Method for controlling crossheading well surrounding rock of working face in comprehensive mechanized mining of vertical groove coal

Abstract

The invention relates to the technical field of coal mine pressure and surrounding rock control, in particular to a method for controlling surrounding rock of a crossheading well of a comprehensive mechanized mining working face of vertical channel coal. A crossheading well is constructed in coal seams on the two sides of a vertical groove coal working face through a raise-boring construction technology, a crossheading well protection area is constructed on the side, close to the crossheading well, of a goaf, anchor cable reinforcement and high-water material filling are conducted on a top plate and a bottom plate in the protection area, and cementing materials are injected into the goaf outside the protection area for filling. The top and bottom plates are subjected to top cutting according to preset sections, high-strength cementing materials are filled after bottom cutting, a rock pillar isolation layer is formed after solidification, and stress transfer of the upper goaf is blocked. And working face stoping, protection area construction, reinforcement and goaf filling are repeated till stoping of the whole working face is completed.

Description

Technical Field

[0001] This invention relates to the field of coal mine pressure and surrounding rock control technology, and is a method for controlling the surrounding rock in the roadway of a vertical coal seam fully mechanized mining face. Background Technology

[0002] Currently, the support for roadways in gently dipping coal seams is mainly based on the "New Austrian Tunneling Method" (NATM), which uses a combination of bolt (cable) and mesh support. If soft rock or geological structural zones are encountered, bolt (cable) combined with I-beam frame canopies are often used for reinforced support. For roadways with easily weathered surrounding rock and severe spalling, shotcrete sealing is used, or bolt (cable) combined with retractable U-shaped steel support is used.

[0003] Patent document CN120520629A relates to the field of shaft support equipment technology, specifically disclosing an anchor cable and shaft support structure, including an anchor head, a connector, and an anchor plate. The anchor head is embedded in an anchor hole, and the anchor plate is located outside the anchor hole. The connector connects the anchor head and the anchor plate. The anchor head includes an anchor body with an internal cavity, an elastic air bladder, and several anchor shells wrapped around the anchor body. The elastic air bladder is located in the cavity, and the portion between it and the inner wall of the anchor head is filled with anchoring fluid. Several overflow holes are arranged in a ring array on the anchor body, and a first film is provided on the overflow holes. Several elongated holes are arranged in a ring array on the anchor body, and a second film is provided on the elongated holes. The shaft support structure includes an anchor cable, an inner lining ring, and an anchor mesh. Several inner lining rings are arranged at intervals inside the shaft, and an anchor mesh is laid between the several inner lining rings and the shaft. The anchor plate of the anchor cable is connected to the inner lining ring. It solves the problems of complicated procedures, high support costs, and low construction efficiency in existing vertical shaft support construction.

[0004] Patent document CN220978059U discloses an ultra-deep shaft support structure for steep rock slopes. It includes anchor blocks installed on the excavated slope, which, in conjunction with prestressed anchor cables, anchor unstable rock and soil on the excavated slope. An active protective net is installed on the upper natural slope of the excavated slope. The anchor blocks, anchor cables, and active protective net form the initial support of the support structure. Multiple steel pipe piles are installed at the upper slope elevation along the slope position, arranged side-by-side. A capping beam is installed at the top of each steel pipe pile for connection and fixation. An upward-turning retaining wall is installed at the top of the capping beam to prevent soil and rock from falling. The steel pipe piles, capping beam, and upward-turning retaining wall form the secondary support of the support structure. This utility model provides a solution to the technical problems in the field of deep foundation pit and high slope support structures, such as the inability to use large machinery for construction, low safety of shaft structures, the tendency of traditional construction methods to produce many joints leading to quality problems, long construction time, and low efficiency.

[0005] Patent document CN117189121A discloses a method for supporting a mine shaft under complex geological conditions in underground mines, including the following steps: S1. Shaft construction; S2. Shaft lining fabrication; S3. Installation of the steel structure at the bottom of the shaft; S4. Shaft lining installation; S5. Filling and reinforcement. This technical solution's support method involves two steps: shaft lining fabrication and installation, and filling the support area between the shaft wall and the shaft lining. It effectively overcomes the shortcomings and weaknesses of traditional shaft support methods, such as difficulties and poor support effects. It boasts high construction efficiency, achieving support strength with a single filling, eliminating the need for complex multiple reinforcements and maintenance. It has high applicability in underground mines, significantly extending the service life of the shaft and reducing the operating costs of mining enterprises. It also avoids the high safety risks associated with drilling operations in existing shaft support operations, such as drilling rig vibration causing rock wall collapse, greatly improving the safety of shaft support personnel.

[0006] Problems exist with existing technology: For roadway support in steeply inclined coal seams with an inclination angle of less than 60°, anchor bolts (cables) combined with I-beams or U-shaped steel are commonly used both domestically and internationally. For coal seams with an inclination angle exceeding 60°, and between 60° and 90°, no roadways arranged along the inclination direction of the coal seam have been observed so far. For coal seams with an inclination angle of 60° to 90°, the failure morphology of the roof and floor is different from that of other coal seams, especially for coal seams with a thickness of 4m to 10m. Apart from open-pit mines, such mining is rare, and the technology for protecting the surrounding rock from damage during underground mining is even rarer. Summary of the Invention

[0007] This invention provides a method for controlling the surrounding rock of the roadway in a vertical coal seam fully mechanized mining face, overcoming the shortcomings of the prior art. It can effectively solve the problems of roof and floor control and roadway protection after mining coal seams with a slope of 60° to 90°, especially for mining coal seams with a thickness of 4m to 10m.

[0008] The technical solution of this invention is achieved through the following measures: A method for controlling the surrounding rock of the roadway in a vertical coal seam mechanized mining face, comprising the following steps: The first step is to arrange the roadway shaft in the coal seam being mined, and to construct and support the roadway shaft on both sides of the vertical coal face using the reverse shaft construction technique. The second step is to set up a protection zone on the side of the goaf near the two roadway shafts during the mining process, and promptly reinforce the roof and floor within the protection zone with anchor cables and fill the protection zone. The third step is to fill the mined-out area outside the protected area with low-level foam material and high-level cementing material within a preset distance. The fourth step is to cut and blast the top and bottom plates at the pre-defined segment locations, and then grout the cut-off areas to form rock pillar isolation layers. Fifth, repeat steps two, three, and four until the surrounding rock control is completed throughout the entire working face mining process.

[0009] The following are further optimizations and / or improvements to the above-mentioned technical solution: In the first step above, the construction method for constructing the roadway well is as follows: roadway wells are arranged in the coal seams on both sides of the working face, directional drilling is completed in the coal seam using a directional drilling rig, the hole is enlarged into a roadway well using a reverse drilling rig, and then the roadway well is permanently supported and facilities are arranged in the roadway well.

[0010] The above-mentioned support method is: support by anchor bolts or / and anchor cables, anchor mesh and spraying; or / and, the facilities in the roadway are arranged as follows: at least three I-beam longitudinal columns are arranged at intervals on both sides near the top and bottom plates along the dipping direction of the coal seam in the roadway. The I-beam longitudinal columns are fixed to the top and bottom plate rock strata by anchor cables. Ring beams and horizontal steel beams are installed along the axial direction at a height that matches the preset primary mining height of the working face. The ring beams and horizontal steel beams are installed together with the corresponding I-beam longitudinal columns. Several arc-shaped plates are installed between two adjacent ring beams to form a closed cylindrical structure.

[0011] In the second step mentioned above, the protection zone is defined as follows: at a distance of 3 to 5 times the thickness of the coal seam from the working face to the center line of the roadway, the roof and floor of the protection zone are reinforced in advance and backfilled after mining to minimize the damage to the roadway caused by mining, ensure the function of the roadway, and meet the needs of safe production.

[0012] The top and bottom slabs within the aforementioned protected area are reinforced with constant resistance large deformation anchor cables, and high-water-content materials are injected into flexible membrane bags for timely filling; alternatively, secondary grouting reinforcement is carried out between the flexible membrane bags through grouting windows reserved in the shaft of the roadway.

[0013] During the mining process at the aforementioned working face, low-level backfilling was carried out in the goaf outside the protected area. The backfill material was foam, which created a sealed area above the support.

[0014] During the mining process at the aforementioned working face, high-level backfilling was carried out in the goaf outside the protected area, and the backfilling material was cementing material.

[0015] The above-mentioned working face mining, protection zone construction and goaf filling are carried out by blasting and cutting the roof and floor in pre-set sections at the working face, and filling the goaf with high-strength cementing material. After consolidation, a rock pillar isolation layer is formed to block the stress transmission of the upper goaf.

[0016] The above-mentioned goaf filling method is carried out as follows: For every 15-30m of goaf formed in the working face, the areas prone to leakage, such as the gaps between the hydraulic support and the top and bottom plates of the coal seam and the gaps between the supports, are first sealed. Then, foam filling material is used to seal the area above the hydraulic support. Finally, cementing material is injected into the goaf to be filled through high-level filling equipment to complete the filling and form the filling area. When the grouting filling height above the hydraulic support reaches 50m to 100m, the top and bottom cutting operations are carried out above the coal mining face to form the damage zone and the fracture zone. High-strength cementing material is filled into the damage zone and the fracture zone to form a self-stabilizing wall structure at the cut-off point of the top and bottom plates, increasing the firmness and stability of the isolation zone.

[0017] The above-mentioned method for filling the goaf is as follows: the hydraulic support is reserved with high and low filling holes, and two filling systems are set up. The first filling equipment is the low filling system, which is set up at the coal mining face. It relies on the filling pump to transport foam material. The transportation pipeline is relatively short and the cost is low. The second filling equipment is the high filling system, which is set up at the ground. The cementing material is transported to the goaf by gravity, which can reduce the transportation cost.

[0018] This invention involves arranging roadways within the coal seam and constructing roadways on both sides of the vertical coal face using a reverse shaft construction technique. A backfilling process is employed to fill the goaf formed during the vertical coal face mining. A roadway protection zone is constructed on the side of the goaf closest to the roadway. During the face mining process, the roof and floor within the protection zone are reinforced and backfilled with constant resistance, large deformation anchor cables. Then, the goaf outside the protection zone is entirely backfilled using cementing materials. At predetermined segment locations, the roof and floor are blasted, and simultaneously, high-strength cementing materials are used to solidify and form rock pillar isolation layers, cutting off stress transmission. This process of face mining, protection zone construction, and goaf backfilling is repeated segmentally until the entire face mining is completed. This invention addresses the control technology of roadways and surrounding rock of the roof and floor in vertical coal face mining. Through protection zone construction and goaf backfilling, it achieves "goaf retention" of the roadways, ensuring their functional integrity while serving adjacent working faces and saving engineering production costs. Attached Figure Description

[0019] Appendix Figure 1 This is a schematic diagram of the main sectional view of the support and surrounding rock structure for implementing the present invention.

[0020] Appendix Figure 2 For the appendix Figure 1 A magnified structural diagram at point A.

[0021] Appendix Figure 3 For the appendix Figure 1 Enlarged cross-sectional structural diagram of the central return airway.

[0022] Appendix Figure 4 For the appendix Figure 1Enlarged cross-sectional schematic diagram of the material transport roadway.

[0023] Appendix Figure 5 For the appendix Figure 1 Enlarged cross-sectional schematic diagram of the dedicated roadway for bank employees.

[0024] Appendix Figure 6 For the appendix Figure 1 A three-dimensional structural diagram of the material transport roadway and the pre-designated protection zone on one side.

[0025] Appendix Figure 7 For the appendix Figure 6 Schematic diagram of the enlarged local structure Figure 1 .

[0026] Appendix Figure 8 For the appendix Figure 6 Schematic diagram of the enlarged local structure Figure 2 .

[0027] Appendix Figure 9 For the appendix Figure 6 Schematic diagram of the enlarged local structure Figure 3 .

[0028] Appendix Figure 10 For the appendix Figure 6 Schematic diagram of the enlarged local structure Figure 4 .

[0029] Appendix Figure 11 For the appendix Figure 6 Schematic diagram of the enlarged local structure Figure 5 .

[0030] Appendix Figure 12 This is a three-dimensional structural diagram of the support and surrounding rock for implementing the present invention.

[0031] The codes in the attached diagram are as follows: 1 for working face, 2 for goaf, 3 for protected area, 4 for anchor cable, 5 for I-beam longitudinal column, 6 for rock strata, 7 for U-shaped steel, 8 for rock pillar isolation layer, 9 for return air roadway, 10 for material transport roadway, 11 for pedestrian roadway, 12 for connecting roadway, 13 for return air main roadway, 14 for cage, 15 for transport main roadway, 16 for rail transport roadway, 17 for coal chute, 18 for coal seam floor anchor bolt, 19 for coal seam roof anchor bolt, 20 for supporting beam, 21 for ladder compartment, 22 for drainage pipe, 23 for portal post, 24 for fiberglass anchor bolt, and 25 for pipeline network. Detailed Implementation

[0032] This invention is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this invention and the actual situation of the mine. This invention defines steeply inclined coal seams with an inclination angle of 60° to 90° as "vertical seam coal". The roadways arranged along the inclination direction of vertical seam coal are called roadway shafts, which are divided into return air roadway shafts and transport roadway shafts according to their function. A dedicated pedestrian roadway shaft is set at a distance of 20-30m on the other side of the transport roadway shaft. The transport roadway shaft and the dedicated pedestrian roadway shaft are connected by connecting roadways with a spacing of 5-10m.

[0033] In this invention, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.

[0034] The present invention will be further described below with reference to embodiments and accompanying drawings: Example 1, as shown in the attached document Figure 1 , 2 As shown in Figures 6, 7, 8, 9, 10, 11, and 12, the method for controlling the surrounding rock in the roadway of this vertical coal seam fully mechanized mining face is carried out according to the following steps: The first step is to arrange the roadway shaft in the coal seam being mined. Using the reverse shaft construction technique, roadway shafts are constructed and supported on both sides of the vertical coal face 1. The second step is to set up a protection zone 3 on the side of the goaf 2 near the two roadway shafts during the mining process. Anchor cable reinforcement is carried out on the top and bottom plates within the protection zone 3 in a timely manner, and the protection zone 3 is filled. The third step is to fill the mined-out area 2 outside the protected area 3 with low-level foam material and high-level cementing material within a preset distance. The fourth step is to cut and blast the top and bottom plates at the preset segment positions, and grout the cut-off area 2 to form a rock column isolation layer 8. Fifth, repeat steps two, three, and four until the surrounding rock control is completed throughout the entire working face mining process.

[0035] Example 2, as shown in the attached document Figure 1 , 3 As shown in Figures 4 and 5, as an optimization of the above embodiment, the construction method for constructing the roadway well in the first step is as follows: roadway wells are arranged in the coal seams on both sides of the working face, directional drilling is completed in the coal seam using a directional drilling rig, the hole is enlarged into a roadway well using a reverse drilling rig, and then the roadway well is permanently supported and facilities are arranged in the roadway well.

[0036] Example 3, as shown in the appendix Figure 1 , 2As shown in 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12, as an optimization of the above embodiments, the support method is: anchor bolts or / and anchor cables 4, and the anchor mesh spraying support is provided; or / and the facilities in the roadway are arranged as follows: at least three I-beam longitudinal columns 5 are arranged at intervals on both sides near the top and bottom plates along the dipping direction of the coal seam in the roadway. The I-beam longitudinal columns 5 are fixed to the top and bottom plate rock strata by anchor cables 4. Ring beams and horizontal steel beams are installed along the axial direction at a height matching the preset primary mining height of the working face 1. The ring beams and horizontal steel beams are installed together with the corresponding I-beam longitudinal columns. Several arc-shaped plates are installed between two adjacent ring beams to form a closed cylindrical structure.

[0037] Example 4, as shown in the appendix Figure 1 , 2 As shown in 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12, as an optimization of the above embodiment, in the second step, the scope of the protection zone 3 is divided as follows: at a distance of 3 to 5 times the coal seam thickness from the center line of the working face 1 to the roadway centerline, the roof and floor of the protection zone 3 are reinforced in advance and backfilled after mining to minimize the damage to the roadway caused by mining, ensure the function of the roadway, and meet the needs of safe production.

[0038] Example 5: As an optimization of the above examples, the top and bottom plates of the protected area are reinforced with constant resistance large deformation anchor cables, and high water content materials are injected into the flexible membrane bags for timely filling; or, secondary grouting reinforcement is carried out between the flexible membrane bags through the grouting windows reserved in the well shaft.

[0039] Example 6: As an optimization of the above examples, during the mining process of working face 1, the goaf outside the protected area 2 is filled with low-level filling material, which is foam, so that a sealed area is formed above the support.

[0040] Example 7: As an optimization of the above examples, during the mining process of working face 1, the goaf outside the protected area 2 is filled at a high level, and the filling material is a cementing material.

[0041] Example 8, as shown in the appendix Figure 1 , 6 As shown, as an optimization of the above embodiment, the working face mining, protection zone construction and goaf filling are carried out by blasting and cutting the top and bottom plates in the working face in a pre-set segment. The goaf after cutting is filled with high-strength cementing material and solidified to form a rock pillar isolation layer 8, which blocks the stress transmission of the upper goaf.

[0042] Example 9, as shown in the appendix Figure 1 , 6As shown, as an optimization of the above embodiment, the working face 1 is mined, the protection zone 3 is constructed, and the goaf 2 is filled. The roof and floor plates are blasted and cut off in the working face 1 in a pre-set segment. The goaf 2 after cutting off is filled with high-strength cementing material. After consolidation, a rock pillar isolation layer 8 is formed to block the stress transmission of the upper goaf.

[0043] Example 10, as shown in the appendix Figure 1 , 6 As shown, as an optimization of the above embodiment, the filling method of goaf 2 is as follows: every 15-30m of goaf formed in working face 1, the areas prone to leakage of liquid are first sealed in the gaps between the hydraulic support and the top and bottom plates of the coal seam and the gaps between the supports. Then, the area above the hydraulic support is sealed with filling foam material. Finally, cementing material is injected into the goaf 2 to be filled through high-level filling equipment to complete the filling and form a filling area. When the grouting filling height above the hydraulic support reaches 50m to 100m, the top and bottom cutting operations are carried out above the coal mining face to form a damaged area and a fractured area. High-strength cementing material is filled into the damaged area and the fractured area to form a self-stabilizing wall structure at the cut-off point of the top and bottom plates, increasing the firmness and stability of the isolation area.

[0044] Example 11: As an optimization of the above examples, the filling method for goaf 2 is as follows: the hydraulic support is reserved with high and low filling holes, and two filling systems are set up. The first filling equipment is a low-level filling system, which is set up at the coal mining face and relies on a filling pump to transport foam material. The conveying pipeline is short and the cost is low. The second filling equipment is a high-level filling system, which is set up on the ground. The cementing material is transported to goaf 2 by gravity, which can reduce the transportation cost.

[0045] As attached Figure 1 As shown, in this invention, the roadway includes a return air roadway 9 and a material transport roadway 10. The return air roadway 9 is located on the left side of the vertical coal mining face 1, and the material transport roadway 10 is located on the right side of the vertical coal mining face 1. To the right of the material transport roadway 10 is a dedicated pedestrian roadway 11. The material transport roadway 10 and the dedicated pedestrian roadway 11 are connected by several connecting roadways 12. A main return air roadway 13 is located above the goaf 2. Below the coal seam working face 1, there are a main transport roadway 15 and a track transport roadway 16, which are connected to the return air roadway 9, the material transport roadway 10, and the dedicated pedestrian roadway 11. Two coal chutes 17 are provided within the coal seam working face 1.

[0046] As attached Figure 2 As shown, in this invention, the protected area 3 is connected to the coal seam floor by a number of coal seam floor anchor bolts 18, and the protected area 3 is connected to the coal seam roof by a number of coal seam roof anchor bolts 19.

[0047] As attached Figure 3As shown, in this invention, a supporting beam 20 is installed in the return air roadway 9, and at least one ladder room 21 and a drainage pipe 22 are provided in the return air roadway 9. Doorposts 23 are provided on both sides near the coal seam. The I-beam longitudinal column 5 in the return air roadway 9 is connected to the rock stratum 6 by anchor cable 4. The metal mesh is connected to the rock stratum 6 and the coal seam by fiberglass anchor rods 24.

[0048] As attached Figure 4 As shown, in this invention, a supporting beam 20 is installed inside the material transport roadway 10. The material transport roadway 10 is provided with at least one row of ladders 21, drainage pipes 22 and pipe network 25. A cage 14 is installed inside the material transport roadway 10. Doorposts 23 are provided on both sides near the coal seam. The I-beam longitudinal columns 5 inside the material transport roadway 10 are connected to the rock stratum 6 by anchor cables 4. The metal mesh is connected to the rock stratum 6 and the coal seam by fiberglass anchor rods 24.

[0049] As attached Figure 5 As shown, in this invention, a supporting beam 20 is installed in the pedestrian-only roadway 11, and at least one ladder compartment 21 and a drainage pipe 22 are provided in the pedestrian-only roadway 11. A cage 14 is installed in the pedestrian-only roadway 11, and gateposts 23 are provided on both sides near the coal seam. The I-beam longitudinal columns 5 in the pedestrian-only roadway 11 are connected to the rock stratum 6 by anchor cables 4, and the metal mesh is connected to the rock stratum 6 and the coal seam by fiberglass anchor rods 24.

[0050] The above technical features constitute various embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A method for controlling the surrounding rock in the roadway of a vertical coal seam fully mechanized mining face, characterized in that... Follow these steps: The first step is to arrange the roadway shaft in the coal seam being mined, and to construct and support the roadway shaft on both sides of the vertical coal face using the reverse shaft construction technique. The second step is to set up a protection zone on the side of the goaf near the two roadway shafts during the mining process, and promptly reinforce the roof and floor within the protection zone with anchor cables and fill the protection zone. The third step is to fill the mined-out area outside the protected area with low-level foam material and high-level cementing material within a preset distance. The fourth step is to cut and blast the top and bottom plates at the pre-defined segment locations, and then grout the cut-off areas to form rock pillar isolation layers. Fifth, repeat steps two, three, and four until the surrounding rock control is completed throughout the entire working face mining process.

2. The method for controlling the surrounding rock of the roadway in a vertical coal seam fully mechanized mining face according to claim 1, characterized in that... In the first step, the construction method for constructing the roadway well is as follows: roadway wells are arranged in the coal seams on both sides of the working face. A directional drilling rig is used to complete the directional drilling in the coal seam. A reverse drilling rig is used to enlarge the hole into a roadway well. Then, the roadway well is permanently supported and facilities are arranged in the roadway well.

3. The method for controlling the surrounding rock of the roadway in a vertical coal seam fully mechanized mining face according to claim 2, characterized in that... The support method is as follows: support is provided by anchor bolts or / and anchor cables, anchor mesh and spraying; or / and the facilities in the roadway are arranged as follows: at least three I-beam longitudinal columns are arranged at intervals on both sides near the top and bottom plates along the dipping direction of the coal seam in the roadway. The I-beam longitudinal columns are fixed to the top and bottom rock strata by anchor cables. Ring beams and horizontal steel beams are installed along the axial direction at a height that matches the preset primary mining height of the working face. The ring beams and horizontal steel beams are installed together with the corresponding I-beam longitudinal columns. Several arc plates are installed between two adjacent ring beams to form a closed cylindrical structure.

4. The method for controlling the surrounding rock of the roadway in a vertical coal seam fully mechanized mining face according to claim 1, 2, or 3, characterized in that... In the second step, the protected area is delineated: at a distance of 3 to 5 times the thickness of the coal seam at the center line of the working face, the roof and floor of the protected area are reinforced in advance and backfilled after mining.

5. The method for controlling the surrounding rock of the roadway in a vertical coal seam fully mechanized mining face according to claim 1 or 4, characterized in that... The top and bottom slabs within the protected area are reinforced with constant resistance large deformation anchor cables, and high-water-content materials are injected into flexible membrane bags for timely filling; or, secondary grouting reinforcement is carried out between the flexible membrane bags through grouting windows reserved in the well shaft.

6. The method for controlling the surrounding rock of the roadway in a vertical coal seam fully mechanized mining face according to claim 1 or 4, characterized in that... During the mining process at the working face, the goaf outside the protected area is filled with low-level filling material, which is foam, to form a sealed area above the support.

7. The method for controlling the surrounding rock of the roadway in a vertical coal seam fully mechanized mining face according to claim 1 or 4, characterized in that... During the mining process at the working face, high-level backfilling is carried out in the goaf outside the protected area, and the backfilling material is cementing material.

8. The method for controlling the surrounding rock of the roadway in a vertical coal seam fully mechanized mining face according to claim 1 or 4, characterized in that... The process involves mining the working face, constructing the protected area, and filling the goaf. The roof and floor are blasted and cut off in pre-defined sections at the working face. The goaf after cutting is filled with high-strength cementing material and solidified to form a rock pillar isolation layer, which blocks the stress transmission of the upper goaf.

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