Method for controlling paste filling mining surrounding rock of full-height strip during one-time mining of thick coal seam

Abstract

The invention relates to the technical field of mining, in particular to a thick coal seam full-height strip paste filling mining surrounding rock control method which comprises an upper layer filling body, a lower layer unmined ore and a goaf located between the upper layer filling body and the lower layer unmined ore. The retaining wall is located between the upper layered filling body and the lower layered unmined ore and located in the goaf, an observation pipe and a vent pipe are fixedly connected to the retaining wall in a penetrating mode, a valve is installed on the observation pipe, paste can be conveniently filled into the goaf through cooperation of the retaining wall, the vent pipe, the filling pipe and the like, and the filling pipe can be conveniently clamped through cooperation of an electric cylinder, a clamping plate and the like; and the motor can conveniently drive the threaded shaft to rotate, the threaded shaft can conveniently drive the sliding block, the clamping plate, the filling pipe and the like to move, the interior of the goaf is conveniently filled, the filling effect is improved, the filling speed is increased, the safety is improved, and practicability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mining, and in particular to a method for controlling surrounding rock in a thick coal seam by one-time mining of full-height strip paste filling. Background Art

[0002] Paste-filling mining is a mining method that is particularly effective in controlling ore loss. During the mining process of a chamber or block, as the mining face advances, filling material is delivered to the goaf, thereby achieving the goals of ground pressure management and controlling surrounding rock collapse and surface subsidence. Paste-filling mining methods include upward and downward paste-filling mining methods. The downward paste-filling mining method is not only effective in controlling ore loss, surrounding rock collapse, and surface subsidence, but also in improving working roof conditions. Therefore, as mining depth continues to increase, the stability of the ore rock gradually deteriorates, and the downward paste-filling mining method will be applied in more mines.

[0003] After searching, the utility model patent with Chinese patent publication (announcement) number CN207363699U discloses a device for improving the filling and roof connection rate of the downward paste filling mining method. The device is roughly described as including a retaining wall, a filling pipe, an observation pipe, an exhaust pipe, and a gate valve. When in use, the device is suitable for mines that adopt the downward paste filling mining method, can greatly improve the paste filling and roof connection rate, improve the filling and roof connection effect, effectively control the surrounding rock collapse, and provide safe and reliable roof conditions for mining operations, especially providing a safe and reliable technical means for future deep well mining. However, the above device still has certain shortcomings. For example, the above device is not convenient for moving the filling pipe, the filling effect is poor, and it is only convenient for filling near the retaining wall. Although the paste is fluid, the flow will increase the filling time and will also cause incomplete filling in the goaf, resulting in unsatisfactory filling effect, failure to achieve a good effect, and causing safety hazards. To this end, we propose a method for controlling surrounding rock in paste filling mining of full-height strips in a thick coal seam. Summary of the Invention

[0004] (1) Technical problems solved In response to the shortcomings of the existing technology, the present invention provides a method for controlling the surrounding rock by filling and mining full-height strips of thick coal seams at one time, so as to solve the problem that the existing technology proposed in the background technology is not convenient for moving the filling pipe, the filling effect is poor, and it is only convenient for filling near the retaining wall. Although the paste is fluid, the flow will increase the filling time and will also lead to incomplete filling in the goaf, resulting in unsatisfactory filling effect, failure to achieve good results, and causing safety hazards.

[0005] (2) Technical solution To achieve the above-mentioned object, the present invention provides the following technical solution: a method for controlling surrounding rock by using paste filling to mine thick coal seams in one go, comprising an upper layer filling body, a lower layer of unmined rock, and a goaf, wherein the goaf is located between the upper layer filling body and the lower layer of unmined rock, and further comprising: A retaining wall, the retaining wall being located between the upper layer filling body and the lower layer unmined ore, the retaining wall being located in the goaf, an observation tube and a vent tube being fixedly connected through the retaining wall, and a valve being installed on the observation tube; The cam is provided with a plurality of extension rods, the extension rods being fixedly connected to the support base, the support base being fixedly connected to the support cylinder, the support cylinder being slidably connected to the support rod, the support rod being fixedly connected to the support base, the support rod being provided with a plurality of limiting grooves, the support rod being threadedly connected to the limiting rod, the limiting rod being located in one of the limiting grooves, the support base being provided with a slide groove, the slide groove being slidably connected to the slide groove, the support base being provided with a motor, the slide groove being rotatably connected to the threaded shaft, the slide groove being threadedly connected to the threaded shaft, the output end of the motor being inserted into the slide groove and fixedly connected to the threaded shaft, the filling pipe being slidably connected in the opening, the slide groove being fixedly connected to two support plates, the support plate being penetrated by an electric cylinder, and the output end of the electric cylinder being fixedly connected to a splint for filling; The supporting mechanism is arranged on the retaining wall and is used for supporting.

[0006] Preferably, the support mechanism includes a stabilizing ring, which is sleeved on the filling tube, and a plurality of pulleys are fixedly connected inside the stabilizing ring, and a plurality of connecting plates are fixedly connected to the stabilizing ring, and a mounting plate is fixedly connected to the connecting plate, and the mounting plate is detachably connected to the retaining wall by a plurality of bolts to improve the support stability.

[0007] Furthermore, four connecting plates 2 are fixedly connected to the support seat, and the four connecting plates 2 form a group of two, and a stabilizing plate is fixedly connected to two of the connecting plates 2.

[0008] Furthermore, two bottom plates are fixedly connected to the base, and two fixing nails are slidably connected to the two bottom plates, and the fixing nails are nailed into the unmined ore in the lower layer. A top plate 1 is fixedly connected to the base and the two bottom plates, and a top plate 2 is fixedly connected between the top plate 1 and the bottom plate.

[0009] Furthermore, two guide shafts are fixedly connected in the sliding groove, and the sliding block is slidably connected to the two guide shafts.

[0010] Based on the above solution, two stabilizing rods are fixedly connected to the splint, two stabilizing holes are provided on the support plate, the stabilizing rods are slidably connected in the stabilizing holes, and a stabilizing frame is fixedly connected to the slider and the two support plates.

[0011] Preferably, based on the above solution, an anti-slip pad is fixedly connected to the splint.

[0012] A method for controlling surrounding rock in a thick coal seam by using paste filling for full-height strip mining at one time comprises the following steps: S1. The electric cylinder drives the splint to clamp the filling pipe. The motor drives the slider to move through the threaded shaft. The slider drives the splint, filling pipe, etc. to move. In this way, the position of the filling pipe can be moved. The inside of the goaf can be filled first, and the filling pipe can be slowly moved for filling. This can improve the filling effect and improve safety.

[0013] (3) Beneficial effects Compared with the prior art, the present invention provides a method for controlling surrounding rock in thick coal seams by mining the entire coal seam in one go with paste filling, which has the following beneficial effects: This method of controlling surrounding rock by one-time mining of full-height strip paste filling in thick coal seams facilitates filling paste into the goaf through the cooperation of retaining walls, air vents, filling pipes, etc., and facilitates clamping of the filling pipe through the cooperation of electric cylinders, splints, etc., facilitates the motor to drive the threaded shaft to rotate, facilitates the threaded shaft to drive the slider, splint, filling pipe, etc. to move, and facilitates filling the interior of the goaf, thereby improving the filling effect, filling speed and safety, and improving practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the three-dimensional structure of this application; Figure 2 A schematic diagram of a partially cutaway three-dimensional structure of this application; Figure 3 This is a schematic diagram of the three-dimensional structure of the support seat, base, etc. of this application; Figure 4 This is a schematic diagram of the three-dimensional structure of the support plate, anti-slip mat, etc. of this application; Figure 5 This is a schematic diagram of the three-dimensional structure of the slider, threaded shaft, etc. of this application; Figure 6 This is a schematic diagram of the three-dimensional structure of the connecting plate 1, the mounting plate, etc. of this application; Figure 7 For this application Figure 2 Schematic diagram of the local enlarged structure at A in the middle; Figure 8 For this application Figure 3 Schematic diagram of the local enlarged structure at point B in the middle.

[0015] In the figure: 1. Upper layer filling body; 2. Lower layer unmined ore; 3. Goaf; 4. Retaining wall; 5. Observation tube; 6. Ventilation tube; 7. Base; 8. Telescopic rod; 9. Support seat; 10. Support cylinder; 11. Support rod; 12. Limit rod; 13. Slider; 14. Motor; 15. Threaded shaft; 16. Filling tube; 17. Support plate; 18. Electric cylinder; 19. Clamp; 20. Stabilizing ring; 21. Pulley; 22. Connecting plate 1; 23. Mounting plate; 24. Connecting plate 2; 25. Stabilizing plate; 26. Bottom plate; 27. Fixing nail; 28. Top plate 1; 29. ​​Guide shaft; 30. Stabilizing rod; 31. Stabilizing frame; 32. Anti-slip pad. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0017] See also Figures 1-8 A method for controlling surrounding rock in a thick coal seam by using paste filling in a single mining operation, comprising an upper layer filling body 1, a lower layer unmined rock 2, and a goaf 3, wherein the goaf 3 is located between the upper layer filling body 1 and the lower layer unmined rock 2, and further comprising: Retaining wall 4, which is located between the upper layer filling body 1 and the lower layer unmined ore 2, and is located in the goaf 3. An observation tube 5 and a vent tube 6 are fixedly connected to the retaining wall 4, and a valve is installed on the observation tube 5; The filling mechanism includes an opening and a base 7. The opening is opened on the retaining wall 4. The base 7 is located above the lower layer of unmined ore 2. A plurality of telescopic rods 8 are installed on the base 7. A plurality of telescopic rods 8 are fixedly connected to a support seat 9. A support cylinder 10 is fixedly connected to the base 7. A support rod 11 is slidably connected in the support cylinder 10. The support rod 11 is fixedly connected to the support seat 9. A plurality of limit grooves are opened on the support rod 11. A limit rod 12 is threadedly connected to the support seat 9. The limit rod 12 is located in one of the limit grooves. A slide groove is opened on the support seat 9. , a slider 13 is slidably connected in the chute, a motor 14 is installed on the support seat 9, a threaded shaft 15 is rotatably connected in the chute, the slider 13 is threadedly connected to the threaded shaft 15, the output end of the motor 14 passes through the chute and is fixedly connected to the threaded shaft 15, a filling tube 16 is slidably connected in the opening, two support plates 17 are fixedly connected to the slider 13, an electric cylinder 18 is installed on the support plate 17, and a clamping plate 19 is fixedly connected to the output end of the electric cylinder 18. The motor 14, the clamping plate 19, etc. are used to move the filling tube 16 to improve the filling effect; The supporting mechanism is arranged on the retaining wall 4. The supporting mechanism includes a stabilizing ring 20. The stabilizing ring 20 is sleeved on the filling tube 16. A plurality of pulleys 21 are fixedly connected inside the stabilizing ring 20. A plurality of connecting plates 22 are fixedly connected to the stabilizing ring 20. A mounting plate 23 is fixedly connected to the connecting plate 22. The mounting plate 23 is detachably connected to the retaining wall 4 through a plurality of bolts, so as to support the filling tube 16 and improve the stability of the filling tube 16.

[0018] Four connecting plates 24 are fixedly connected to the support seat 9 , and the four connecting plates 24 form a group of two. A stabilizing plate 25 is fixedly connected to two connecting plates 24 for supporting the filling pipe 16 to make the filling pipe 16 more stable.

[0019] Two bottom plates 26 are fixedly connected to the base 7, and two fixing nails 27 are slidably connected to the two bottom plates 26. The fixing nails 27 are nailed into the lower layer of unmined ore 2. A top plate 1 28 is fixedly connected to the base 7 and the two bottom plates 26. A top plate 2 is fixedly connected between the top plate 1 28 and the bottom plates 26, which is used to fix the base 7 and support the retaining wall 4 to improve the firmness of the retaining wall 4.

[0020] Two guide shafts 29 are fixedly connected in the slide groove, and the slider 13 is slidably connected to the two guide shafts 29 to improve the stability of the slider 13, the support plate 17, etc.

[0021] Two stabilizing rods 30 are fixedly connected to the splint 19, and two stabilizing holes are opened on the support plate 17. The stabilizing rods 30 are slidably connected in the stabilizing holes. A stabilizing frame 31 is fixedly connected to the slider 13 and the two support plates 17. The stabilizing rods 30 are used to improve the stability of the splint 19, and the stabilizing frame 31 is used to improve the stability of the two support plates 17.

[0022] An anti-slip pad 32 is fixedly connected to the clamping plate 19 to increase friction.

[0023] A method for controlling surrounding rock in a thick coal seam by using paste filling for full-height strip mining at one time comprises the following steps: S1, the electric cylinder 18 drives the clamp 19 to clamp the filling tube 16, and the motor 14 drives the slider 13 to move through the threaded shaft 15, and the slider 13 drives the clamp 19, the filling tube 16, etc. to move, so that the position of the filling tube 16 can be moved. The interior of the goaf 3 can be filled first, and the filling tube 16 can be slowly moved for filling, which can improve the filling effect and improve safety.

[0024] It should be further explained that the motor 14 in this embodiment is a conventional device purchased on the market and known to those skilled in the art. The model can be selected or customized according to actual needs. In this patent, we only use it and do not improve its structure and function. For those skilled in the art, its setting method, installation method and electrical connection method only need to be debugged according to the requirements of its instruction manual. They will not be described in detail here. The motor 14 is provided with a control switch that matches it. The installation position of the control switch is selected according to actual use requirements to facilitate the operator to operate and control.

[0025] In summary, the working principle and working process of the method for controlling the surrounding rock of the thick coal seam by pasty filling and mining with full height strips at one time are as follows: when in use, the method for controlling the surrounding rock of the thick coal seam by pasty filling and mining with full height strips at one time is first placed at the desired location, and the motor 14 is connected to the forward and reverse circuit according to the corresponding instructions, and then the external pipeline is connected to the filling pipe 16, so that the paste preparation station conveys the paste, and the paste enters the goaf 3 through the filling pipe 16. At this time, if people need to move the filling pipe 16, they can start the electric cylinder 18 to make the splint 19 clamp the filling pipe 16, and then start the motor 14, and the motor 14 drives The threaded shaft 15 rotates, and the threaded shaft 15 drives the slider 13 to move, and the slider 13 drives the support plate 17 to move, and the support plate 17 drives the electric cylinder 18, the splint 19 and the filling tube 16 to move. In this way, through the clamping of the splint 19 and the cooperation of the motor 14, the threaded shaft 15, etc., the repeated movement of the filling tube 16 can be realized, and the filling tube 16 moves steadily in the opening and the stabilizing ring 20, so that the paste is evenly distributed in the goaf 3, thereby improving the filling effect. The cooperation of the telescopic rod 8, the support rod 11, the support tube 10, etc. makes it easy for the support seat 9 to be suitable for retaining walls 4 and filling tubes 16 of different heights, thereby improving practicality.

[0026] The above embodiments merely represent specific implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A method for controlling surrounding rock in a thick coal seam by full-height strip paste filling, comprising an upper layer filling body (1), a lower layer unmined ore (2) and a goaf (3), wherein the goaf (3) is located between the upper layer filling body (1) and the lower layer unmined ore (2), and is characterized in that: Also includes: A retaining wall (4), the retaining wall (4) being located between an upper layer filling body (1) and a lower layer unmined ore (2), the retaining wall (4) being located within a goaf (3), an observation tube (5) and a vent tube (6) being fixedly connected through the retaining wall (4), and a valve being installed on the observation tube (5); A filling mechanism, the filling mechanism comprising an opening and a base (7), the opening being opened on the retaining wall (4), the base (7) being located above the lower layer of unmined ore (2), a plurality of telescopic rods (8) being installed on the base (7), a plurality of telescopic rods (8) being fixedly connected to a support seat (9), a support tube (10) being fixedly connected to the base (7), a support rod (11) being slidably connected in the support tube (10), the support rod (11) being fixedly connected to the support seat (9), a plurality of limiting grooves being opened on the support rod (11), a limiting rod (12) being threadedly connected through the support seat (9), the limiting rod (12) being located In one of the limiting grooves, a slide groove is provided on the support seat (9), a slider (13) is slidably connected in the slide groove, a motor (14) is installed on the support seat (9), a threaded shaft (15) is rotatably connected in the slide groove, the slider (13) is threadedly connected to the threaded shaft (15), the output end of the motor (14) passes through the slide groove and is fixedly connected to the threaded shaft (15), a filling pipe (16) is slidably connected in the opening, two support plates (17) are fixedly connected to the slider (13), an electric cylinder (18) is installed through the support plate (17), and the output end of the electric cylinder (18) is fixedly connected to a clamping plate (19); A support mechanism is provided on the retaining wall (4) and is used for providing support.

2. The method for controlling surrounding rock in thick coal seam full-height strip paste filling mining according to claim 1, characterized in that: The support mechanism includes a stabilizing ring (20), the stabilizing ring (20) is sleeved on the filling tube (16), a plurality of pulleys (21) are fixedly connected inside the stabilizing ring (20), a plurality of connecting plates (22) are fixedly connected to the stabilizing ring (20), a mounting plate (23) is fixedly connected to the connecting plate (22), and the mounting plate (23) is detachably connected to the retaining wall (4) via a plurality of bolts.

3. The method for controlling surrounding rock in thick coal seam full-height strip paste filling mining according to claim 2, characterized in that: Four connecting plates (24) are fixedly connected to the support seat (9), and the four connecting plates (24) form a group of two. A stabilizing plate (25) is fixedly connected to two connecting plates (24).

4. The method for controlling surrounding rock in thick coal seam full-height strip paste filling mining according to claim 3, characterized in that: Two bottom plates (26) are fixedly connected to the base (7), and two fixing nails (27) are slidably connected to the two bottom plates (26). The fixing nails (27) are nailed into the lower layer of unmined ore (2). A top plate 1 (28) is fixedly connected to the base (7) and the two bottom plates (26), and a top plate 2 is fixedly connected between the top plate 1 (28) and the bottom plate (26).

5. The method for controlling surrounding rock in full-height strip paste filling mining of thick coal seams according to claim 4, characterized in that: Two guide shafts (29) are fixedly connected in the sliding groove, and the slider (13) is slidably connected to the two guide shafts (29).

6. The method for controlling surrounding rock in thick coal seam full-height strip paste filling mining according to claim 5, characterized in that: Two stabilizing rods (30) are fixedly connected to the clamping plate (19), two stabilizing holes are provided on the support plate (17), the stabilizing rods (30) are slidably connected in the stabilizing holes, and a stabilizing frame (31) is fixedly connected to the slider (13) and the two support plates (17).

7. The method for controlling surrounding rock in thick coal seam full-height strip paste filling mining according to claim 6, characterized in that: An anti-slip pad (32) is fixedly connected to the clamping plate (19).

8. A method for controlling surrounding rock in thick coal seam full-height strip paste filling mining, characterized in that: A method for controlling surrounding rock by one-time mining of full-height strip paste filling in thick coal seams according to any one of claims 1 to 7 is used, comprising the following steps: S1, the electric cylinder (18) drives the clamping plate (19) to clamp the filling pipe (16), the motor (14) drives the slider (13) to move through the threaded shaft (15), and the slider (13) drives the clamping plate (19), the filling pipe (16), etc. to move, so that the position of the filling pipe (16) can be moved. The inside of the goaf (3) can be filled first, and the filling pipe (16) can be slowly moved for filling, which can improve the filling effect and improve safety.

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