An integrated physical fluidization mining equipment for coal reservoirs and its application method

Abstract

This invention discloses an integrated physical fluidization mining and excavation equipment and its method for use in coal reservoirs, relating to the field of coal mining technology. The equipment includes a shell, a mining mechanism, a water jet mechanism, a conveying mechanism, a crushing mechanism, and a moving mechanism. The mining mechanism includes a cutterhead shell, a cutting cutterhead, a cutterhead drive assembly, and a roller cutter assembly. The cutterhead drive assembly is located within the cutterhead shell and drives the cutting cutterhead to rotate. A roller cutter assembly is located at the front end of the cutting cutterhead, and the cutting cutterhead has multiple feed holes. The water jet mechanism includes a water supply assembly and multiple water jet nozzles, with one nozzle located in each mounting hole. A conveying chamber and a crushing chamber are sequentially arranged from front to back within the shell. One end of the conveying mechanism is installed in the cutterhead shell, and the other end is installed in the conveying chamber. The crushing mechanism is located in the crushing chamber. This equipment and its method integrate mining, conveying, crushing, moving, and fluidization processing into one integrated unit, occupying little space, improving mining efficiency, and reducing mining costs.

Description

Technical Field

[0001] This invention relates to the field of coal mining technology, and in particular to an integrated equipment and method for physical fluidization mining of coal reservoirs. Background Technology

[0002] In traditional coal mining technology, large machinery and heavy equipment are widely used in underground coal mining operations. However, these machines have significant limitations in flexibility and adaptability when faced with complex and variable geological conditions, narrow mining spaces, and environmental protection requirements.

[0003] Especially in soft coal seams, the drilling process is hampered by environmental forces such as ground stress and gas pressure, which can easily lead to borehole collapse, drill bit suction, blowouts, and coal drilling problems, severely impacting gas extraction efficiency. Furthermore, tunnel construction in soft coal seams presents challenges due to the coal's hardness coefficient (f) being less than 1, resulting in high tunnel pressure, fault crossings, and soft, fractured rock. Conventional construction methods and support structures often prove ineffective. Therefore, mining technology in soft coal seams faces numerous challenges, including drilling difficulties, low gas extraction efficiency, low-level technical equipment, tunneling problems, and difficulties in controlling surrounding rock. These challenges require technological innovation and equipment upgrades to overcome.

[0004] In-situ fluidized bed mining technology in coal mines is gradually gaining widespread recognition in the industry. Currently, the main technical methods used in this field rely on large-scale mining equipment. However, existing large-scale mining equipment only has mining functions, which are limited to single functions. It needs to be used in conjunction with other equipment to complete the transmission, crushing, and coal-water mixing, resulting in low mining efficiency, high mining costs, and large space occupation. Summary of the Invention

[0005] To address the above technical problems, this invention provides an integrated physical fluidization mining equipment and method for coal reservoirs, which integrates mining, transportation, crushing, movement and fluidization treatment, occupies little space, improves mining efficiency and reduces mining costs.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] This invention provides an integrated physical fluidization mining and excavation equipment for coal reservoirs, comprising a shell, a mining mechanism, a water jet mechanism, a transmission mechanism, a crushing mechanism, and a moving mechanism. The mining mechanism includes a cutterhead shell, a cutting cutterhead, a cutterhead drive assembly, and a roller cutter assembly. The cutterhead shell is disposed at the front end of the shell, and the cutting cutterhead is rotatably mounted at the front end of the cutterhead shell. The cutterhead drive assembly is disposed in the cutterhead shell and is used to drive the cutting cutterhead to rotate. The roller cutter assembly is disposed at the front end of the cutting cutterhead. The cutting cutterhead has multiple feed holes and multiple mounting holes. The water jet mechanism includes a water supply component and multiple water jet nozzles. Each mounting hole is provided with one water jet nozzle. The water supply component is disposed on the housing and is used to supply water to the water jet nozzles. The housing is provided with a transmission chamber and a crushing chamber from front to back. The front end of the transmission chamber is connected to the outlet at the rear end of the cutter disc housing. One end of the transmission mechanism is installed in the cutter disc housing and the other end is installed in the transmission chamber. The crushing mechanism is disposed in the crushing chamber. The rear end of the housing is provided with a discharge port corresponding to the position of the crushing chamber. The moving mechanism is disposed at the bottom of the housing.

[0008] Preferably, a support frame is provided in the cutter head housing, and the central shaft at the rear end of the cutting cutter head is rotatably mounted on the support frame via a bearing. The cutter head drive assembly is used to drive the central shaft to rotate.

[0009] Preferably, the cutter head drive assembly includes a cutter head motor and a transmission gearbox. Both the cutter head motor and the transmission gearbox are disposed in the upper part of the cutter head housing. The cutter head motor is connected to the power input end of the transmission gearbox, and the power output end of the transmission gearbox is connected to the central shaft.

[0010] Preferably, the multiple hob sets include multiple single-edged hobs and multiple double-edged hobs.

[0011] Preferably, the water supply assembly includes a water pump, a water pump motor, a rotary joint, a main hose, and multiple branch hoses. The water pump and the water pump motor are both located on the upper part of the housing. The water pump motor is used to drive the water pump. One end of the main hose is connected to the outlet of the water pump through the rotary joint. The other end of the main hose is connected to multiple branch hoses. The end of each branch hose away from the main hose is connected to a water jet nozzle.

[0012] Preferably, the transmission mechanism includes a first support, a second support, a screw, and a transmission motor. The first support is disposed in the lower part of the cutter head housing, the second support is disposed at one end of the transmission chamber near the crushing chamber, the two ends of the screw are respectively rotatably mounted in the first support and the second support, and the transmission motor is disposed on the second support and is used to drive the screw to rotate.

[0013] Preferably, the crushing mechanism includes two crushing components, which are arranged sequentially from left to right in the crushing chamber. Each crushing component includes a crushing motor, a rotating shaft, and multiple crushing blades. The rotating shaft is vertically arranged in the crushing chamber, and its two ends are rotatably mounted on the housing. Multiple crushing blades are arranged sequentially along the axial direction on the rotating shaft. The crushing motor is mounted on the housing and connected to the upper end of the rotating shaft. The multiple crushing blades on the two rotating shafts are arranged alternately.

[0014] Preferably, the transmission cavity includes a cylindrical cavity and a conical cavity arranged sequentially from front to back. The front end of the cylindrical cavity is connected to the outlet at the rear end of the cutter head housing, and the rear end of the conical cavity is connected to the crushing cavity. The cross-sectional area of ​​the conical cavity gradually increases from front to back, and the cross-section of the frontmost part of the conical cavity is the same as the cross-section of the cylindrical cavity.

[0015] Preferably, the moving mechanism includes a moving track and a track motor, the moving track being disposed at the bottom of the housing, and the track motor being used to drive the moving track to move.

[0016] This invention also provides a method for using an integrated physical fluidization mining equipment for coal reservoirs, comprising the following steps:

[0017] Step 1: Construct a vertical shaft down to the coal seam to be mined, excavate a storage pit at the bottom of the shaft, and build a shaft hoisting system at the shaft opening;

[0018] Step 2: Use the vertical shaft hoisting system to transport the integrated physical fluidization mining equipment for coal reservoirs to a predetermined position in the shaft, ensuring that the integrated physical fluidization mining equipment for coal reservoirs is close to the coal seam, so that the cutting head of the integrated physical fluidization mining equipment for coal reservoirs faces the coal seam;

[0019] Step 3: When the cutting disc of the integrated physical fluidization mining equipment for coal reservoirs contacts the coal seam, the cutting disc drive assembly is activated, causing the cutting disc to rotate and cut the coal seam along a certain upward mining route; at the same time, the water supply assembly, the transmission mechanism and the crushing mechanism are activated synchronously.

[0020] Step 4: The coal powder particles generated during the cutting process are transported to the crushing mechanism through the conveying mechanism, and the crushing mechanism further refines the coal powder.

[0021] Step 5: The crushed coal powder is then discharged to the rear of the integrated physical fluidization mining equipment for coal reservoirs and falls into the roadway. The water jet generated at the front end of the integrated physical fluidization mining equipment for coal reservoirs forms a water flow in the roadway, which transforms the coal powder behind the integrated physical fluidization mining equipment for coal reservoirs into a fluidized coal-water mixture. Under the inclination of the roadway, the coal-water mixture is driven by the water flow and continuously flows towards the rear of the mining area, eventually concentrating and falling at the shaft.

[0022] Step 6: The coal-water mixture falls into the storage tank at the bottom of the well shaft through the well shaft, and is then transported to the surface by a pumping system; subsequently, the coal, water, and coalbed methane are separated and collected by a coal-water-gas three-phase separation device.

[0023] Compared with the prior art, the present invention has achieved the following technical effects:

[0024] The coal reservoir physical fluidization mining integrated equipment of the present invention includes a shell, a mining mechanism, a water jet mechanism, a transmission mechanism, a crushing mechanism, and a moving mechanism. Based on the surface drilling and vertical shaft hoisting system, the coal reservoir physical fluidization mining integrated equipment is placed in the coal seam and can move autonomously in the roadway to realize the mining and crushing of the coal body. It adopts a technology combining a cutting disc and high-pressure water jet to achieve efficient cutting and crushing of the coal body, which significantly improves the efficiency of coal mining. The mining coal body is transported to the crushing chamber through the transmission mechanism and crushed by the crushing mechanism to further reduce the particle size of the cut coal body, so that it meets the particle size allowed by the pumping process in the fluidized mining process. This realizes the continuity of mining and transportation, reduces intermediate links, and improves the efficiency of operation. The scouring effect of high-pressure water jets promotes the fluidization of the coal mass, providing conditions for gravity-flow transport of the coal in the roadway. This reduces reliance on traditional conveying equipment. Under the combined action of high-pressure water flow and gravity, the crushed coal flows by gravity along the roadway into the shaft and eventually collects in the storage tank at the bottom of the shaft, achieving continuous coal transport and reducing energy consumption and equipment requirements in the transportation process. This invention integrates mining, conveying, crushing, moving, and fluidization treatment into a single unit, occupying a small space, improving mining efficiency, and reducing mining costs. It is a miniaturized, integrated, and highly efficient physical fluidization mining equipment for coal reservoirs. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A three-dimensional structural diagram of the integrated physical fluidization mining equipment for coal reservoirs provided by the present invention;

[0027] Figure 2 Internal structure diagram of the integrated physical fluidization mining equipment for coal reservoirs provided by the present invention;

[0028] Figure 3 This is a front view of the integrated physical fluidization mining equipment for coal reservoirs provided by the present invention;

[0029] Figure 4 This is a schematic diagram illustrating the use of the integrated physical fluidization mining equipment for coal reservoirs provided by the present invention.

[0030] Explanation of reference numerals in the attached drawings: 100, Integrated equipment for physical fluidization mining of coal reservoirs; 1, Shell; 2, Moving track; 3, Water pump; 4, Water pump motor; 5, Cutter head shell; 6, Cutting cutter head; 7, Single-edged cutter; 8, Double-edged cutter; 9, Feed hole; 10, Water jet nozzle; 11, Cylindrical cavity; 12, Conical cavity; 13, Crushing chamber; 14, Screw; 15, Transmission motor; 16, Crushing blade; 200, Coal seam; 300, Shaft; 400, Vertical shaft hoisting system; 500, Storage tank; 600, Pumping system; 700, Coal-water mixture; 800, Coal-water-gas three-phase separation device. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] The purpose of this invention is to provide an integrated physical fluidization mining equipment and method for coal reservoirs, which integrates mining, transportation, crushing, movement and fluidization treatment, occupies little space, improves mining efficiency and reduces mining costs.

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figures 1-4 As shown, this embodiment provides an integrated physical fluidization mining and excavation equipment 100 for coal reservoirs, including a shell 1, a mining mechanism, a water jet mechanism, a conveying mechanism, a crushing mechanism, and a moving mechanism. The mining mechanism includes a cutterhead shell 5, a cutting cutterhead 6, a cutterhead drive assembly, and a roller cutter assembly. The cutterhead shell 5 is located at the front end of the shell 1, and the cutting cutterhead 6 is rotatably mounted at the front end of the cutterhead shell 5. The cutterhead drive assembly is located in the cutterhead shell 5 and is used to drive the cutting cutterhead 6 to rotate. A roller cutter assembly is provided at the front end of the cutting cutterhead 6. The cutting cutterhead 6 is provided with multiple feed holes 9, through which the cut and crushed coal can enter the cutterhead shell 5. The cutting cutterhead 6 is provided with multiple mounting holes. The water jet mechanism includes a water supply assembly and multiple water jet nozzles 10, and each mounting hole is provided with a water jet nozzle 10. The water supply component is installed on the housing 1 and is used to supply water to the water jet nozzle 10. The housing 1 is provided with a transmission chamber and a crushing chamber 13 from front to back. The front end of the transmission chamber is connected to the outlet at the rear end of the cutter head housing 5. One end of the transmission mechanism is installed in the cutter head housing 5 and the other end is installed in the transmission chamber. The transmission mechanism is used to transport the coal in the cutter head housing 5 to the crushing chamber 13. The crushing mechanism is installed in the crushing chamber 13. The rear end of the housing 1 is provided with a discharge port corresponding to the position of the crushing chamber 13. The crushing mechanism is used to further crush the coal transported to the crushing chamber 13 to avoid the generation of large-diameter coal blocks. Then, the coal is discharged to the rear of the coal reservoir physical fluidized mining integrated equipment 100 through the discharge port. The moving mechanism is installed at the bottom of the housing 1 and is used to drive the entire equipment to move.

[0035] In use, based on the surface drilling and vertical shaft hoisting system 400, the coal reservoir physical fluidization mining integrated equipment 100 is placed in the coal seam 200. It can move autonomously in the roadway to realize the mining and crushing of the coal body. The technology of combining the cutting disc 6 with high-pressure water jet is adopted to achieve efficient cutting and crushing of the coal body, which significantly improves the efficiency of coal mining. The mined coal body is transported to the crushing chamber 13 through the transmission mechanism and crushed by the crushing mechanism to further reduce the particle size of the cut coal body, so that it meets the particle size allowed by the pumping process in the fluidized mining process. This realizes the continuity of mining and transportation, reduces intermediate links, and improves the efficiency of operation. The scouring effect of the high-pressure water jet promotes the fluidization of the coal body, providing conditions for the gravity transport of the coal body in the roadway, thereby reducing the reliance on traditional conveying equipment. Under the dual action of high-pressure water flow and gravity, the crushed coal body flows into the shaft 300 along the roadway and finally collects in the storage tank 500 at the bottom of the shaft 300, realizing the continuous transport of the coal body and reducing the energy consumption and equipment requirements in the transportation process.

[0036] This embodiment integrates mining, transportation, crushing, movement, and fluidization processing into a single unit. It features a compact structure, small overall size, and minimal space occupation. During mining, disturbance to the coal seam 200 is minimized, effectively protecting the structural integrity of the coal seam 200, reducing the impact on the surrounding environment, improving mining efficiency, and lowering mining costs. It is a miniaturized, integrated, and highly efficient coal reservoir physical fluidization mining equipment 100. This coal reservoir physical fluidization mining equipment 100 in this embodiment achieves the mining and crushing of the coal body, while simultaneously transforming the crushed coal body into a transportable fluidized resource. This not only avoids dust pollution in the roadway but also adapts to narrow mining spaces, improving operational efficiency under complex geological conditions and achieving the goal of safe and efficient in-situ mining of coal reservoirs.

[0037] A support frame is provided in the cutter head housing 5. The central shaft at the rear end of the cutting cutter head 6 is rotatably mounted on the support frame via a bearing, and the cutting cutter head 6 is in contact with the front end of the cutter head housing 5. The cutter head drive assembly is used to drive the central shaft to rotate.

[0038] The cutter head drive assembly includes a cutter head motor and a transmission gearbox. Both the cutter head motor and the transmission gearbox are located in the upper part of the cutter head housing 5. The power input end of the cutter head motor is connected to the power input end of the transmission gearbox, and the power output end of the transmission gearbox is connected to the central shaft. In this embodiment, the transmission gearbox and the cutter head motor are arranged sequentially from front to back.

[0039] The multiple cutter sets include multiple single-edged cutters 7 and multiple double-edged cutters 8. The surface shape of the cutting disc 6 is a spoke type, with a feed hole 9 provided between any two adjacent spokes. Multiple double-edged cutters 8 are concentrated in the middle of the spokes, and multiple single-edged cutters 7 are arranged in concentric circles on the surface of the spokes to improve cutting efficiency and uniformity.

[0040] In this specific embodiment, both the cutter head shell 5 and the cutting cutter head 6 are welded from steel structures, and the diameter of the cutting cutter head 6 is 0.3m to 0.5m.

[0041] In this specific embodiment, the shell 1 is a cylindrical flexible shell. The cylindrical flexible shell has a certain ability to withstand the collisions and frictions generated when the coal reservoir physical fluidization mining integrated equipment 100 travels in the coal seam 200, and is not prone to wear.

[0042] Specifically, the cylindrical flexible shell is made of thermoplastic polyurethane or carbon fiber composite material, which has wear resistance, flexibility and tear resistance, can withstand large impacts and friction, and has good processing performance and plasticity.

[0043] The water supply assembly includes a water pump 3, a water pump motor 4, a rotary joint, a main hose, and multiple branch hoses. The water pump 3 and water pump motor 4 are both located on the upper part of the housing 1. The water pump motor 4 drives the water pump 3. The inlet of the water pump 3 is connected to a water source. One end of the main hose is connected to the outlet of the water pump 3 via the rotary joint, and the other end of the main hose is connected to multiple branch hoses. The end of each branch hose furthest from the main hose is connected to a water jet nozzle 10. The water jet nozzle 10 is mounted on the cutting disc 6 and rotates with it. The rotary joint allows the multiple branch hoses and the main hose to rotate with the water jet nozzle 10.

[0044] During operation, the water in pump 3 is converted into a high-pressure water flow through the main hose and branch hose, and sprayed out by the water jet nozzle 10 to flush the coal body being cut in front, soften the coal body in front of the equipment, reduce the strength of the coal body, promote the crushing process of the coal body and transform it into a form of resource that is easy to transport. At the same time, it causes the coal powder falling into the roadway to be transformed into a fluidized state that is easy to transport.

[0045] In this specific embodiment, the jet direction of the water jet nozzle 10 is perpendicular to the cutting disc 6. There are four water jet nozzles 10, which are distributed in the middle of the cutting disc 6 and are evenly distributed along the circumference of the cutting disc 6.

[0046] In this specific embodiment, both the main hose and the branch hose are high-pressure hoses.

[0047] The transmission mechanism includes a first support, a second support, a screw 14, and a transmission motor 15. The first support is located in the lower part of the cutter head housing 5, and the second support is located at one end of the transmission chamber near the crushing chamber 13. The two ends of the screw 14 are rotatably mounted in the first and second supports, respectively. The transmission motor 15 is mounted on the second support and is used to drive the screw 14 to rotate. During operation, the transmission motor 15 drives the screw 14 to rotate, conveying the coal in the cutter head housing 5 to the crushing chamber 13.

[0048] Specifically, one end of the screw 14 is rotatably mounted in the first support via a bearing, and the other end of the screw 14 is rotatably mounted in the second support via a bearing.

[0049] The crushing mechanism includes two crushing components, which are arranged sequentially from left to right in the crushing chamber 13. Each crushing component includes a crushing motor, a rotating shaft, and multiple crushing blades 16. The rotating shaft is vertically arranged in the crushing chamber 13, and its two ends are rotatably mounted on the housing 1. Multiple crushing blades 16 are arranged sequentially along the axial direction on the rotating shaft. The crushing motor is mounted on the housing 1 and connected to the upper end of the rotating shaft. The multiple crushing blades 16 on the two rotating shafts are arranged alternately.

[0050] During operation, the crushing motor is started. When the crushing motor comes into contact with the coal, the crushing blades 16 squeeze each other to discharge small-diameter coal powder. The two crushing motors control the two rotating shafts respectively, thereby controlling the rotation speed and direction of the crushing blades 16 on the two rotating shafts to optimize the crushing effect.

[0051] In this specific embodiment, the shredder blade 16 is made of special alloy steel.

[0052] The transmission cavity includes a cylindrical cavity 11 and a conical cavity 12 arranged sequentially from front to back. The front end of the cylindrical cavity 11 is connected to the outlet at the rear end of the cutter head housing 5, and the rear end of the conical cavity 12 is connected to the crushing cavity 13. The cross-sectional area of ​​the conical cavity 12 gradually increases from front to back, and the cross-section of the frontmost part of the conical cavity 12 is the same as the cross-section of the cylindrical cavity 11. In this embodiment, the cylindrical cavity 11 is a cylindrical cavity.

[0053] The second support is located at the connection between the cylindrical cavity 11 and the conical cavity 12, and the transmission motor 15 is located in the conical cavity 12. By connecting the cylindrical cavity 11, which is equipped with the screw 14, and the crushing cavity 13 through the conical cavity 12, the cut coal body can be smoothly transitioned and continuously crushed.

[0054] The moving mechanism includes a moving track 2 and a track motor. The moving track 2 is located at the bottom of the housing 1, and the track motor is used to drive the moving track 2 to move. The moving track 2 is controlled by the track motor to realize the movement and steering of the entire equipment.

[0055] The coal reservoir physical fluidization mining integrated equipment 100 in this embodiment is equipped with mobile tracks 2, which can move and turn autonomously in the roadway, improving the mobility and flexibility of the equipment, enabling intelligent unmanned mining of coal mines, and improving the safety of coal mining.

[0056] In this embodiment, the cutterhead motor, water pump motor 4, transmission motor 15, crushing motor, and track motor are all high-power motors to ensure the continuity and efficiency of the equipment during tunnel excavation.

[0057] For a near-horizontal, soft coal seam 200, in order for the coal-water mixture 700 to flow back to the bottom of the mine along the roadway, the direction of travel of the coal reservoir physical fluidization mining integrated equipment 100 needs to have a certain dip angle with the dip of the coal seam 200, and mining should be carried out along the upward dip of the coal seam 200; for an inclined coal seam 200, during the mining process, the direction of travel of the coal reservoir physical fluidization mining integrated equipment 100 needs to be consistent with the dip of the coal seam 200, and mining should be carried out along the upward dip of the coal seam 200.

[0058] like Figure 4 As shown, this embodiment also provides a method for using the integrated physical fluidization mining equipment 100 for coal reservoirs, including the following steps:

[0059] Step 1: Construct a vertical shaft 300 down to the coal seam 200 to be mined. The diameter of the shaft 300 does not need to be too large. Excavate a storage tank 500 at the bottom of the shaft 300 to receive the coal-water mixture 700 after mining. A pumping system 600 is installed near the storage tank 500 to transport the coal-water mixture 700 from the bottom of the storage tank 500 to the surface for separation. A shaft hoisting system 400 is erected at the wellhead to enable the rapid deployment of the integrated physical fluidization mining equipment 100 for coal reservoirs.

[0060] Step 2: Using the vertical shaft hoisting system 400, the coal reservoir physical fluidization mining integrated equipment 100 is transported to a predetermined position in the shaft 300, ensuring that the coal reservoir physical fluidization mining integrated equipment 100 is close to the coal seam 200, so that the cutting disc 6 of the coal reservoir physical fluidization mining integrated equipment 100 faces the coal seam 200, so as to efficiently carry out contact and preliminary cutting operations on the coal seam 200.

[0061] Step 3: After the cutting disc 6 of the integrated physical fluidization mining equipment 100 contacts the coal seam 200, the cutting disc drive assembly is activated, i.e., the cutting disc motor is started, causing the cutting disc 6 to rotate and continuously and stably cut the coal seam 200 along a certain upward mining route. Simultaneously, the water supply assembly, transmission mechanism, and crushing mechanism are activated synchronously, i.e., the water pump motor 4, transmission motor 15, and crushing motor start simultaneously. The high-pressure water flow and the cutting disc 6 work synchronously; this dual-action mechanism not only significantly improves the efficiency of coal mining and crushing but also ensures the initial refinement of coal particles.

[0062] Step 4: The coal powder particles generated during the cutting process are transported to the crushing mechanism via a conveying mechanism, where the crushing mechanism further refines the coal powder.

[0063] Step 5: The crushed coal powder is then discharged behind the coal reservoir physical fluidization mining integrated equipment 100 and falls into the roadway. The water jet generated at the front end of the coal reservoir physical fluidization mining integrated equipment 100 forms a water flow in the roadway, which transforms the coal powder behind the coal reservoir physical fluidization mining integrated equipment 100 into a fluidized coal-water mixture 700, improving the fluidity of the coal powder. Under the inclination of the roadway, the coal-water mixture 700 is driven by the water flow and continuously flows towards the rear of the mining area, eventually concentrating and falling at the shaft 300.

[0064] Step Six: The coal-water mixture 700 falls through the shaft 300 into the storage tank 500 at the bottom of the shaft 300, and is then transported to the surface by the pumping system 600. Subsequently, the coal, water and coalbed methane are separated and collected by the coal-water-gas three-phase separation device 800, thus completing the entire process of in-situ fluidized bed mining of coal and coalbed methane.

[0065] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for using an integrated physical fluidization mining equipment for coal reservoirs, characterized in that, The integrated physical fluidization mining equipment for coal reservoirs includes a shell, a mining mechanism, a water jet mechanism, a conveying mechanism, a crushing mechanism, and a moving mechanism. The mining mechanism includes a cutterhead shell, a cutting cutterhead, a cutterhead drive assembly, and a roller cutter assembly. The cutterhead shell is located at the front end of the shell, and the cutting cutterhead is rotatably mounted at the front end of the cutterhead shell. The cutterhead drive assembly is located within the cutterhead shell and drives the cutting cutterhead to rotate. The roller cutter assembly is located at the front end of the cutting cutterhead. The cutting cutterhead has multiple feed holes and multiple mounting holes. The water jet... The jetting mechanism includes a water supply assembly and multiple water jet nozzles. Each mounting hole is provided with one water jet nozzle. The water supply assembly is disposed on the housing and is used to supply water to the water jet nozzles. The housing is provided with a transmission chamber and a crushing chamber from front to back. The front end of the transmission chamber is connected to the outlet at the rear end of the cutter disc housing. One end of the transmission mechanism is installed in the cutter disc housing and the other end is installed in the transmission chamber. The crushing mechanism is disposed in the crushing chamber. The rear end of the housing is provided with a discharge port corresponding to the position of the crushing chamber. The moving mechanism is disposed at the bottom of the housing. The usage method includes the following steps: Step 1: Construct a vertical shaft down to the coal seam to be mined, excavate a storage pit at the bottom of the shaft, and build a shaft hoisting system at the shaft opening; Step 2: Use the vertical shaft hoisting system to transport the integrated physical fluidization mining equipment for coal reservoirs to a predetermined position in the shaft, ensuring that the integrated physical fluidization mining equipment for coal reservoirs is close to the coal seam, so that the cutting head of the integrated physical fluidization mining equipment for coal reservoirs faces the coal seam; Step 3: When the cutting disc of the integrated physical fluidization mining equipment for coal reservoirs contacts the coal seam, the cutting disc drive assembly is activated, causing the cutting disc to rotate and cut the coal seam along a certain upward mining route; at the same time, the water supply assembly, the transmission mechanism and the crushing mechanism are activated synchronously. Step 4: The coal powder particles generated during the cutting process are transported to the crushing mechanism through the conveying mechanism, and the crushing mechanism further refines the coal powder. Step 5: The crushed coal powder is then discharged to the rear of the integrated physical fluidization mining equipment for coal reservoirs and falls into the roadway. The water jet generated at the front end of the integrated physical fluidization mining equipment for coal reservoirs forms a water flow in the roadway, which transforms the coal powder behind the integrated physical fluidization mining equipment for coal reservoirs into a fluidized coal-water mixture. Under the inclination of the roadway, the coal-water mixture is driven by the water flow and continuously flows towards the rear of the mining area, eventually concentrating and falling at the shaft. Step 6: The coal-water mixture falls into the storage tank at the bottom of the well shaft through the well shaft, and is then transported to the surface by a pumping system; subsequently, the coal, water, and coalbed methane are separated and collected by a coal-water-gas three-phase separation device.

2. The method of using the integrated physical fluidization mining equipment for coal reservoirs according to claim 1, characterized in that, A support frame is provided in the cutter head housing, and the central shaft at the rear end of the cutting cutter head is rotatably mounted on the support frame via a bearing. The cutter head drive assembly is used to drive the central shaft to rotate.

3. The method of using the integrated physical fluidization mining equipment for coal reservoirs according to claim 2, characterized in that, The cutter head drive assembly includes a cutter head motor and a transmission gearbox. Both the cutter head motor and the transmission gearbox are located in the upper part of the cutter head housing. The cutter head motor is connected to the power input end of the transmission gearbox, and the power output end of the transmission gearbox is connected to the central shaft.

4. The method of using the integrated physical fluidization mining equipment for coal reservoirs according to claim 1, characterized in that, Multiple hob sets include multiple single-edged hobs and multiple double-edged hobs.

5. The method of using the integrated physical fluidization mining equipment for coal reservoirs according to claim 1, characterized in that, The water supply assembly includes a water pump, a water pump motor, a rotary joint, a main hose, and multiple branch hoses. The water pump and the water pump motor are both located on the upper part of the housing. The water pump motor is used to drive the water pump. One end of the main hose is connected to the outlet of the water pump through the rotary joint. The other end of the main hose is connected to multiple branch hoses. The end of each branch hose away from the main hose is connected to a water jet nozzle.

6. The method of using the integrated physical fluidization mining equipment for coal reservoirs according to claim 1, characterized in that, The transmission mechanism includes a first support, a second support, a screw, and a transmission motor. The first support is located in the lower part of the cutter head housing, and the second support is located at one end of the transmission chamber near the crushing chamber. The two ends of the screw are rotatably mounted in the first support and the second support, respectively. The transmission motor is located on the second support and is used to drive the screw to rotate.

7. The method of using the integrated physical fluidization mining equipment for coal reservoirs according to claim 1, characterized in that, The crushing mechanism includes two crushing components, which are arranged sequentially from left to right in the crushing chamber. Each crushing component includes a crushing motor, a rotating shaft, and multiple crushing blades. The rotating shaft is vertically arranged in the crushing chamber, and its two ends are rotatably mounted on the housing. Multiple crushing blades are arranged sequentially along the axial direction on the rotating shaft. The crushing motor is mounted on the housing and connected to the upper end of the rotating shaft. The multiple crushing blades on the two rotating shafts are arranged alternately.

8. The method of using the integrated physical fluidization mining equipment for coal reservoirs according to claim 1, characterized in that, The transmission cavity includes a cylindrical cavity and a conical cavity arranged sequentially from front to back. The front end of the cylindrical cavity is connected to the outlet at the rear end of the cutter head housing, and the rear end of the conical cavity is connected to the crushing cavity. The cross-sectional area of ​​the conical cavity gradually increases from front to back, and the cross-section of the frontmost part of the conical cavity is the same as the cross-section of the cylindrical cavity.

9. The method of using the integrated physical fluidization mining equipment for coal reservoirs according to claim 1, characterized in that, The moving mechanism includes a moving track and a track motor. The moving track is disposed at the bottom of the housing, and the track motor is used to drive the moving track to move.

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