Large-mining-height flexible die filling mining support and filling method thereof

Abstract

The large-mining-height flexible die filling mining support comprises a shield type support, a lower base of the shield type support is a front base, and a beam at the top of the shield type support is a front top beam; a front telescopic beam is hinged to the front end of the front top beam, a side protection plate is hinged to the front end of the front telescopic beam, a rear top beam is hinged to the rear end of the front top beam, and a rear telescopic beam is hinged to the rear end of the rear top beam. A rear base is hinged to the rear portion of the front base, and a hydraulic supporting column is arranged between the rear top beam and the rear base. A die clamping baffle and a rotating baffle are arranged at the rear end of the rear base, a telescopic box body A is arranged above the die clamping baffle, a die clamping mechanism is arranged at the top end of the telescopic box body A, a first oil cylinder and an operation platform are arranged on the side edge of the telescopic box body A, and a second oil cylinder is arranged in the operation platform and hinged to the rotating baffle. When the method is used for filling, a filling body formed in a goaf is good in integrity and does not need to be disassembled, filling operation is safe and reliable, the construction speed is high, and the requirement for safe and efficient production of mining is met.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine filling mining, and in particular relates to a flexible mold filling mining support with a large mining height, and also relates to a filling method of the flexible mold filling mining support with a large mining height. Background Art

[0002] my country has a huge amount of coal under "three places" (under buildings, under roads and railways, and under water bodies), about 14 billion tons, of which the proportion of coal under buildings is the highest, accounting for more than 60% of the total amount of coal. In the production process of coal mines, the coal pillars are generally retained for the recovery of the "three places" coal, resulting in a large backlog of coal resources, especially for thick coal seams. In addition, the retention of coal pillars also causes the mine to be unable to be mined reasonably, affecting the production layout and overall planning of the mine, and seriously restricting the development of the mine. Coal gangue is a solid waste generated during coal mining, washing and processing. The stacking of coal gangue not only occupies a large amount of land and pollutes the environment, but also does not meet the policy requirements of green mining in mines. In order to ease the tension in the connection between mining and excavation in mines, extend the service life of mines, solve the survival problems of employees, maintain social stability, and take into account the encouragement and support of the state and governments at all levels for green mining and gangue return technologies in mines, it is urgent to carry out gangue and other solid waste filling mining for the mining of "three places".

[0003] Flexible formwork filling mining aims to recover the "three-down" compressed coal while ensuring the safe use of surface buildings (structures), so as to achieve the purpose of mining the "three-down" compressed coal, reduce the emission and emission costs of solid waste gangue, etc., and realize the coordinated development of mining resources and environment.

[0004] Flexible mold filling mining generally adopts a one-time full-height filling mining method. For thick coal seams, the coal seams are thick and the mining height is large. In order to achieve large-scale, fast and efficient filling mining in the goaf, the large mining height flexible mold filling mining support should have the following characteristics: during the filling and mining process, when the top and bottom molds are connected, it is necessary to ensure the convenience of operation for the operators; reduce the impact of the slurry side pressure on the support to ensure the stability of the support; ensure that the docking of the filling pipeline is not affected by the mining height, easy to operate, and does not affect the recovery speed of the working face. Summary of the invention

[0005] The first purpose of the present invention is to provide a large mining height flexible mold filling mining support, which is convenient for workers to work during thick coal seam filling mining, effectively protects the safety of workers, ensures that the lateral pressure of the flexible mold filling slurry before initial setting does not affect the stability of the support, and at the same time ensures that the large mining height filling mining pipeline is easy to connect without affecting the recovery speed.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a large-scale high-precision flexible mold filling mining support, including a shield-type support, the lower base of the shield-type support is the front base, and the beam on the top of the shield-type support is the front top beam; a front telescopic beam is arranged at the front end of the front top beam, and a guard plate is hinged on the front telescopic beam; the rear end of the front top beam is hinged with a rear top beam, and the rear end of the rear top beam is hinged with a rear telescopic beam; the rear part of the front base is hinged with a rear base, and a hydraulic support is arranged between the rear top beam and the rear base; the rear end of the rear base is provided with a clamping baffle and a rotating baffle A retractable box A is arranged above the clamping baffle, and a clamping mechanism is arranged on the top of the retractable box A; a first oil cylinder and an operating platform are arranged on the side of the retractable box A, and a second oil cylinder is arranged on the operating platform, and the second oil cylinder is hinged to the rotating baffle. A grouting pipe is arranged on the top of the retractable box A, and the lower end of the rotating baffle is hingedly connected to the retractable box C, and the rotating baffle and the retractable box C are connected through a third oil cylinder, a retractable box B is arranged on the upper end of the rotating baffle, and a fourth oil cylinder is arranged on the retractable box B near the clamping mechanism.

[0007] As a preferred technical solution of the present invention, a guardrail is provided at the edge of the operating platform.

[0008] As a preferred technical solution of the present invention, two hydraulic columns are respectively arranged between the rear top beam and the rear base, and between the front top beam and the front base, and the two hydraulic supports located on the same side of the front top beam and the rear top beam are arranged in an inverted "eight" shape.

[0009] As a preferred technical solution of the present invention, a fifth oil cylinder is arranged between the shielding beam of the shielding support and the front top beam.

[0010] As a preferred technical solution of the present invention, a sixth oil cylinder is arranged below the rear top beam, the bottom of the cylinder barrel of the top beam telescopic oil cylinder is connected to the rear top beam, and the piston rod end of the sixth oil cylinder is connected to the grouting pipe.

[0011] As a preferred technical solution of the present invention, after the rotating baffle is hinged to the telescopic box C, the telescopic range of the telescopic box C is not greater than 1.6m; and the rotation angle range of the rotating baffle is not greater than 20°.

[0012] The second purpose of the present invention is to provide a filling method for a flexible mold filling mining support with a large mining height, which is convenient for workers to work during thick coal seam filling mining, effectively protects the safety of workers, ensures that the lateral pressure of the flexible mold filling slurry before initial setting does not affect the stability of the support, and at the same time ensures that the large mining height filling mining pipeline is easy to connect without affecting the recovery speed.

[0013] In order to achieve the above object, the technical solution adopted by the present invention is: a flexible mold filling method based on a large mining height flexible mold filling mining support, which specifically includes the following steps: Step 1: As the working face is pushed and mined, the first layer of flexible template is used as the top template of the flexible template isolator, and the second layer of flexible template is used as the bottom template of the flexible template isolator; the top template is installed on the lower edge of the top beam behind the filling and mining support, and the bottom template is laid on the bottom plate of the goaf; a pouring port for installing a grouting pipe is provided on the top template; Step 2, the top mold and the bottom mold are extended and sewn with a portable sewing machine; the top mold and the bottom mold pass through the rotating baffle of the filling and mining support and the clamping mechanism, and are fixed by the clamping mechanism; at the same time, the top mold and the top mold at the edge of the working face are sewn to form a disposable closed flexible mold isolation body that is equal to the cross-sectional periphery of the space to be poured; the flexible mold isolation body is a closed body, the length and width of which are the same as the length and width of the space to be poured, and the height is determined according to the coal seam recovery height of the coal mining working face; the top mold and the bottom mold are extended and clamped by the operator on the operating platform; Step 3, during filling, as the coal mining face advances, the flexible mold filling mining support moves forward, and the flexible mold isolation body continues to stretch and lay backward; Step 4: After the coal mining face is pushed and mined with a step distance of 1m-6m, the clamping mechanism of the mining support is fixed with a flexible mold to form a closed space to be poured in the goaf behind the support; Step 5, using the sixth oil cylinder to push the grouting pipe to the pouring port, insert it into the flexible mold isolation body, tie and connect the grouting pipe to the pouring port, and connect the slurry delivery pipe to the grouting pipe; the slurry delivery pipe is placed on the operating platform; Step 6: After the flexible mold isolation body is sealed, the prepared slurry filling material is injected into the flexible mold isolation body through the slurry delivery pipe and the grouting pipe to form a filling body supporting the roof in the goaf; Step 7: After the filling of the flexible mold separator is completed, the rotating baffle is left in place, and the second oil cylinder is opened and extended. The thrust of the second oil cylinder is used to push the rotating baffle backward to form a certain inclination angle. The rotating baffle squeezes the filled flexible mold separator, and the filling body is squeezed, dehydrated, and reinforced again to improve the strength and self-supporting ability of the filling body. Step 8: After the filling body solidifies, the clamping mechanism is lowered, and the coal mining working face is normally pulled to mine coal without retracting the rotating baffle; as the coal mining working face is pushed to mine, the rotating baffle is retracted when the rotating baffle reaches the maximum extension; Step 9, repeat the above steps 1 to 8 until the filling fills the goaf of the entire working face.

[0014] As a preferred technical solution of the present invention, the filling material uses water as a transport carrier, including high-water material, loess, a mixed slurry of sand and water, a mixed slurry of coal gangue and water, gangue concrete, foam concrete, and a filling material with high fluidity.

[0015] The beneficial effects of the present invention are as follows: (1) The large mining height flexible mold filling and mining support provided by the present invention is suitable for large mining height working faces. An operating platform is provided in the filling operation room, and the operating personnel work on the operating platform, which reduces the risk of falling when the operating personnel go up and down, and ensures the safety of the operation; (2) The present invention uses the horizontal oil cylinder of the operating platform and the horizontal oil cylinder of the rear base to push the rotating baffle, and forms a certain slope in the direction of the goaf before the initial solidification of the filling body, which is beneficial to the stability of the filling body and reduces the influence of the side pressure on the support during slurry filling. At the same time, the rotating baffle can be left at the rear, and the filling body can be recovered after solidification, and the filling does not affect the recovery of the working face. (3) The connection of the filling pipeline adopts the oil cylinder to push and automatically insert into the filling port, which has a fast connection speed and reduces the labor intensity of the workers. At the same time, the pushing of the oil cylinder reduces the influence of the power of the pump on the filling pipe during filling, and ensures the filling speed. The present invention also provides a large mining height flexible mold filling method: utilizing a large mining height filling and mining support to lay molds, fix molds, and clamp molds to form a disposable flexible mold isolation body that is consistent with the cross-sectional size of the filling space in the goaf, and the filling body has good integrity. At the same time, the filling body does not need to be demolded. This filling operation is safe and reliable, and the construction speed is fast. It meets the requirements of safe and efficient production in mining, and can be widely used in the mining of coal mines and non-coal mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a high-mining-height flexible mold filling mining support of the present invention; Figure 2 It is a schematic diagram of the mutual position relationship between a large mining height flexible mold filling mining support and a goaf area of ​​the present invention; Figure 3 A schematic diagram of the mutual position relationship between a flexible mold filling mining support and a comprehensive mechanized coal mining working face and a goaf area of ​​the present invention; Figure 4 It is a schematic diagram of the relative position relationship between the filling mining support and the goaf when the working face pushes and mines two steps in a large mining height filling mining method of the present invention.

[0017] Figure 5 It is a schematic diagram of the relative position relationship between a filling mining support and a goaf when a rotating baffle is recovered to form a filling space in a large mining height filling mining method of the present invention.

[0018] Figure 6 It is a schematic diagram of the mutual position relationship between grouting filling, filling mining support and goaf area in a large mining height filling mining method of the present invention.

[0019] In the figure: 1. front top beam, 2. front base, 3. shield support, 4. front telescopic beam, 5. guard plate, 6. hydraulic support, 7. fifth cylinder, 8. rear top beam, 9. rear base, 10. rear telescopic beam, 11. clamping baffle, 12. telescopic box A, 13. first cylinder, 14. rotating baffle, 15. telescopic box B, 16. fourth cylinder, 17. telescopic box C, 18. third cylinder, 19. operating platform, 20. guardrail, 21. second cylinder, 22. sixth cylinder; 23. clamping mechanism, 24. grouting pipe, 25. operating room, 26. slurry conveying pipe, 27. top mold, 28. bottom mold, 29. filling body, 30. goaf, 31. coal mining working face, 32. filling material, 33. flexible mold isolation body. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Example 1 like Figure 1 As shown, the present invention is a high-mining flexible mold filling mining support, including a shielding support 3, the lower base of the shielding support 3 is the front base 2, and the beam on the top of the shielding support 3 is the front top beam 1; a front telescopic beam 4 is arranged at the front end of the front top beam 1, and a guard plate 5 is hinged on the front telescopic beam 4; a fifth oil cylinder 7 is arranged on the shielding beam of the shielding support 3, the bottom of the cylinder barrel of the fifth oil cylinder 7 is hinged to the shielding beam, and the end of the piston rod of the fifth oil cylinder 7 is hinged to the front top beam 1.

[0022] A rear top beam 8 is hinged at the rear of the front top beam 1, and a rear base 9 is hinged at the rear of the front base 2; the rear top beam 8 and the rear base 9 are arranged in parallel; a rear telescopic beam 10 is arranged at the rear of the rear top beam 8; the rear top beam 8 and the rear base 9 are connected by a hydraulic support 6, the bottom of the cylinder of the hydraulic support 6 is connected to the rear base 9, and the piston rod end of the hydraulic support 6 is connected to the rear top beam 8.

[0023] A clamping baffle 11 is vertically arranged at the rear end of the rear base 9, a retractable box A 12 is arranged above the clamping baffle 11, and a clamping mechanism 23 is arranged at the top of the retractable box A 12; the clamping baffle 11 lifts the clamping mechanism 23 through the retractable box A 12; a first oil cylinder 13 is arranged near the operating room 25 of the retractable box A 12, and the clamping mechanism 23 adopts the existing structure; an operating platform 19 is arranged at the top of the telescopic position of the retractable box A 12 toward the operating room 25; a second oil cylinder 21 is arranged in the operating platform 19, the bottom of the cylinder barrel of the second oil cylinder 21 is connected to the operating platform 19, the piston rod passes through the retractable box A 12, and the end of the piston rod is hinged to the top of the first telescopic position of the rotating baffle 14; a guardrail 20 is arranged on the edge of the operating platform 19; a grouting pipe 24 is arranged below the clamping mechanism 23 at the top of the retractable box A 12.

[0024] A rotating baffle 14 is also provided at the rear end of the rear base 9. The lower end of the rotating baffle 14 is connected to the rear base 9 through a retractable box C 17. The rotating baffle 14 and the retractable box C 17 are hingedly connected, and the rotating baffle 14 and the retractable box C 17 are also connected through a third oil cylinder 18. A retractable box B 15 is provided at the upper end of the rotating baffle 7. A fourth oil cylinder 16 is provided on the side of the retractable box B 15 close to the clamping mechanism 11.

[0025] Combination Figures 2 to 6 The specific implementation steps of the process of using a large mining height flexible mold filling mining support of the present invention to carry out flexible mold filling mining are as follows: Step 1, as the working face is mined, the first layer of flexible formwork is used as the top formwork 27 of the flexible formwork isolation body 33, and the second layer of flexible formwork is used as the bottom formwork 28 of the flexible formwork isolation body 33; the top formwork 27 is installed on the lower edge of the top beam 8 behind the filling and mining support, and the bottom formwork 27 is laid on the bottom plate of the goaf 30; a filling port for installing the grouting pipe 24 is set on the top formwork 27.

[0026] Step 2, the top mold 27 and the bottom mold 28 are extended and sewn with a portable sewing machine; the top mold 27 and the bottom mold 28 pass through the rotating baffle 14 of the filling and mining support and the clamping mechanism 23, and are fixed by the clamping mechanism 23; at the same time, the top mold 27 and the top mold 28 at the edge of the working face end are sewn to form a disposable closed flexible mold isolation body 33 equal to the cross-sectional periphery of the space to be poured; the flexible mold isolation body 33 is a closed body, the length and width of which are the same as the length and width of the space to be poured, and the height is determined according to the coal seam recovery height of the coal mining working face 31; the top mold 27 and the bottom mold 28 are extended and clamped by the operator on the operating platform 19.

[0027] Step 3, during filling, as the coal mining face 31 pushes the flexible mold filling mining support forward, the flexible mold insulation body 33 continues to be stretched and laid backward.

[0028] Step 4: After the coal mining face 31 is pushed and mined with a step distance of 1-6m, the clamping mechanism 23 of the mining support is filled with a flexible mold to fix the top mold 27 and the bottom mold 28, and a closed space to be poured is formed in the goaf 30 behind the support.

[0029] Step 5, use the sixth oil cylinder 22 to push the grouting pipe 24 to the pouring port, insert it into the flexible mold isolation body 33, tie and connect the grouting pipe 24 to the pouring port, and connect the slurry delivery pipe 26 to the grouting pipe 24; the slurry delivery pipe 26 is placed on the operating platform 19.

[0030] Step 6: After the flexible mold insulation body 33 is sealed, the prepared filling material 32 is injected into the flexible mold insulation body 33 through the slurry delivery pipe 26 and the grouting pipe 24 to form a filling body 29 supporting the roof in the goaf 30.

[0031] Step 7, after the filling of the flexible mold insulator 33 is completed, the rotating baffle 14 is left in place, and the second oil cylinder 21 is opened and extended. The thrust of the second oil cylinder 21 is used to push the rotating baffle 14 backward to form a certain angle. The rotating baffle 14 squeezes the filled flexible mold insulator 33, and the filling body 29 is squeezed, dehydrated, and reinforced again to improve the strength and self-supporting ability of the filling body 29.

[0032] Step 8, after the filling body 29 solidifies, the clamping mechanism 23 is lowered, and the coal mining working face 31 is normally pulled to mine coal, and the rotating baffle 14 is not retracted; as the coal mining working face 31 is pushed to mine, the rotating baffle 14 is retracted when the rotating baffle 14 reaches the maximum extendable amount.

[0033] Step 9, repeat the above steps 1 to 8 until the filling body 29 fills the goaf 30 of the entire working face.

[0034] Example 2 Different from Example 1, the filling material 32 uses water as a transport carrier and includes high-water material, loess, a mixed slurry of sand and water, a mixed slurry of coal gangue and water, gangue concrete, and foam concrete, and is a filling material with high fluidity.

[0035] After the filling material 32 is mixed and stirred according to the designed mix ratio, it is transported to the disposable closed flexible mold isolation body 33 in the goaf through a filling pump or its own weight through a pipeline for filling.

[0036] Example 3 Different from Example 1, two hydraulic columns 6 are arranged between the rear top beam 8 and the rear base 9, and the two hydraulic columns 6 of the shielding support 3 are located on the same side of the front top beam and the rear top beam and are arranged in an inverted "eight" shape; the gap between the rear sides of the two hydraulic columns 6 connected between the rear top beam 8 and the rear base 9 and the clamping baffle 11 is an operation room 25, and the lateral distance f of the operation room 25 has a value of 0.55-0.9m; the length of the rear telescopic beam 10 is 0.6m-1.0m; the sixth oil cylinder 22 is arranged below the rear top beam 8, the bottom of the cylinder barrel of the sixth oil cylinder 22 is connected to the rear top beam 8, and the end of the piston rod of the sixth oil cylinder 22 is connected to the grouting pipe 24; the rotating baffle 14 is hingedly connected to the telescopic box C17, and the telescopic range of the telescopic box C17 is 0m~1.6m; the rotation angle range of the rotating baffle is 0°-20°.

Claims

1. Large mining height flexible mold filling mining support, It is characterized in that The utility model comprises a shielding bracket, wherein the lower base of the shielding bracket is the front base, and the beam on the top of the shielding bracket is the front top beam; the front end of the front top beam is hinged with a front telescopic beam, the front end of the front telescopic beam is hinged with a guard plate, the rear end of the front top beam is hinged with a rear top beam, and the rear end of the rear top beam is hinged with a rear telescopic beam; the rear part of the front base is hinged with a rear base, and a hydraulic support is arranged between the rear top beam and the rear base; the rear end of the rear base is arranged with a clamping baffle and a rotating baffle, and a retractable box is arranged above the clamping baffle The telescopic box body A is provided with a clamping mechanism at the top, a first oil cylinder and an operating platform are provided on the side of the telescopic box body A, a second oil cylinder is provided in the operating platform, the second oil cylinder is hinged to the rotating baffle, a grouting pipe is provided at the top of the telescopic box body A, the lower end of the rotating baffle is hinged to the telescopic box body C, and the rotating baffle and the telescopic box body C are connected by a third oil cylinder, a telescopic box body B is provided at the upper end of the rotating baffle, and a fourth oil cylinder is provided on the telescopic box body B near the clamping mechanism side.

2. The high-mining flexible mold filling mining support according to claim 1, It is characterized in that A guardrail is arranged at the edge of the operating platform.

3. The high-mining flexible mold filling mining support according to claim 1, It is characterized in that Two hydraulic columns are respectively arranged between the rear top beam and the rear base, and between the front top beam and the front base, and two hydraulic supports located on the same side of the front top beam and the rear top beam are arranged in an inverted "eight" shape.

4. The high-mining flexible mold filling mining support according to claim 1, It is characterized in that A fifth oil cylinder is arranged between the shielding beam of the shielding support and the front top beam.

5. The high-mining flexible mold filling mining support according to claim 1, Features: A sixth oil cylinder is arranged below the rear top beam, the bottom of the cylinder barrel of the top beam telescopic oil cylinder is connected to the rear top beam, and the end of the piston rod of the sixth oil cylinder is connected to the grouting pipe.

6. The high-mining flexible mold filling mining support according to claim 1, Features: After the rotating baffle is hinged to the telescopic box C, the telescopic range of the telescopic box C is no more than 1.6m; The rotation angle range of the rotating baffle is not greater than 20°.

7. A flexible mold filling method for a large mining height flexible mold filling mining support based on claims 1 to 6, Features: The specific steps include: Step 1, as the working face is pushed and mined, the first layer of flexible template is used as the top template of the flexible template isolator, and the second layer of flexible template is used as the bottom template of the flexible template isolator; the top template 3 is installed on the lower edge of the top beam behind the filling and mining support, and the bottom template is laid on the bottom plate of the goaf; a pouring port for installing a grouting pipe is set on the top template; Step 2, the top mold and the bottom mold are extended and sewn with a portable sewing machine; the top mold and the bottom mold pass through the rotating baffle of the filling and mining support and the clamping mechanism, and are fixed by the clamping mechanism; at the same time, the top mold and the top mold at the edge of the working face are sewn to form a disposable closed flexible mold isolation body that is equal to the cross-sectional periphery of the space to be poured; the flexible mold isolation body is a closed body, the length and width of which are the same as the length and width of the space to be poured, and the height is determined according to the coal seam recovery height of the coal mining working face; the top mold and the bottom mold are extended and clamped by the operator on the operating platform; Step 3, during filling, as the coal mining face advances, the flexible mold filling mining support moves forward, and the flexible mold isolation body continues to stretch and lay backward; Step 4: After the coal mining face is pushed and mined with a step distance of 1m-6m, the clamping mechanism of the mining support is fixed with a flexible mold to form a closed space to be poured in the goaf behind the support; Step 5, use the top beam telescopic cylinder to push the grouting pipe to the pouring port, insert it into the flexible mold isolation body, tie and connect the grouting pipe to the pouring port, and connect the slurry delivery pipe to the grouting pipe; place the slurry delivery pipe on the operating platform; Step 6: After the flexible mold isolation body is sealed, the prepared slurry filling material is injected into the flexible mold isolation body through the slurry delivery pipe and the grouting pipe to form a filling body supporting the roof in the goaf; Step 7, after the filling of the flexible mold separator is completed, the rotating baffle is left in place, and the horizontal cylinder of the operating platform is opened and extended. The thrust of the horizontal cylinder of the operating platform is used to push the rotating baffle backward to form a certain inclination angle. The rotating baffle squeezes the filled flexible mold separator, and the filling body is squeezed, dehydrated, and reinforced again to improve the strength and self-supporting ability of the filling body; Step 8: After the filling body solidifies, the clamping mechanism is lowered, and the coal mining working face is normally pulled to mine coal without retracting the rotating baffle; as the coal mining working face is pushed to mine, the rotating baffle is retracted when the rotating baffle reaches the maximum extension; Step 9, repeat the above steps 1 to 8 until the filling fills the goaf of the entire working face.

8. The flexible mold filling method based on the large mining height flexible mold filling mining support according to claim 7, Features: The filling material uses water as a transport carrier, including high-water materials, loess, a mixed slurry of sand and water, a mixed slurry of coal gangue and water, gangue concrete, foam concrete, and other filling materials with high fluidity.

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