Multi-functional partition and double safety exit collaborative disposal method for steeply inclined fully mechanized mining roadway

Abstract

This invention discloses a multi-functional zoning and dual safety exit coordinated handling method for steeply inclined fully mechanized mining roadways, belonging to the field of coal mining technology. The method involves sequentially carrying out roadway system layout, four-zone cross-section isolation construction, lifting and bearing structure assembly, track anti-slip limiting system construction, daily management and emergency evacuation operations. Steel structure isolation panels divide the roadway into independent movable platform working areas, coal chute conveying areas, pedestrian ladder escape areas, and closed areas. A double-layer liftable working platform serves as the main safety exit, and the ladder area as an auxiliary passage, constructing a dual-channel safety redundancy system. The working platform can be raised, lowered, and leveled to connect to the connecting roadway, relying on the coal chute for gravity-fed coal conveying. This invention is suitable for steeply inclined coal seam conditions, its modular layout facilitates maintenance, reduces power equipment investment and energy consumption, balances transfer efficiency and underground operation safety, complies with coal mine safety regulations, and has good engineering application value.

Description

Technical Field

[0001] This invention relates to the field of coal mining technology, and in particular to a method for the coordinated handling of multi-functional zoning and dual safety exits in steeply inclined fully mechanized mining roadways. Background Technology

[0002] Steeply inclined coal seams refer to coal seams with a dip angle greater than 45°. As coal mining gradually extends into deeper and more complex geological areas, the safe and efficient mining of steeply inclined coal seam longwall faces has become a significant technical challenge for the coal industry. The mining roadways in steeply inclined coal seam longwall faces are laid out along the dip of the coal seam. Due to the large dip angle and limited usable cross-section, existing hoisting, transportation, and safety exit technologies have significant deficiencies, seriously affecting the safety and efficiency of mining operations.

[0003] Underground mining roadways need to simultaneously support multiple functions, including coal chuting, personnel passage, material transfer, and pipeline laying. Current methods result in a mix of these workspaces, with flying coal and gangue easily injuring workers, and falling materials blocking passageways. The crisscrossing arrangement of pipelines and transfer facilities also poses significant safety hazards. Furthermore, the "Coal Mine Safety Regulations" clearly require two continuously accessible safety exits at the coal face. However, due to the limited space in narrow roadways, traditional methods only use simple steps and fixed metal ladders as a single passageway. This structure occupies a large portion of the roadway cross-section, has weak protective capabilities, and interferes with coal chuting and material handling processes, making it impossible to build a redundant dual-exit escape system and maintain the unobstructed access of both safety exits in the long term. In addition, existing conventional hoisting and passage solutions have significant limitations in terms of personnel and material transfer and roadway connections: rail winches are prone to runaway and derailment accidents and have insufficient carrying capacity; overhead personnel carriers have poor stability at large inclination angles, allowing only limited personnel passage and failing to accommodate material transfer. Neither solution achieves integrated personnel and material transfer. Furthermore, the steeply inclined roadway and the connecting roadway have a large spatial elevation difference, and the passage and transfer of personnel and materials must detour through the auxiliary roadway, resulting in long transportation routes, long operation time, and a significant reduction in the production efficiency of the working face.

[0004] In summary, existing methods for dealing with steeply inclined coal seam mining roadways cannot simultaneously address issues such as cross-interference between multiple processes in the roadway, difficulties in setting up dual-channel safety exits, poor safety of personnel and material transfer, and low efficiency in connecting roadways. There is an urgent need to develop a multi-functional zoning and dual-safety-exit collaborative treatment method for steeply inclined fully mechanized mining roadways. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a method for the coordinated handling of multi-functional zoning and dual safety exits in steeply inclined fully mechanized mining roadways.

[0006] The technical solution adopted by this invention to solve its technical problem is: a multi-functional zoning and dual safety exit coordinated treatment method for steeply inclined fully mechanized mining roadways, applicable to fully mechanized mining roadways in steeply inclined coal seams with a dip angle greater than 45°, comprising the following steps: S1. Overall layout of the tunnel system: Construction of each shaft, main tunnel, stone gate and tunnel to build the overall tunnel system; S2. Functional Zoning and Isolation Construction of Coal Mine Roadway Cross Section: In the coal mining face transport roadway and coal mining face return air roadway of the roadway system, steel structure isolation plates are used to divide the roadway cross section into mutually isolated active plate operation area, coal chute pipeline conveying area, pedestrian ladder escape area and closed area. The movable panel working area is used to install the lifting and passage bearing structure, the coal chute pipeline is installed in the coal conveying area of ​​the coal chute well, the steel structure ladder room is installed in the pedestrian ladder room escape area, and the pipeline is centrally laid in the enclosed area. S3. Layout of the lifting and passage load-bearing structure in the roadway: A double-layer lifting working platform is set up in the working area of ​​the movable panel. The double-layer lifting working platform includes an upper platform and a lower platform. The surfaces of the upper platform and the lower platform are covered with anti-slip steel plates and equipped with guardrails. S4. Construction of track support and anti-slip limiting system: Multiple track support beams are laid out at intervals along the inclined direction of the mining roadway in the working area of ​​the movable panel. The track support beams span the cross section of the mining roadway, and the two ends of the track support beams are embedded in the surrounding rock of the roadway. The lifting track of the working platform is installed on the upper part of the track support beams. The lifting track of the working platform extends along the inclined direction of the mining roadway, and lifting limiting devices are set at both ends of the lifting track of the working platform. A rail clamping device is installed on the double-layer liftable work platform. The rail clamping device includes a guide wheel assembly and an anti-disengagement mechanism. The guide wheel assembly works with the lifting rail of the work platform to achieve lifting guidance. The anti-disengagement mechanism is used to lock the relative position of the double-layer liftable work platform and the lifting rail of the work platform. S5. Daily production collaborative operation control: During normal production operation, the double-layer liftable work platform is locked by the anti-disengagement mechanism of the rail clamping device, so that the double-layer liftable work platform is fixed at the designated position of the work platform lifting track. The upper platform of the double-layer liftable work platform is used as the main safety exit passage base plate. The work platform protective cover is closed to block the upper space of the double-layer liftable work platform and prevent the falling gangue and coal from above. When it is necessary to transfer materials or personnel to the connecting roadway and pass through the dedicated pedestrian roadway, release the anti-disengagement mechanism of the rail clamping device, drive the double-layer liftable work platform to rise and fall along the lifting track of the work platform, adjust the elevation of the upper platform to be level with the elevation of the bottom plate of the connecting roadway, and then lock the rail clamping device again to achieve unobstructed passage and transfer between the coal mining face, the mining roadway, and the connecting roadway. S6. Emergency evacuation in case of sudden work: When the main safety exit formed by the double-layer liftable work platform cannot be used normally, the workers can evacuate through the steel structure ladder room inside the independently set pedestrian ladder escape area.

[0007] Furthermore, the specific method for the overall layout of the roadway system in step S1 is as follows: construct the main shaft, auxiliary shaft, and ventilation shaft to the target coal seam elevation; construct the main transport gate, the bottom yard, and the main track gate at the bottom of the shaft; develop the first horizontal transport roadway, the first horizontal track roadway, and the return air roadway; construct the return air roadway gate I and the transport roadway gate I from the first horizontal transport roadway; construct the dedicated pedestrian roadway gate I from the first horizontal track roadway; and construct the return air roadway gate II, the transport roadway gate II, and the dedicated pedestrian roadway gate II from the return air roadway. The coal mining face is cut horizontally along the strike of the coal seam, and the coal mining face transport roadway, coal mining face return air roadway, and dedicated pedestrian roadway are constructed along the dip of the coal seam as mining roadways. The construction connecting roadway connects the coal mining face transport roadway and the dedicated pedestrian roadway. The mining face adopts the downward mining method to arrange the mining advance direction along the dip of the coal seam.

[0008] Furthermore, in step S2, the movable panel working area is arranged in the middle or on one side of the cross section of the mining roadway, and the area width of the movable panel working area matches the overall external dimensions of the double-layer liftable working platform. The coal chute pipeline well is located adjacent to the movable panel operation area on one side. The coal chute pipeline is continuously laid along the inclined direction of the mining roadway and relies on the dip angle of the coal seam to realize the gravity-driven transport of coal. The pedestrian stairwell escape area is separated from the mobile work area, and the steel structure stairwell is equipped with continuous handrails and external guardrails; The enclosed area is equipped with an openable maintenance cover, and all pipelines are housed inside the enclosed area.

[0009] Furthermore, in step S3, a protective cover for the work platform is installed on the double-layer liftable work platform. The protective cover is connected to the double-layer liftable work platform as a whole through longitudinal steel beams.

[0010] Furthermore, the protective cover for the work platform adopts a double-layer composite structure, with the upper layer being a steel wire mesh and the lower layer being a thin steel plate.

[0011] Furthermore, in step S4, a complete set of rail clamping devices is installed at the upper and lower ends of the double-layer liftable work platform, and the two sets of rail clamping devices work together synchronously to achieve dual-point locking and limiting of the double-layer liftable work platform.

[0012] Furthermore, the double-layer liftable work platform is equipped with a hydraulic lock. When the lifting drive system of the double-layer liftable work platform is powered off, the hydraulic lock can automatically lock the relative position of the double-layer liftable work platform and the lifting track of the work platform.

[0013] Furthermore, the two ends of the track support beam are embedded in the surrounding rock of the roadway to a depth of not less than 300mm, and the connection between the track support beam and the surrounding rock of the roadway is reinforced by anchor bolt and anchor cable grouting process.

[0014] Furthermore, during the construction of the steel structure ladder room inside the pedestrian ladder room escape area, a rest platform is set up every 6m-8m along the vertical height.

[0015] The beneficial effects of this invention are: 1. This plan uses steel structure isolation panels to divide the mining roadway into four independent functional zones. Within the limited cross-section of the steeply inclined roadway, it enables simultaneous operations for coal chuting, material transportation, personnel movement, and pipeline laying. Each zone is physically isolated and does not interfere with the others, avoiding potential hazards such as flying rock causing injury, material blockage, and pipeline damage, thus maximizing the utilization of roadway space. The plan constructs a dual-channel safety system consisting of a double-layer liftable work platform and an independent ladder compartment. The two safety exit spaces are completely separated; if one channel fails, the other remains operational, enhancing the redundancy of underground emergency escape safety.

[0016] 2. This solution features a double-layer, liftable working platform whose height can be adjusted along the track, connecting to the bottom of the roadway. Personnel and material transfers no longer require detouring through auxiliary roadways, shortening transport routes, saving travel time, and improving the efficiency of workface transfers. The track support beams are deeply embedded in the surrounding rock and reinforced with grout. The platform is equipped with double-set rail clamping devices at both the upper and lower ends, combined with a power-off self-locking hydraulic lock to form multiple layers of protection, solving the problem of platform slippage and derailment under steep incline conditions.

[0017] 3. In this scheme, raw coal is transported by gravity through coal chutes, reducing the need for power conveying equipment and lowering long-term energy consumption and electromechanical maintenance costs. Each functional area adopts a modular layout, with equipment and pipelines independently arranged in separate zones, providing ample space for maintenance and operation, and facilitating equipment upkeep. The entire process covers the entire workflow from roadway layout and zoned construction to equipment operation and emergency evacuation. It systematically addresses the safety shortcomings of traditional steeply inclined mining roadways through multiple safety mechanisms, comprehensively improving the safety production level of the fully mechanized mining face. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of the tunnel system in this invention.

[0019] Figure 2 This is a schematic diagram of the functional zoning of the mining roadway cross section in this invention.

[0020] Figure 3 This is a structural schematic diagram illustrating the double-layer liftable work platform in this invention.

[0021] In the diagram: 11. Main shaft; 12. Auxiliary shaft; 13. Ventilation shaft; 14. Main haulage gate; 15. Bottom yard and main track gate; 16. Main return air gate; 17. First-level haulage roadway; 18. First-level track roadway; 19. Return air roadway; 110. Return air roadway gate I; 111. Return air roadway gate II; 112. Transport roadway gate I; 113. Transport roadway gate II; 114. Dedicated pedestrian roadway gate I; 115. Dedicated pedestrian roadway gate II; 116. Coal mining face return airway; 1 17. Coal mining face transport roadway; 118. Coal mining face cut-off; 119. Dedicated pedestrian roadway; 120. Connecting roadway; 21. Track support beam; 22. Working platform hoisting track; 23. Track clamping device; 24. Coal chute; 25. Roadway surrounding rock; 26. Steel structure ladder room; 27. Pipeline; 28. Double-layer liftable working platform; 29. ​​Working platform protective cover; 31. Movable panel working area; 32. Coal chute well coal conveying area; 33. Pedestrian ladder room escape area; 34. Enclosed area. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings.

[0023] This invention discloses a method for the coordinated handling of multi-functional zoning and dual-channel safety exits in the longwall mining roadway of a steeply inclined coal seam.

[0024] Referring to the figure, a method for the coordinated handling of multi-functional zoning and dual-channel safety exits in a fully mechanized longwall mining face of steeply inclined coal seams is presented. This method is suitable for the construction and operation and maintenance of longwall mining roadways in steeply inclined longwall mining faces with a coal seam dip angle greater than 45°. It specifically addresses the long-standing technical challenges that have restricted the safe and efficient mining of steeply inclined coal seams, such as poor safety for personnel and material hoisting in traditional steeply inclined roadways, insufficient redundancy of single safety exits, cross-interference between multiple processes (coal chute / pedestrian / material transport / pipeline), poor connection between connecting roadway 120 and the longwall mining roadway, and low utilization rate of roadway space.

[0025] Specifically, the following steps are included: S1. Overall Layout of the Roadway System: This process is the foundational pre-construction stage of the entire mining system. The construction follows the excavation sequence from the shaft to the bottom of the shaft and from the horizontal main roadway to the working face roadway. First, the main shaft 11, auxiliary shaft 12, and ventilation shaft 13 are constructed until the target coal seam design elevation is reached. The shaft excavation is carried out with conventional coal mine surrounding rock support technology. Then, the main transport gate 14, the bottom yard and main track gate 15 are constructed at the bottom of the shaft, and three horizontal roadways, namely the first horizontal transport roadway 17, the horizontal track roadway and the return air roadway 19, are developed. Construct return airway gate I110 and transport airway gate I112 from the first horizontal transport roadway 17, construct dedicated pedestrian airway gate I114 from the first horizontal track roadway 18, and construct return airway gate II111, transport airway gate II113, and dedicated pedestrian airway gate II115 from the return airway 19 to achieve the connection between the horizontal system and the working face roadway; Subsequently, the coal face cut-off 118 is constructed horizontally along the coal seam strike. The coal face transport roadway 117, the coal face return air roadway 116, and the dedicated pedestrian roadway 119 are constructed along the coal seam dip as return mining roadways. Finally, the connecting roadway 120 is constructed to connect the coal face transport roadway 117 and the dedicated pedestrian roadway 119 to form a local transfer passage for the working face.

[0026] The complete roadway system for this process includes the main shaft 11, auxiliary shaft 12, ventilation shaft 13, main haulage gate 14, bottom yard and main track gate 15, main return air gate 16, first-level haulage roadway 17, first-level track roadway 18, return air roadway 19, coal face return air roadway gate 116, coal face haulage roadway gate 117, dedicated pedestrian roadway gate 119, coal face return air roadway 116, coal face haulage roadway 117, coal face cut-out 118, dedicated pedestrian roadway 119, and connecting roadway 120. After all roadway components are connected in sequence, independent and separate mine ventilation circuits, raw coal transportation lines, personnel passageways, and material transfer channels can be established, avoiding safety interference caused by the mixing of different production lines. This process limits the coal mining face to adopt a downward mining layout along the coal seam dip. The specific implementation of downward mining is that the coal mining machine advances downward along the coal seam dip from the upper part of the inclined coal mining face to complete the mining operation. This layout matches the gravity-driven characteristics of steeply inclined coal seams, which can reduce the operating load of the coal mining equipment climbing up and down, and reduce equipment wear and power consumption.

[0027] S2. Functional Zoning and Isolation Construction of Mining Roadway Cross Section: The core technical means of this process is to use steel structure isolation panels as the only separating component for the four zones. Inside the coal mining face transport roadway 117 and the coal mining face return air roadway 116, the roadway is completely divided into four independent functional areas along the roadway cross section: the movable panel operation area 31, the coal chute pipeline conveying area 32, the pedestrian ladder escape area 33, and the closed area 34. The steel structure isolation panels are fixed and sealed by anchor bolts on both sides of the roadway. There are no connecting channels between the functional areas, which can realize the independent operation of four types of operations: coal chute, pedestrian, material transportation, and pipeline 27 laying. This prevents safety interferences such as flying coal chunks injuring people, material blocking the passage, and collision and damage to pipeline 27 caused by cross-operations.

[0028] In terms of the spatial layout, the mobile work area 31 is located in the middle or on one side of the cross section of the mining roadway. The overall width of the area strictly matches the overall dimensions of the double-layer liftable work platform 28 to be assembled later, so as to reserve sufficient assembly and operation space for the lifting and passage bearing structure. The coal conveying area 32 of the coal chute is arranged on one side adjacent to the movable plate operation area 31. The coal chute 24 is continuously laid along the inclined direction of the roadway in the area. The coal gravity conveying is realized by relying on the roadway inclination angle of more than 45°. There is no need to configure additional raw coal conveying power equipment, which has the advantages of energy saving and low equipment investment. The pedestrian ladder escape area 33 and the mobile work area 31 are completely separated by a steel structure partition. The area is equipped with a steel structure ladder 26, which is equipped with continuous handrails and outer guardrails throughout. At the same time, a rest platform is set every 6m to 8m along the vertical height, which can effectively alleviate the physical fatigue caused by long-distance climbing for workers. Pipelines 27 are centrally laid within the enclosed area 34. Pipelines 27 include cables, water supply pipes, compressed air pipes, drainage pipes, and other pipeline facilities. The top of the enclosed area 34 is equipped with an openable maintenance cover. During daily production, the maintenance cover is closed to isolate pipelines 27. During maintenance operations, it can be partially opened, which not only completely isolates pipelines 27 from personnel access areas but also facilitates the maintenance and repair of pipelines 27 in the future.

[0029] S3. Layout of the lifting and passage load-bearing structure in the tunnel: A double-layer liftable work platform 28 is set up in the mobile panel work area 31. The double-layer liftable work platform 28 is divided into two load-bearing levels: an upper platform and a lower platform. The surfaces of the upper platform and the lower platform are uniformly covered with anti-slip steel plates. Anti-slip textures are pressed on the surface of the steel plates. Protective railings are integrated around the platform to ensure the stability of personnel standing and materials being stacked. A protective cover 29 is installed above the double-layer liftable work platform 28. The protective cover 29 adopts a double-layer composite structure. The upper layer is a steel wire mesh, which is mainly used to intercept large pieces of gangue falling from the roadway roof and coal chute 24. The lower layer is a thin steel plate, which is used to block broken coal and fine coal dust from splashing onto the platform area. The double-layer composite structure is designed to be lightweight to control the overall weight and avoid increasing the load on the track system. The protective cover 29 of the work platform is welded to the double-layer liftable work platform 28 as a whole through longitudinal steel beams. The protective cover 29 of the work platform can move up and down synchronously with the double-layer liftable work platform 28, and completely cover the upper space of the platform when not in operation, providing continuous protection against falling objects.

[0030] S4. Construction of Track Support and Anti-slip Limiting System: This process provides stable load-bearing, lifting guidance, and anti-slip safety for the double-layer liftable work platform 28. During construction, multiple track support beams 21 are continuously arranged along the inclined direction of the mining roadway within the working area 31 of the movable panel. The multiple track support beams 21 together form a continuous overall support system, which can ensure the overall rigidity and straightness of the lifting track 22 of the work platform installed later. Each track support beam 21 spans the complete cross section of the mining roadway. Both ends of the track support beam 21 extend into the surrounding rock 25 of the roadway, with an embedding depth of not less than 300mm. The embedding part is reinforced by anchor bolts and anchor cable grouting technology to strengthen the connection between the track support beam 21 and the surrounding rock 25 of the roadway, which can evenly transfer all the load of the platform and the load to the surrounding rock and avoid the support beam from deforming and breaking under single-point stress.

[0031] The lifting track 22 of the working platform is fixedly installed on the upper part of the track support beam 21 with high-strength bolts. The lifting track 22 of the working platform extends along the inclined direction of the mining roadway. The track gauge and track type are determined according to the full-load design load of the double-layer liftable working platform 28. At the same time, lifting limit devices are installed at both ends of the lifting track 22 of the working platform to limit the maximum upward and downward movement range of the double-layer liftable working platform 28.

[0032] A complete set of rail clamping devices 23 is installed at the upper and lower ends of the double-layer liftable work platform 28. The two sets of rail clamping devices 23 work together synchronously to achieve dual-point locking and limiting of the double-layer liftable work platform 28. Each set of rail clamping devices 23 includes a guide wheel assembly and an anti-disengagement mechanism. The guide wheel assembly and the work platform lifting rail 22 roll together to achieve smooth lifting and guiding. The anti-disengagement mechanism is used to lock the relative position of the double-layer liftable work platform 28 and the work platform lifting rail 22. At the same time, the double-layer liftable work platform 28 is equipped with a hydraulic lock. In the case of power failure or power failure of the lifting drive system of the double-layer liftable work platform 28, the hydraulic lock can automatically lock the relative position of the double-layer liftable work platform 28 and the work platform lifting rail 22. Together with the dual-point rail clamping devices 23, a double anti-slip protection is formed to prevent the risk of platform self-slippage and derailment under large tilt conditions.

[0033] S5. Daily production collaborative operation control: During normal production operations, the double-layer liftable work platform 28 is locked by the anti-disengagement mechanism of the rail clamping device 23, so that the double-layer liftable work platform 28 is fixed at the preset designated position of the work platform lifting rail 22. The upper platform of the double-layer liftable work platform 28 is used as the main safety exit passage base plate for workers to travel to and from the work face daily. At the same time, the work platform protective cover 29 is closed to cover the upper space of the double-layer liftable work platform 28, blocking the gangue and coal blocks falling from the coal chute 24 and the roadway roof above, protecting the personal safety of workers in the platform area. When the working face needs to transfer fully mechanized mining equipment and support materials to the connecting roadway 120, or when workers need to pass through the dedicated pedestrian roadway 119, the anti-disengagement mechanism of the rail clamping device 23 is released, and the lifting drive system is started to drive the double-layer liftable working platform 28 to rise and fall slightly along the working platform lifting track 22. The elevation of the upper platform is finely adjusted until it is completely level with the bottom plate elevation of the connecting roadway 120. After the elevation is aligned, the rail clamping device 23 is locked again. Personnel and materials can then pass through the double-layer liftable working platform 28 without obstacles between the coal mining face, the mining roadway, and the connecting roadway 120, without having to detour through auxiliary roadways as in traditional processes. This significantly shortens the transportation distance and improves the production and transfer efficiency of the working face.

[0034] S6. Emergency Evacuation in Sudden Working Conditions: When the main safety exit formed by the double-layer liftable work platform 28 cannot be used normally due to reasons such as lifting equipment failure, underground power outage, deformation, compression and blockage of the surrounding rock 25 in the roadway, the passage function of the main safety exit is completely ineffective. At this time, the workers can evacuate through the steel structure ladder room 26 inside the independently set pedestrian ladder room escape area 33. The steel structure ladder room 26 is completely separated from the mobile work area 31 by the steel structure isolation plate. Its operation status is not affected by the failure of the double-layer liftable work platform 28. It can continue to play the role of an independent auxiliary safety exit, and together with the main safety exit, it forms a dual-channel safety redundancy guarantee system to improve the emergency escape safety redundancy of the steeply inclined working face.

[0035] This method, when applied in the field, forms multiple supporting working mechanisms. It utilizes the coal chute 24 to transport raw coal by its own weight at a large inclination angle, eliminating the need for additional conveying power equipment. The roadway cross-section adopts a four-zone physical separation structure, completely separating the coal chute, pedestrian, material transport, and pipeline 27 laying operations, avoiding cross-interference caused by simultaneous multi-process operations. The double-layer liftable work platform 28 can adjust its height along the track, directly aligning with the bottom plate of the connecting roadway 120, simplifying the personnel and material transfer paths. The work platform passage and the steel structure ladder room 26 are arranged independently, forming two sets of non-interfering escape routes, meeting the dual-channel safety requirements of the working face. The guide wheel set and anti-disengagement mechanism of the platform work together, combined with the hydraulic lock power-off self-locking structure, effectively avoiding the safety risks of platform slippage and derailment in steep inclination roadways.

[0036] The entire process system features a simple layout, with raw coal transportation relying heavily on gravitational potential energy, reducing the number of underground electromechanical drive devices required. This reduces energy consumption and equipment maintenance costs during long-term production. Modular construction is employed for each functional area within the tunnel, with equipment and pipelines independently installed in each area. This provides ample working space for equipment maintenance and troubleshooting, and makes maintenance operations convenient and simple.

[0037] This method is applicable to a wide range of mining conditions and can be adapted to fully mechanized mining faces with steeply inclined coal seams of various inclination degrees. During the on-site construction phase, technicians can flexibly adjust design parameters such as the distribution ratio of the four-zone cross-section, the external dimensions of the double-layer liftable working platform 28, and the spacing of the track support beams 21, based on the measured coal seam dip angle and the cross-sectional specifications of the mining roadway, to adapt to the different geological and roadway conditions in different mining areas.

[0038] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A method for multi-functional zoning and double safety exit collaborative disposal of steeply inclined fully mechanized mining roadway, characterized in that: This method is applicable to longwall mining roadways in steeply inclined coal seams with a dip angle greater than 45°, and includes the following steps: S1. Overall layout of the tunnel system: Construction of each shaft, main tunnel, stone gate and tunnel to build the overall tunnel system; S2. Functional zoning and isolation construction of the mining roadway cross section: In the coal mining face transport roadway (117) and coal mining face return air roadway (116) of the roadway system, steel structure isolation plates are used to divide the roadway cross section into mutually isolated active plate operation area (31), coal chute pipeline well coal conveying area (32), pedestrian ladder escape area (33) and closed area (34). Among them, the movable plate operation area (31) is used to lay the lifting and passage bearing structure, the coal chute pipeline (24) is laid in the coal conveying area (32), the steel structure ladder room (26) is laid in the pedestrian ladder escape area (33), and the pipeline (27) is laid in the enclosed area (34). S3, Arrangement of the lifting and passage bearing structure in the roadway: A double-layer lifting working platform (28) is arranged in the working area (31) of the movable panel. The double-layer lifting working platform (28) includes an upper platform and a lower platform. The surfaces of the upper platform and the lower platform are covered with anti-slip steel plates and guardrails are installed. S4. Construction of track support and anti-slip limiting system: Multiple track support beams (21) are arranged at intervals along the inclined direction of the mining roadway in the working area (31) of the movable plate. The track support beams (21) span the cross section of the mining roadway as a whole, and the two ends of the track support beams (21) are embedded in the surrounding rock (25) of the roadway. The working platform lifting track (22) is installed on the upper part of the track support beams (21). The working platform lifting track (22) extends along the inclined direction of the mining roadway. Lifting and limiting devices are set at both ends of the working platform lifting track (22). A rail clamping device (23) is installed on the double-layer liftable work platform (28). The rail clamping device (23) includes a guide wheel assembly and an anti-disengagement mechanism. The guide wheel assembly cooperates with the work platform lifting rail (22) to achieve lifting guidance. The anti-disengagement mechanism is used to lock the relative position of the double-layer liftable work platform (28) and the work platform lifting rail (22). S5. Daily production collaborative operation control: During normal production operation, the double-layer liftable work platform (28) is locked by the anti-disengagement mechanism of the rail clamping device (23), so that the double-layer liftable work platform (28) is fixed at the designated position of the work platform lifting rail (22), and the upper platform of the double-layer liftable work platform (28) is used as the main safety exit passage base plate. The work platform protective cover (29) is closed to block the upper space of the double-layer liftable work platform (28) and prevent the falling gangue and coal blocks from above. When it is necessary to transfer materials or personnel to the connecting roadway (120) and pass through the dedicated pedestrian roadway (119), the anti-disengagement mechanism of the rail clamping device (23) is released, and the double-layer liftable working platform (28) is driven to rise and fall along the working platform lifting track (22). After adjusting the elevation of the upper platform to be level with the bottom plate elevation of the connecting roadway (120), the rail clamping device (23) is locked again to achieve unobstructed passage and transfer between the coal mining face, the mining roadway, and the connecting roadway (120). S6. Emergency evacuation in case of sudden work: When the main safety exit formed by the double-layer liftable work platform (28) cannot be used normally, the workers can evacuate through the steel structure ladder room (26) inside the independently set pedestrian ladder room escape area (33).

2. The method according to claim 1, characterized in that: The specific method for the overall layout of the roadway system in step S1 is as follows: construct the main shaft (11), auxiliary shaft (12), and ventilation shaft (13) to the target coal seam elevation, construct the main transport gate (14), the bottom yard and the main track gate (15) at the bottom of the shaft, and develop a horizontal transport roadway (17), a horizontal track roadway (18), and a return air roadway (19); construct the return air roadway gate I (110) and the transport roadway gate I (112) from the horizontal transport roadway (17), construct the dedicated pedestrian roadway gate I (114) from the horizontal track roadway (18), and construct the return air roadway gate II (111), the transport roadway gate II (113), and the dedicated pedestrian roadway gate II (115) from the return air roadway (19); The coal mining face is cut horizontally along the coal seam (118), and the coal mining face transport roadway (117), coal mining face return air roadway (116), and dedicated pedestrian roadway (119) are constructed along the coal seam dip as mining roadways. The construction connecting roadway (120) connects the coal mining face transport roadway (117) and dedicated pedestrian roadway (119). The mining face adopts the down-mining method to arrange the mining advance direction along the coal seam dip.

3. The method according to claim 1, characterized in that: In step S2, the movable panel working area (31) is arranged in the middle or on one side of the cross section of the mining roadway, and the area width of the movable panel working area (31) matches the overall external dimensions of the double-layer liftable working platform (28). The coal conveying area (32) of the coal chute well is arranged on one side adjacent to the movable plate operation area (31). The coal chute (24) is continuously laid along the inclined direction of the mining roadway, and the coal is transported by gravity by relying on the dip angle of the coal seam. The pedestrian stairwell escape area (33) and the mobile platform operation area (31) are separated. The steel structure stairwell (26) is equipped with continuous handrails and outer guardrails. The enclosed area (34) is equipped with an openable maintenance cover, and all pipelines (27) are housed inside the enclosed area (34).

4. The method of claim 1, wherein the method further comprises: In step S3, a protective cover (29) is installed on the double-layer liftable work platform (28). The protective cover (29) is connected to the double-layer liftable work platform (28) as a whole through longitudinal steel beams.

5. The method according to claim 4, characterized in that: The protective cover (29) of the work platform adopts a double-layer composite structure. The upper layer of the protective cover (29) is a steel wire mesh, and the lower layer of the protective cover (29) is a thin steel plate.

6. The method for coordinated handling of multi-functional zoning and dual safety exits in a steeply inclined fully mechanized mining roadway according to claim 5, characterized in that: In step S4, a complete set of rail clamping devices (23) is installed at the upper and lower ends of the double-layer liftable work platform (28). The two sets of rail clamping devices (23) work together to achieve dual-point locking and limiting of the double-layer liftable work platform (28).

7. The method for coordinated handling of multi-functional zoning and dual safety exits in a steeply inclined fully mechanized mining roadway according to claim 6, characterized in that: The double-layer liftable work platform (28) is equipped with a hydraulic lock. When the lifting drive system of the double-layer liftable work platform (28) is de-energized, the hydraulic lock can automatically lock the relative position of the double-layer liftable work platform (28) and the lifting track (22) of the work platform.

8. The method for coordinated handling of multi-functional zoning and dual safety exits in a steeply inclined fully mechanized mining roadway according to claim 1, characterized in that: The two ends of the track support beam (21) are embedded in the surrounding rock (25) of the roadway to a depth of not less than 300mm, and the connection between the track support beam (21) and the surrounding rock (25) is reinforced by anchor bolt and anchor cable grouting process.

9. The method for coordinated handling of multi-functional zoning and dual safety exits in a steeply inclined fully mechanized mining roadway according to claim 1, characterized in that: During the construction of the steel structure ladder room (26) inside the pedestrian ladder escape area (33), a rest platform is set up every 6m-8m along the vertical height.

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