Compacted regenerated coal body structure device for coal mine secondary mining working face

Abstract

The invention provides a compaction regenerated coal body structure device for a coal mine secondary mining working face. The compaction regenerated coal body structure device comprises a working frame, a transmission structure, a pulley structure and a compaction structure, the transmission structure is arranged on the working frame, one end of the transmission structure is movably connected with the pulley structure, the other end of the transmission structure is movably connected with the compaction structure, and a loading end and an unloading end are arranged at one end, close to the pulley structure, of the pulley structure and one end, close to the pulley structure, of the transmission structure respectively. Pressure is applied to the unloading end, and the compaction structure is driven by the transmission structure to relieve the pressure. And the compaction structure is used for applying pressure and releasing pressure to the crushed coal and rock mass in the mold. The device provided by the invention solves the problem faced by the research of the properties of the coal body on the residual coal re-mining working face, provides experimental conditions for exploring the disaster-causing factors of the regenerated coal body on the re-mining working face, and reconstructs the regenerated coal body formed by the caving coal rock body of the coal mine goaf under the compaction action of the overlying load. Further, experimental conditions are provided for exploring the properties of the regenerated coal body on the residual coal re-mining working face.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine re-mining, and in particular to a device for reconstructing a compacted and regenerated coal body on a coal mine re-mining working face. Background Art

[0002] Energy is an important material basis for my country's economic development. With the increase of my country's population and the improvement of its development level, the demand for energy has gradually increased. Coal reserves account for as much as 94% of all fossil energy reserves in my country, far exceeding other fossil energy sources. In the past, due to relatively complex geological conditions and low production levels, there were a large number of abandoned high-quality coal resources in many coal mine goafs. Under the policy guidance of comprehensive utilization of coal resources, energy conservation and emission reduction, and safe production, relevant coal mines have set up re-mining working faces to carry out the re-mining of legacy coal. There are many safety problems in the re-mining of legacy coal, such as harmful gases, water accumulation, ignition of legacy coal, and roof accidents. The study of the properties of compacted coal in goafs is of great significance for the prevention and control of disasters in the re-mining process of legacy coal. Many scholars have carried out experiments on the structural reorganization of broken coal and rock mass by constructing equipment for reorganizing broken coal and rock mass, and have achieved many excellent results. However, the existing equipment has problems such as low test efficiency, inaccurate results and high cost. The research on the equipment for re-mining working faces to re-compact and regenerate coal mass is still in the stage of continuous experimentation and exploration.

[0003] Based on this, in order to achieve low-cost, high-efficiency and high-reduction reconstruction of the re-mining working face compacted and regenerated coal body, the present invention proposes a coal mine re-mining working face compacted and regenerated coal body reconstruction device, which effectively solves the difficulties faced by the coal body property research of the re-mining working face of abandoned coal, and provides experimental conditions for exploring the disaster-causing factors of the regenerated coal body in the re-mining working face. Summary of the invention

[0004] The purpose of the present invention is to provide a device for reconstructing the compacted and regenerated coal body of a coal mine re-mining working face, which can realize low-cost, high-efficiency and high-reduction reconstruction of the compacted and regenerated coal body of the re-mining working face, solves the difficult problems faced by the research on the properties of the coal body of the re-mining working face of residual coal, provides experimental conditions for exploring the disaster-causing factors of the regenerated coal body of the re-mining working face, reconstructs the regenerated coal body formed by the collapsed coal rock mass in the coal mine goaf under the compaction action of the overlying load, and further provides experimental conditions for exploring the properties of the regenerated coal body of the re-mining working face of residual coal, and has good practicality and innovation.

[0005] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is specifically as follows: the present invention provides a coal mine re-mining working face compaction regeneration coal body reconstruction device, including a working frame, a transmission structure, a pulley structure and a compaction structure;

[0006] The transmission structure is arranged on the working frame and one end of the transmission structure is movably connected to the pulley structure, and the other end of the transmission structure is movably connected to the compaction structure. The pulley structure and the end of the transmission structure close to the pulley structure are respectively provided with a loading end and an unloading end. By applying pressure on the loading end, the compaction structure is driven to apply pressure through the transmission structure, and by applying pressure on the unloading end, the compaction structure is driven to release pressure through the transmission structure.

[0007] The compacting structure comprises a pressure rod movably connected to the transmission structure and a plurality of moulds arranged on a working frame. When the compacting structure is working, the pressure rod can apply pressure to and release pressure on the broken coal and rock mass in the mould.

[0008] Preferably, the transmission structure includes a connecting rod whose top is fixed on the top beam of the work frame, an upper slider is hinged at the bottom of the connecting rod, the upper slider is slidably connected to the upper end surface of the lever and can be self-locked, and the lower end surface of the lever is slidably connected to the lower slider, and the lower slider can be self-locked at the lower end surface of the lever. The lever is provided with a guide rail adapted to the upper and lower sliders, and the guide rail can be selected from existing T-slots or grooves, etc. The adaptation method of the upper and lower sliders to the guide rails can be selected from existing technologies, with reference to the structure of a CNC machining center and a milling machine.

[0009] Preferably, the pulley structure includes a fixed pulley and two movable pulleys fixed on the top beam of the work frame, the fixed ends of the fixed pulley and the pulley group adapted for the steel wire rope are fixed to one end of the lever, the movable end of the steel wire rope on the pulley structure is connected to the loading end, and the bottom of one end of the lever close to the pulley structure is connected to the unloading end.

[0010] Preferably, the loading end uses a loading weight plate, and the unloading end uses an unloading weight plate, and the unloading weight plate is connected to the bottom of the lever through a steel wire rope.

[0011] Preferably, the upper end surface and the lower end surface of the lever are both provided with guide rails for adapting the upper slider and the lower slider.

[0012] Preferably, the compaction structure includes a chassis fixed on the bottom plate of the working frame and a plurality of molds fixed on the chassis. The mold is a cylinder with a double-opening structure design. An upper cap and a lower cap are respectively installed at the upper and lower openings of the mold. The lower cap has a small hole for ventilation. The lower end of the pressure rod is connected to a plurality of support rods respectively used to apply pressure to each upper cap.

[0013] Preferably, the mold can be split into two semi-cylindrical shell parts, a plurality of bolt holes are respectively arranged between the two parts, and the two semi-cylindrical shell parts are connected and fixed by bolts.

[0014] Preferably, the semi-cylindrical shell portion of the mold comprises two layers, an inner layer and an outer layer, wherein an interlayer is provided between the inner layer and the outer layer, and a thermal insulation film is arranged in the interlayer.

[0015] Preferably, the work frame is an I-shaped structure, and its top beam and bottom plate are fixedly connected by columns.

[0016] Preferably, the upper cover cap is also provided with a stress and displacement sensor.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Optimization of pressure transmission efficiency: Compared with previous equipment, this equipment uses two movable pulleys + one fixed pulley for consolidation loading, which greatly reduces the number of pulleys used, reduces friction loss, and increases pressure transmission efficiency.

[0019] 2. Optimize the pressure amplification multiple; Combined with the input force amplification principle of unequal-arm lever and pulley group, a method combining lever and pulley is designed to amplify the input force. This method inherits the advantage of lever that can amplify the input force many times, and abandons the disadvantage of pulley group that can only double the input force. It also greatly reduces the use of weights, reducing the test cost and workload.

[0020] 3. Optimize manufacturing efficiency; the combination of lever and pulley provides a greater input force amplification factor, and can provide greater consolidation force to the specimen with fewer weights. Therefore, two or more molds are arranged under the pressure rod, which can consolidate two or more specimens at one time, and several consolidation molding systems are installed at different positions on one end of the lever resistance arm. Different resistance action lines can realize the compaction and consolidation of multiple specimens with different output forces at the same time, which greatly improves the manufacturing efficiency and preserves the integrity of the specimen; an unloading weight plate is installed at the lower side of the lever power arm. After the consolidation test is completed, the pressure rod can be directly lifted out by placing weights here, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0022] Figure 1 It is a structural schematic diagram of a device for reconstructing a coal body by compacting and regenerating a coal face in a coal mine according to an embodiment of the present invention;

[0023] Figure 2 Schematic diagram of the structure of a mold according to an embodiment of the present invention.

[0024] Among them, 1-top beam, 2-column, 3-bottom plate, 4-lever, 5-connecting rod, 51, upper slider, 52, lower slider, 6-loading end, 7-unloading end, 8-mold, 9-chassis, 10-pressure rod, 11-bolt, 12-lower cover cap, 13-upper cover cap, 14-stress and displacement sensor, 15-guide rail, 16-fixed pulley, 17-movable pulley, 18-thermal insulation film. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. Of course, the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0026] like Figure 1-Figure 2 As shown, an embodiment of the present invention provides a coal mine re-mining working face compaction regeneration coal body reconstruction device, including a working frame, a transmission structure, a pulley structure and a compaction structure;

[0027] The transmission structure is arranged on the working frame and one end of the transmission structure is movably connected to the pulley structure, and the other end of the transmission structure is movably connected to the compaction structure. The pulley structure and the end of the transmission structure close to the pulley structure are respectively provided with a loading end 6 and an unloading end 7. In this embodiment, the loading end 6 uses a loading weight plate, and the unloading end 7 uses an unloading weight plate. By adding weights to the loading weight plate to apply pressure, the compaction structure is driven to apply pressure through the transmission structure. By adding weights to the unloading weight plate to apply pressure, the compaction structure is driven to unload pressure through the transmission structure.

[0028] The compaction structure includes a pressure rod 10 movably connected to the transmission structure and a plurality of molds 8 arranged on a working frame. When the compaction structure is working, the pressure rod 10 can apply pressure to and release pressure on the broken coal and rock mass in the mold 8.

[0029] The transmission structure includes a connecting rod 5 whose top is fixed on the top beam 1 of the work frame, and an upper slider 51 is hinged at the bottom of the connecting rod 5. The upper slider 51 is slidably connected to the upper end surface of the lever 4 and can self-lock in position, and the lower end surface of the lever 4 is slidably connected to the lower slider 52, and the lower slider 52 can self-lock in position at the lower end surface of the lever 4.

[0030] The pulley structure includes a fixed pulley 16 and two movable pulleys 17 fixed on the work frame top beam 1. The fixed ends of the fixed pulley 16 and the pulley group 17 adapted to the steel wire rope are fixed to one end of the lever 4. The movable end of the steel wire rope on the pulley structure is connected to the loading end 6. The bottom of one end of the lever 4 close to the pulley structure is connected to the unloading end 7.

[0031] The unloading weight plate is connected to the bottom of the lever 4 through a steel wire rope.

[0032] The upper end surface and the lower end surface of the lever 4 are both provided with guide rails 15 for adapting the upper slider 51 and the lower slider 52 .

[0033] The compaction structure includes a chassis 7 fixed on the work frame bottom plate 3 and a plurality of molds 8 fixed on the chassis 7. The mold 8 is a cylinder with a double-opening structure. An upper cap 13 and a lower cap 12 are respectively installed at the upper and lower openings of the mold 8. The lower cap 12 has a small hole for ventilation. The lower end of the pressure rod 10 is connected to a plurality of support rods for applying pressure to each upper cap 13.

[0034] The mold 8 can be split into two semi-cylindrical shell parts, and a plurality of bolt holes are respectively arranged between the two parts, which are connected and fixed by bolts 11.

[0035] The semi-cylindrical shell part of the mold 8 is divided into two layers, an inner layer and an outer layer, between which there is an interlayer, and a heat-insulating film 18 is arranged in the interlayer.

[0036] The work frame is an I-shaped structure, and its top beam 1 and bottom plate 3 are fixedly connected by a column 2.

[0037] The upper cover cap 13 is also provided with a stress and displacement sensor 14 .

[0038] The specific test steps are as follows:

[0039] First, the prepared broken coal and rock mass is loaded into the mold 8. After reaching the designed height, it is compacted to the specified position by a compacting hammer. Then the mold 8 and the chassis 9 are fixedly installed at the corresponding positions of each support plate. The positions of the upper slider 51 and the lower slider 52 are adjusted and fixed according to the designed compaction force. An appropriate amount of weights are placed in the loading weight plate so that each support rod at the lower end of the pressure rod 10 just touches the upper cover cap 13. After it is stable, the corresponding weights are added according to the designed compaction and consolidation scheme of the broken coal and rock mass to apply compaction force. When the compaction standard is reached, the weights in the loading weight plate are removed to end the test. An appropriate amount of weights are placed in the loading weight plate to lift out the pressure rod 10 and each support rod. After disassembling the mold 8 from the chassis, the mold 8 is placed horizontally and the bolts 11 are removed to take out the complete sample to obtain the reconstructed re-mining working face compacted and regenerated coal body.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for reconstructing compacted and regenerated coal bodies at a coal mine re-mining working face, characterized in that: It includes a working frame, a transmission structure, a pulley structure and a compacting structure; The transmission structure is arranged on the working frame and one end of the transmission structure is movably connected to the pulley structure, and the other end of the transmission structure is movably connected to the compaction structure. The pulley structure and the end of the transmission structure close to the pulley structure are respectively provided with a loading end (6) and an unloading end (7). By applying pressure on the loading end (6), the compaction structure is driven to apply pressure through the transmission structure, and by applying pressure on the unloading end (7), the compaction structure is driven to release pressure through the transmission structure. The compaction structure comprises a pressure rod (10) movably connected to a transmission structure and a plurality of molds (8) arranged on a working frame. When the compaction structure is working, the pressure rod (10) can apply pressure to and release pressure on the crushed coal and rock mass in the mold (8).

2. A device for reconstructing coal body by compacting and regenerating coal at a coal mine re-mining working face according to claim 1, characterized in that: The transmission structure comprises a connecting rod (5) whose top is fixed on a top beam (1) of a work frame, an upper slider (51) being hinged at the bottom of the connecting rod (5), the upper slider (51) being slidably connected to the upper end surface of a lever (4) and capable of self-locking in position, and a lower slider (52) being slidably connected to the lower end surface of the lever (4), and the lower slider (52) being capable of self-locking in position at the lower end surface of the lever (4).

3. A device for reconstructing coal body by compacting and regenerating coal at a coal mine re-mining working face according to claim 2, characterized in that: The pulley structure comprises a fixed pulley (16) and two movable pulleys (17) fixed on the top beam (1) of the work frame, the fixed ends of the steel wire ropes on the fixed pulley (16) and the pulley block (17) are fixed to one end of the lever (4), the movable end of the steel wire rope on the pulley structure is connected to the loading end (6), and the bottom of one end of the lever (4) close to the pulley structure is connected to the unloading end (7).

4. A device for reconstructing coal body by compacting and regenerating coal at a coal mine re-mining working face according to claim 3, characterized in that: The loading end (6) is a loading weight plate, and the unloading end (7) is an unloading weight plate. The unloading weight plate is connected to the bottom of the lever (4) via a steel wire rope.

5. The device for reconstructing the compacted and regenerated coal body of a coal mine re-mining working face according to claim 1 is characterized in that: The upper end surface and the lower end surface of the lever (4) are both provided with guide rails (15) for matching the upper slider (51) and the lower slider (52).

6. The device for reconstructing coal body by compacting and regenerating coal at a coal mine re-mining working face according to claim 1, characterized in that: The compacting structure comprises a chassis (7) fixed on a bottom plate (3) of a working frame and a plurality of molds (8) fixed on the chassis (7). The mold (8) is a cylinder, and adopts a double-opening structure design. The upper and lower openings of the mold (8) are respectively installed with an upper cover cap (13) and a lower cover cap (12), and the lower cover cap (12) is opened with a small hole for ventilation. The lower end of the pressure rod (10) is connected to a plurality of support rods for applying pressure to each upper cover cap (13).

7. A device for reconstructing coal body by compacting and regenerating coal at a coal mine re-mining working face according to claim 6, characterized in that: The mold (8) can be split into two semi-cylindrical shell parts, a plurality of bolt holes are respectively arranged between the two parts, and the two semi-cylindrical shell parts are connected and fixed by bolts (11).

8. The device for reconstructing coal body by compacting and regenerating coal at a coal mine re-mining working face according to claim 6, characterized in that: The semi-cylindrical shell part of the mold (8) comprises an inner and outer layer, an interlayer is provided between the inner and outer layers, and a heat-insulating film (18) is arranged in the interlayer.

9. The device for reconstructing coal body by compacting and regenerating coal at a coal mine re-mining working face according to claim 1, characterized in that: The working frame is an I-shaped structure, and its top beam (1) and bottom plate (3) are fixedly connected via a column (2). The device for reconstructing the compacted and regenerated coal body of a coal mine re-mining working face according to claim 6 is characterized in that: The upper cover cap (13) is also provided with a stress and displacement sensor (14).

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