cables vertically to the roof between each pair of adjacent end supports. Any missing or insufficient anchor bolts or cables between the end supports are installed behind the support. Then, move the end supports forward one step. After each cut of the working face, repeat the laying of the flexible mesh and the installation of anchor bolts or cables between supports, and move the end supports forward to ensure continuous laying of the flexible mesh and continuous installation of anchor bolts or cables between supports. Step 3: As the end support moves forward one step, the rock retaining support and the formwork hanging device move forward one step in tandem with the end support; the top beam of the rock retaining support supports the roof, and the baffle on the side of the goaf protects the rock that has collapsed from the goaf from flowing into the temporary working space; the top beam of the formwork hanging device provides temporary support for the roadway roof of the temporary working space. Step 4: As the working face advances, the formwork hanging device moves forward to the space where the two flexible formworks are hung, and the hanging of the flexible formwork to be poured begins; after the flexible formwork to be poured is hung, the concrete for the flexible formwork is poured during the working face maintenance shift, and the flexible formwork to be poured is poured in one go. Step 5: When the concrete strength of the flexible formwork meets the requirements, the formwork device is removed and continues to move forward with the working face, and the temporary working space moves forward. Step 6: Repeat steps 1-5 above until the entire roadway retention work along the goaf is completed.

6. The temporary working space enclosure method for high-extraction working faces according to claim 5, characterized in that, In step 2, the width of the mesh laid in front of the end support is 8 m - 12 m, and the mesh laying is continuous along the mining direction of the working face.

7. The temporary working space enclosure method for high-extraction working faces according to claim 6, characterized in that, In step 2, the anchor bolts or anchor cables installed between the end supports are spaced 700 mm to 900 mm apart.

8. The temporary working space enclosure method for high-extraction working faces according to claim 7, characterized in that, In step 2: the spacing between the anchor bolts or anchor cables installed between the end support frames is 1700 mm - 1800 mm.

9. The temporary working space enclosure method for high-extraction working faces according to claim 8, characterized in that, In step 1: the length of the open ceiling between the top beam of the formwork device and the end support does not exceed 2m.

10. The temporary working space enclosure method for high-extraction working faces according to claim 9, characterized in that, In step 4: the mold hanging device can hang a maximum of two flexible molds at a time.

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