Large-dip-angle coal seam pseudo-inclined uphill mining and filling integrated mining method

Abstract

The invention discloses a large-dip-angle coal seam pseudo-inclined uphill mining and filling integrated mining method, and relates to the technical field of large-dip-angle coal seam mining. The technical problem that in the prior art, in the large-dip-angle coal seam mining process, equipment is prevented from falling and slipping is solved. The method comprises the following steps: firstly, dividing a mining area into continuously arranged mining sections, arranging a pseudo-inclined auxiliary transportation uphill in each mining section, dividing each mining section into two-wing production areas, dividing a plurality of strips in the two-wing production areas along the inclination direction, numbering the plurality of strips in odd and even directions, and using the strips as roadways for stoping and preparation; arranging a transportation main roadway and an auxiliary transportation main roadway at the bottom of the mining area, wherein the auxiliary transportation main roadway is also used as an air inlet main roadway; and finally, arranging a roadway system, and mining by adopting a mining and filling integrated process based on a digging and anchoring integrated machine. The method provided by the invention has remarkable comprehensive benefits in the aspects of increasing the resource recovery rate, guaranteeing safe production, controlling environmental damage and the like, and has good application prospects and popularization values.

Description

Technical Field

[0001] This invention relates to the field of steeply inclined coal seam mining technology, specifically to an integrated method for pseudo-inclined uphill mining and filling of steeply inclined coal seams. Background Technology

[0002] Deeply inclined coal seams typically refer to coal seams with a dip angle between 35° and 55°. Achieving safe and efficient mining of deeply inclined coal seams has become an urgent and important engineering and technical issue.

[0003] Currently, the commonly used methods in steeply inclined coal seam mining include: Application No. 201810253628 .0 discloses a method for mining thick coal seams with steep inclination angles. The specific steps are as follows: a) Working face design: Based on the principle of equal length design, the dip angle of the working face and the positions of the return airway, transport roadway, and cut-in are determined according to the previous coal seam exploration, and the distance between the longest and shortest true inclination lengths between the return airway and the transport roadway is ensured not to exceed 2m; b) Working face layout: The working face is arranged with a true inclination angle. The hydraulic supports at the upper and lower ends of the working face need to be arranged along the top and bottom. The distance from the lower side guard plate of the lowermost hydraulic support to the telescopic beam of the end hydraulic support is 0-2m. The uppermost hydraulic support is arranged in the return airway, and its upper side guard plate is arranged in the roof support of the return airway; c) Coal seam mining: After the cut-in of the working face is supported by hydraulic supports, the coal mining machine is used for mining. In specific operation, the upper end is inclined to cut and advance, the coal is cut downwards, the support is moved along with the machine to protect the roof and sides, the floating coal is swept upwards, and the conveyor is pushed randomly. d. Adjusting the supports: Connect at least three hydraulic supports at the bottom using an anti-slip device. As the hydraulic supports move forward, move them from top to bottom. After moving the third to last hydraulic support, move the bottom hydraulic support first under the tension of the anti-slip device, and then move the second to last hydraulic support in the same way. Continue until the bottom hydraulic support and the second to last hydraulic support are adjusted, and then proceed with step c. Application No. 202311783654.1 discloses a method for inclined longwall mining of a steeply inclined coal seam. The specific steps include: S1: First, the working face is arranged, and the mining area is divided into several long strips along the incline. Each long strip is called a section. A coal mining face is arranged along the incline of each section. The working face advances along the incline. The lower boundary of each section is excavated with section transport roadways and auxiliary transport roadways, and the upper section is excavated with section return air roadways, which form ventilation, transport and pedestrian passages between the mining face and the mining area roadways. The mining is carried out along the incline from the boundary of the mining area to the mining area uphill or downhill. The horizontal roadways of each section are connected to the main mining roadway through the mining area transport uphill, return air uphill and auxiliary transport uphill, forming a production system. S2: Then the ore deposit is mined. The coal mining machine in the working face mines the coal and uses the gravity tilt effect of the coal body to make the falling coal body slide down the working face by gravity. It then enters the transport roadway and enters the transport uphill, and then the coal is transported out.

[0004] The aforementioned existing technologies primarily focus on reducing the risk factor during the mining of steeply inclined coal seams by considering the stability of hydraulic supports, while the latter mainly employs longwall mining combined with a support system to ensure safe production at the working face. However, they still have the following technical problems: First, controlling the surrounding rock is difficult, the roadway is prone to breakage, coal wall spalling is intensified, and roof shearing is frequent; second, they face the core safety bottleneck of severe equipment and material slippage, with poor stability of heavy equipment such as coal mining machines and supports, as well as coal on the inclined surface, which seriously restricts safe and efficient production.

[0005] This shows that the existing technology needs further improvement. Summary of the Invention

[0006] The purpose of this invention is to provide an integrated mining method for pseudo-incline uphill mining of steeply inclined coal seams. By arranging the working face and combining it with mining methods, a mining method adapted to steeply inclined conditions is constructed, which can effectively solve the technical problems of equipment anti-tipping and anti-slipping in the process of coal seam mining.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A method for integrated mining and filling of steeply inclined coal seams using pseudo-incline mining and filling techniques includes the following steps:

[0009] a. Divide the mining area into at least three continuously arranged mining sections along the coal seam strike;

[0010] b. A pseudo-inclined auxiliary transport uphill is arranged in each mining section. The pseudo-inclined auxiliary transport uphill is arranged in the coal seam, and the two pseudo-inclined auxiliary transport uphills in adjacent mining sections form a "V" shape.

[0011] c. Divide each mining section into two production areas, namely the east wing production area and the west wing production area. Divide the east wing production area and the west wing production area into several strips along the dip, assign odd and even numbers to the strips, and use them as roadways for mining and preparation.

[0012] d. Arrange the main haulage roadway and auxiliary haulage roadway at the bottom of the mining area, wherein the auxiliary haulage roadway also serves as the intake air roadway;

[0013] e. Arrange the roadway system, which includes one haulage uphill, two return air uphills, and one pseudo-inclined auxiliary haulage uphill located in each mining section; the haulage uphill is arranged in the rock strata of the bottom plate, and the dip angle of the haulage uphill is 35° to 55°; the two return air uphills are respectively arranged at the boundary positions on both sides of the mining area.

[0014] f. An integrated mining and filling process based on a roadheader and anchor machine is adopted. The integrated mining and filling process includes two stages: the first stage: mining and filling the odd-numbered branch roadways in the east wing production area and the even-numbered branch roadways in the west wing production area, with adjacent branch roadways left as protective coal pillars, and "rotational mining and filling" cyclical operations are carried out; the second stage: after the completion of the first stage, mining and filling the even-numbered branch roadways in the east wing production area and the odd-numbered branch roadways in the west wing production area.

[0015] g. Use a coal transportation system to transport the mined coal out.

[0016] The above-mentioned integrated mining method for pseudo-incline uphill mining of steeply inclined coal seams satisfies the relationship between the pseudo-incline angle of the pseudo-incline auxiliary transportation and the dip angle of the coal seam as expressed in equation (1):

[0017] sinβ = sinθ·cosγ (1);

[0018] In equation (1): β is the maximum pseudo-inclination angle, β≤12°, θ is the coal seam dip angle, θ is 35°~55°; γ is the angle between the pseudo-inclination direction and the coal seam dip.

[0019] In the above-mentioned integrated mining method for pseudo-inclined uphill mining of steeply inclined coal seams, step e involves the use of damping plate type controllable chutes for coal transportation uphill.

[0020] In the above-mentioned integrated mining method for pseudo-inclined uphill mining of steeply inclined coal seams, in step e, two return air uphill systems constitute an independent return air system. Grouting pipelines and nitrogen injection pipelines are installed on the two return air uphill systems, and grouting and nitrogen injection are respectively injected into them through the grouting pipelines and nitrogen injection pipelines.

[0021] The above-mentioned integrated mining method for pseudo-inclined uphill mining of steeply inclined coal seams has a coal seam dip angle of 35° to 55°.

[0022] In the above-mentioned integrated mining and filling method for pseudo-inclined uphill mining of steeply inclined coal seams, step f employs an integrated mining and filling process using a longitudinal axis type tunneling and anchoring machine.

[0023] Compared with the prior art, the present invention brings the following beneficial technical effects:

[0024] (1) This invention proposes an integrated mining method for pseudo-inclined uphill mining of steeply inclined coal seams. First, the mining area is divided into at least three continuously arranged mining sections. In each mining section, a pseudo-inclined auxiliary transport uphill road is arranged. Each mining section is divided into two wing production areas. Several strips are divided along the dip in the two wing production areas. The strips are numbered odd and even and used as roadways for mining and preparation. At the bottom of the mining area, a transport roadway and an auxiliary transport roadway are arranged. The auxiliary transport roadway also serves as the intake air roadway. Finally, the roadway system is arranged and mining is carried out using an integrated mining and filling process based on a tunneling and anchoring machine. This invention places a pseudo-inclination auxiliary transport uphill arrangement in the coal seam. Its pseudo-inclination angle is designed and calculated so that the actual transport and walking slope of the roadway is limited to a safe range under the condition of coal seam dip angle, which improves the stability of equipment operation and solves the technical problems of preventing tipping and slipping. This design method, combined with the coal mining process, avoids the equipment management problems of steep-angle longwall working faces by confining mining activities in near-horizontal or low-slope branch roadways, and eliminates the risk of equipment tipping and slipping from the working environment.

[0025] (2) The method of this invention combines the structural control advantages of the room-and-pillar mining method in non-coal mines with the efficient mining characteristics of the integrated mining and filling method in coal mines. Multiple pseudo-inclined auxiliary transport routes are used to transport materials uphill, and the integrated mining and filling process is employed. This not only achieves safe and efficient mining but also effectively solves the problem of equipment anti-tipping and anti-slip during coal seam mining. This technological breakthrough provides a new solution for the green and efficient mining of steeply inclined coal seams.

[0026] (3) The method provided by the present invention has significant comprehensive benefits in terms of improving resource recovery rate, ensuring safe production and controlling environmental damage. It is especially suitable for coal enterprises with strategic requirements for sustainable development and has good application prospects and promotion value. Attached Figure Description

[0027] Figure 1 This is a layout diagram of the steeply inclined coal seam mining roadway for this invention;

[0028] Figure 2 This is a plan view of the mining area division and roadway layout of the present invention;

[0029] Figure 3 This is a cross-sectional view of the tunnel layout of the present invention;

[0030] Figure 4 This is a cross-sectional view of the branch tunnel of the present invention;

[0031] Figure 5 This is a schematic diagram of the branch roadway mining method of the present invention;

[0032] Figure 6 This is a schematic diagram of the branch road numbering of the present invention;

[0033] In the diagram: 1. Coal seam, 2. Branch roadway, 3. Protective coal pillar, 4. Anchor bolt, 5. Mining section one, 6. Mining section two, 7. Mining section three, 8. Return airway, 9. Auxiliary haulage roadway, 10. Transport roadway, 11. Mining area coal bunker, 12. Coal chute, 13. Pseudo-inclined auxiliary haulage uphill, 14. Transport uphill, 15. Return airway uphill, 16. Integrated tunneling and anchoring machine, ①, ②, ③, ④, ⑤, ⑥, and ⑦ are the branch roadway numbers of the east and west wings. Detailed Implementation

[0034] This invention proposes an integrated mining method for pseudo-incline uphill mining of steeply inclined coal seams. To make the advantages and technical solutions of this invention clearer and more explicit, the invention will be further described below with reference to specific embodiments.

[0035] In the description of this application, the words "one," "two," etc., are used only to distinguish different objects and do not limit the quantity or order of execution, nor do they imply that they must be different. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0036] The technical solution of this application will be further described in detail below with reference to the accompanying drawings.

[0037] A method for integrated mining and filling of steeply inclined coal seams using pseudo-incline uphill mining, specifically including the following steps:

[0038] Step 1: Divide the mining area into at least three continuously arranged mining sections along the strike of coal seam 1; to ensure the safe and efficient advancement of fully mechanized coal mining operations, this mining area strictly adheres to the overall layout principles of systematic, sequential, and centralized production. Combined with... Figure 1 , 2 As shown in Figure 3, the mining area is scientifically divided into three successive mining sections along the direction of the coal seam, which are numbered sequentially as Mining Section 1 (5), Mining Section 2 (6), and Mining Section 3 (7), in order to achieve orderly connection of the production system and intensive development of resources.

[0039] Step 2: Arrange a pseudo-inclined auxiliary transport uphill 13 in each mining section. The pseudo-inclined auxiliary transport uphill is arranged in the coal seam, and the two pseudo-inclined auxiliary transport uphills in adjacent mining sections form a "V" shape.

[0040] The aforementioned pseudo-inclined auxiliary transport uphill system runs through all mining levels. The core advantage of the pseudo-inclined auxiliary transport uphill system is that by adjusting the angle between the roadway axis and the direction of maximum dip, the actual operating slope for personnel, equipment passage, and material transportation is significantly reduced from the source of system design, providing a structural basis for mitigating the risk of slippage for equipment and personnel.

[0041] Step 3: Divide each mining section into two production areas, namely the East Wing Production Area and the West Wing Production Area. Divide the East Wing Production Area and the West Wing Production Area into several strips along the dip, assign odd and even numbers to the strips, and use them as roadways for mining and preparation.

[0042] By employing an alternating pattern of odd and even numbering, the coal seams are extracted and backfilled in a rational sequence, thus achieving a reasonable succession of mining operations in both time and space. This arrangement not only optimizes the ventilation network and reduces ventilation resistance but also significantly improves auxiliary transportation efficiency, enhances the overall disaster prevention and mitigation capabilities of the mining area, and provides a systematic guarantee for the safe and efficient extraction of the working face.

[0043] Step 4: Arrange the main haulage roadway 10 and the auxiliary haulage roadway 9 at the bottom of the mining area. The auxiliary haulage roadway also serves as the intake air roadway. Arrange the roadway system, which includes one haulage uphill 14, two return air uphills 15, and one pseudo-inclined auxiliary haulage uphill located in each mining section. The haulage uphill is arranged in the rock strata of the bottom plate, and the dip angle of the haulage uphill is 35° to 55°. The two return air uphills are respectively arranged at the boundary positions on both sides of the mining area.

[0044] For coal seams with steep dips of 35° to 55°, conventional belt conveyor methods are no longer suitable. Gravity conveying via chutes is employed. The chutes used are damping-plate controlled chutes, with ultra-wear-resistant materials bonded inside to control the coal's descent speed and ensure safe transport.

[0045] Two return air inclines are located within the coal seam. These inclines are situated at the boundaries of the mining area on both sides, connecting to the auxiliary haulage roadway at the bottom and the return air roadway 8 at the top, forming an independent return air system for the mining face. Grouting and nitrogen injection trunk lines are laid on the two return air inclines respectively, for use in filling operations and for preventing spontaneous combustion of coal seams and sealed goafs during mining.

[0046] One auxiliary haulage uphill roadway is constructed in the mining area, with pseudo-inclined sections arranged in three separate sections. These uphill roads are situated within the coal seam, connecting various branch roadways. The core parameters of the pseudo-inclined uphill roadway design directly serve the purpose of preventing tipping and slippage: by calculating and controlling a reasonable pseudo-inclined angle, the actual walking and hauling gradient is reduced even when the true dip angle of the coal seam reaches 55°. This significantly improves the stability and safety of the auxiliary haulage equipment, effectively solving the key problems of difficult climbing, braking, and easy slippage of equipment in steeply inclined roadways.

[0047] The mining area coal bunker 11 is located between the lower entrance of the mining area haulage incline and the mining area haulage main roadway. The mining area substation should be located in the mining area auxiliary haulage main roadway; coal chutes 12 are located in the middle of each section of the auxiliary haulage incline, with a total of three chutes; at the intersection of the mining area auxiliary haulage incline and each coal seam branch roadway, a yard is excavated for connecting the branch roadways.

[0048] The maximum permissible pseudo-inclination angle β = 12°, and the true dip angle θ of the coal seam is 35° to 55°.

[0049] Calculate the angle (γ) between the pseudo-inclination direction and the dip direction of the coal seam.

[0050] The geometric relationship between the pseudo-inclination angle (β) of the roadway, the true dip angle of the coal seam (θ), and the horizontal angle (γ) is as follows:

[0051] sinβ=sinθ cosγ

[0052] Derivation:

[0053] cosγ = sinβ / sinθ, thus γ can be calculated.

[0054] Step 5: Adopt the integrated mining and filling process based on the tunneling and anchoring machine 16, which includes two stages: Stage 1: Mining and filling the odd-numbered branch roadways in the east wing production area and the even-numbered branch roadways in the west wing production area. Adjacent branch roadways are left as protective coal pillars 3, and "rotational mining and filling" cycle operations are carried out; Stage 2: After the completion of Stage 1, mining and filling the even-numbered branch roadways in the east wing production area and the odd-numbered branch roadways in the west wing production area.

[0055] like Figure 5 As shown, this process abandons the traditional linear model of "first full-scale excavation, then separate mining" in longwall mining faces. Utilizing the flexibility of the integrated tunneling and anchoring machine, it adopts an "integrated mining and filling" strategy. By deeply integrating coal mining and roadway excavation functions, and coordinating a continuous transport line from the working face directly to the main haulage system, safe, efficient, and low-consumption mining is achieved under steep inclination conditions. A key innovation of this process is that it completely avoids the extreme challenges of arranging and managing heavy fully mechanized mining equipment on steep inclination longwall mining faces. Instead, it uses mechanized mining operations in near-horizontal branch roadways (coal parcels), ensuring that the coal mining equipment always operates and is supported stably on a low-slope or near-horizontal roadway floor. This eliminates the risk of equipment tipping or sliding due to excessive inclination from the working environment, achieving an inherently safe mining method.

[0056] Core mining equipment: Integrated roadheader-anchor (TOA) is used, with longitudinal axis TOA being the preferred choice. TOA typically refers to a machine with powerful cutting capabilities and integrated loading and support functions; its core feature is the ability to both rapidly excavate roadways and efficiently recover coal pillars.

[0057] Supporting transportation system: 1) The tunneling and anchoring machine comes with a transfer machine: it receives the cut coal and lifts it to subsequent equipment.

[0058] 2) Mine shuttle car: Used to transport coal between the roadheader and the coal chute. Transportation route: Roadheader → Transfer conveyor → Mine shuttle car → Coal chute → Chute → Mining area coal bunker → Main transport roadway.

[0059] Mining Technology: A scientifically sound and orderly "two-wing skip-mining with intermittent backfilling" method was adopted in the mining process. The branch roadway cross-section diagram is shown below. Figure 4 As shown in the figure, anchor bolt 4 and branch roadway 2 are illustrated. During mining, the branch roadway numbering diagram is as follows: Figure 6 As shown, the specific mining sequence is as follows: Phase 1: Mining and backfilling the odd-numbered branch roadways of the east wing and the even-numbered branch roadways of the west wing. The odd-numbered branch roadways of the east wing and the even-numbered branch roadways of the west wing are mined sequentially. East wing branch roadway ① is mined, followed by west wing branch roadway ②, and then east wing branch roadway ③. During this process, adjacent branch roadways are actively reserved as protective coal pillars, serving as temporary roof support and controlling surrounding rock deformation. For branch roadways currently being mined, we implement a "rotational mining and backfilling" cyclical operation mode: that is, after coal mining is completed in one branch roadway, backfilling of the goaf is immediately carried out. Once the backfill is stable, the process switches to the next branch roadway for mining and backfilling. This "integrated mining and backfilling" cycle ensures the timely stability of the mining area structure.

[0060] Phase Two: Mining and filling of the even-numbered branch tunnels in the east wing and the odd-numbered branch tunnels in the west wing. For example... Figure 6 As shown, the branch roadways of the east and west wings are numbered ①, ②, ③, ④, ⑤, ⑥, and ⑦, respectively. After all the branch roadways in the first stage have been mined and backfilled, the previously established even-numbered branch roadways in the east wing and odd-numbered branch roadways in the west wing are in a stable environment surrounded by backfill. At this point, the second stage of mining begins, namely, mining the even-numbered branch roadways in the east wing and the odd-numbered branch roadways in the west wing in sequence, mining branch roadway ① in the west wing, then mining branch roadway ② in the east wing, and finally mining branch roadway ③ in the west wing. Because the surrounding goaf is supported by backfill, the roof pressure is effectively controlled, creating safe conditions for the mining of the remaining branch roadways.

[0061] This mining strategy of "two-wing mining, skipping one step at a time, orderly mining and filling in parallel" not only achieves orderly and efficient recovery of coal resources, but more importantly, through the synergistic effect of leaving coal pillars and timely filling, it actively manages the stress of the surrounding rock in the mining area, minimizes stratum disturbance, and ensures the safety and sustainability of the entire mining process.

[0062] Step 5: Use a coal transportation system to transport the mined coal out. The specific coal transportation system can be implemented by those skilled in the art by referring to existing technologies.

[0063] The specific steps for evaluating the suitability of the mining method of the present invention are as follows:

[0064] (a) Technological adaptability analysis

[0065] 1. Adaptability to geological conditions:

[0066] 1) Core Applicable Objects: This method is specifically designed for steeply dipped coal seams with a dip angle of 35°~55°. It is especially suitable for mining areas with unstable coal seam occurrence, numerous faults, fractured or moderately stable immediate roof, and where traditional longwall mining is risky and inefficient.

[0067] 2) Coal seam thickness: Suitable for thin coal seams, medium-thick coal seams, and thick coal seams, especially suitable for irregularly shaped blocks and coal pillars that need to be protected on the ground.

[0068] 2. Adaptability of technological concepts:

[0069] This method integrates the structural control concept of non-coal "room-pillar" mining with the technological essence of coal mine "mining-filling integration," and is suitable for mining areas with strict requirements for surface subsidence control, water resource protection, or "three-under" coal mining, thus achieving green mining. The "pseudo-incline uphill" layout effectively breaks through the bottleneck of auxiliary transportation under steep inclines, and is suitable for modern mines with higher pursuit of production efficiency and safety.

[0070] (II) Evaluation of main advantages

[0071] 1. Significantly improved security:

[0072] 1) Active management of ground pressure: The "one-skip-one" mining sequence and the "rotational mining and filling" operation mode ensure that the mining area is always in a stable structure supported by the "coal pillar-filling body", which greatly alleviates problems such as severe mine pressure and roadway deformation.

[0073] 2) Enhanced disaster prevention and control: The integration of the independent return air system and pipelines effectively prevents gas accumulation and spontaneous combustion of coal seams. The multi-channel layout enhances the reliability of ventilation and disaster avoidance.

[0074] 3) Improved working environment: The pseudo-incline assisted transport significantly reduces the intensity of personnel climbing slopes and reduces the safety hazards related to physical exertion.

[0075] 4) Systematic Solution to Equipment Stability and Anti-Tipping / Slippage: This invention addresses the anti-tipping and anti-slippage challenges from two levels by combining a "pseudo-inclined roadway system" with "room-pillar type mining and filling technology." At the macro-transportation level, the pseudo-inclined incline controls the actual transport gradient within a safe range; at the micro-mining level, mining activities are confined to near-horizontal branch roadways, avoiding the operation of heavy equipment on steeply inclined exposed surfaces. These two technologies work together to form a multi-layered, systematic equipment stability assurance system, fundamentally solving the core safety issues restricting the mechanized mining of steeply inclined coal seams.

[0076] 2. Optimization of mining efficiency and resource recovery rate:

[0077] 1) Parallel and efficient system: The integrated tunneling and anchoring machine realizes the integration of tunneling and mining, and the coal mining and backfilling operations are carried out in parallel, which reduces the conversion time of traditional processes and improves equipment utilization.

[0078] 2) High resource recovery rate: Through two-stage orderly mining of all branch roadways, almost all coal resources in the mining area can be extracted in theory. The resource recovery rate is much higher than that of the traditional room and pillar mining method. It is estimated that the comprehensive recovery rate of the mining area can reach more than 85%.

[0079] 3) High roadway utilization rate: All branch roadways serve mining operations, there are no dedicated abandoned roadways, and the roadway excavation rate is relatively low.

[0080] 3. Outstanding ecological and environmental benefits:

[0081] 1) Timely filling of the goaf effectively supports the overlying rock strata, significantly controls surface subsidence, and protects surface buildings, water bodies and farmland.

[0082] 2) Solid waste such as coal mine ore can be used as filling material to achieve "treating harm with waste", reduce the accumulation of gangue on the ground, and conform to the concept of circular economy.

[0083] In summary, the integrated mining and filling method for pseudo-inclined uphill mining of steeply inclined coal seams provided by this invention is an innovative and feasible system solution to address the challenges of safe, efficient, and green mining of steeply inclined coal seams. It offers significant comprehensive benefits in improving resource recovery rates, ensuring safe production, and controlling environmental damage. It is particularly suitable for coal enterprises with strategic requirements for sustainable development and has promising application prospects and widespread application value.

[0084] Any parts not mentioned in this invention can be achieved by referring to existing technologies.

[0085] Those skilled in the art should recognize that the above embodiments are only used to illustrate this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the essential spirit and scope of this application fall within the scope of protection claimed in this application.

Claims

1. A method for integrated mining and filling of steeply inclined coal seams using pseudo-incline mining, characterized in that, The steps are as follows: a. Divide the mining area into at least three continuously arranged mining sections along the coal seam strike; b. A pseudo-inclined auxiliary transport uphill is arranged in each mining section. The pseudo-inclined auxiliary transport uphill is arranged in the coal seam, and the two pseudo-inclined auxiliary transport uphills in adjacent mining sections form a "V" shape. c. Divide each mining section into two production areas, namely the east wing production area and the west wing production area. Divide the east wing production area and the west wing production area into several strips along the dip, assign odd and even numbers to the strips, and use them as roadways for mining and preparation. d. Arrange the main haulage roadway and auxiliary haulage roadway at the bottom of the mining area, wherein the auxiliary haulage roadway also serves as the intake air roadway; e. Arrange the roadway system, which includes one haulage uphill, two return air uphills, and one pseudo-inclined auxiliary haulage uphill located in each mining section; the haulage uphill is arranged in the rock strata of the bottom plate, and the dip angle of the haulage uphill is 35° to 55°; the two return air uphills are respectively arranged at the boundary positions on both sides of the mining area. f. An integrated mining and filling process based on a roadheader and anchor machine is adopted. The integrated mining and filling process includes two stages: the first stage: mining and filling the odd-numbered branch roadways in the east wing production area and the even-numbered branch roadways in the west wing production area, with adjacent branch roadways left as protective coal pillars, and "rotational mining and filling" cycle operation is performed; the second stage: after the completion of the first stage, mining and filling the even-numbered branch roadways in the east wing production area and the odd-numbered branch roadways in the west wing production area. g. Use a coal transportation system to transport the mined coal out.

2. The integrated mining method for pseudo-incline uphill mining of steeply inclined coal seams according to claim 1, characterized in that: The relationship between the pseudo-inclination angle and the coal seam dip angle for pseudo-inclination-assisted transport uphill satisfies equation (1): sinβ = sinθ·cosγ (1); In equation (1): β is the maximum pseudo-inclination angle, β≤12°, θ is the coal seam dip angle, θ is 35°~55°; γ is the angle between the pseudo-inclination direction and the coal seam dip.

3. The integrated mining method for pseudo-incline uphill mining of steeply inclined coal seams according to claim 1, characterized in that: In step e, the coal is transported uphill using a damped plate controllable chute.

4. The integrated mining method for pseudo-incline uphill mining of steeply inclined coal seams according to claim 1, characterized in that: In step e, the two return air uphill systems form an independent return air system. Grouting pipelines and nitrogen injection pipelines are installed on the two return air uphill systems, and grouting and nitrogen injection are carried out in them respectively through the grouting pipelines and nitrogen injection pipelines.

5. The integrated mining method for pseudo-incline uphill mining of steeply inclined coal seams according to claim 1, characterized in that: The coal seam dip angle is 35° to 55°.

6. The integrated mining method for pseudo-incline uphill mining of steeply inclined coal seams according to claim 1, characterized in that: In step f, the integrated mining and filling process of the longitudinal axis tunneling and anchoring machine is adopted.

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