Partition wall for mining and separation of goaf

Abstract

The partition wall is arranged in the middle of each stoping unit in the width direction of the goaf and comprises a plurality of spliced wallboards, each wallboard comprises a solid pressure-resistant plate, a fixed net rack and a movable net rack, the fixed net rack is connected to the thickness side of the solid pressure-resistant plate, and the movable net rack is connected to the thickness side of the solid pressure-resistant plate. One side of the movable net rack in the height direction is rotatably connected with the fixed net rack; the fixed net rack is a double-layer steel bar net rack, and the inner-layer steel bar net is provided with connecting steel bars used for being connected with the solid pressure-resistant plate; the fixing net racks of the adjacent wallboards are assembled in an inserted mode, a horizontal sleeve is welded to the corresponding assembling side of the fixing net rack of one wallboard, and a horizontal inserting rod is welded to the corresponding assembling side of the fixing net rack of the other wallboard. Each goaf is divided into two independent parts including a replacement area and a receiving area by the partition wall, so that the receiving area of each goaf is reserved as a free space for blasting and ore breaking of a subsequent stoping unit, direct contact between blasting operation and a filling body can be cut off, damage of blasting impact to the filling body is reduced to the maximum extent, and the service life of the filling body is prolonged. And the situation that mining of the follow-up stoping unit is delayed by filling and consolidation is avoided, and the overall mining efficiency is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the field of mining, and relates to a partition wall for separating the full mining area of ​​a goaf. Background Art

[0002] The premise of ore mining is that there is enough space to accommodate the blasting ore pile. Before mining in each stope, slotting must be done to create space for subsequent mining. Slotting is a refined operation process. Whether it is slotting by blasting or slotting by reverse shaft, it involves multiple processes such as chamber excavation, drilling, equipment installation, rock drilling, and mining. It has many steps, takes a long time, and has great safety risks. The slotting process is slow, which delays the progress of the stope and reduces mining efficiency. In addition, the stability of the rock mass in the mine varies greatly. The rock mass conditions in some areas are broken, making slotting difficult. For this reason, a lot of manpower, material and financial resources have to be invested, resulting in high mining time and economic costs, and may even cause resource loss and waste.

[0003] Another key issue that affects mining efficiency is the restriction of filling on mining. In a stope with step-by-step mining, the goaf must be filled after the first step of mining is completed. The filling and consolidation process usually takes more than one month. The second step of mining in the stope can only be carried out after the filling body reaches the designed strength, which seriously hinders the improvement of mining efficiency. Especially when step-by-step filling is adopted, each step requires consolidation. It often takes several months for the entire goaf to be filled. The mining plan is forced to be adjusted, which greatly interferes with the production order of the mine. Utility Model Content

[0004] The utility model aims to provide a partition wall for goaf area which can improve mining efficiency.

[0005] The goaf separation wall provided by the utility model is arranged in the middle position of the goaf width direction of each mining unit, and comprises a plurality of spliced ​​wall panels, each wall panel comprises a solid pressure-resistant plate, a fixed grid and a movable grid, the fixed grid is connected to the thickness side of the solid pressure-resistant plate, and the height side of the movable grid is rotatably connected to the fixed grid; the fixed grid is a double-layer steel grid, and the inner steel mesh is provided with connecting steel bars for connecting the solid pressure-resistant plate; the fixed grids of adjacent wall panels are plug-in assembled, and the fixed grid of one wall panel corresponds to a horizontal sleeve welded on the assembly side, and the fixed grid of the other wall panel corresponds to a horizontal plug rod welded on the assembly side.

[0006] When the above-mentioned partition wall is implemented, the movable grid includes vertical connecting ribs, pressure plates and torsion springs. There are multiple vertical connecting ribs, and multiple pressure plates are fixed on the vertical connecting ribs in parallel and evenly distributed up and down. A circular hole penetrating the thickness of each pressure plate is provided at one end in the length direction, and a torsion spring is fixed at the corresponding circular hole. A groove for clamping the fixed grid is provided on the inner side in the width direction of the pressure plate.

[0007] When the partition wall is implemented, the movable grid is assembled with the vertical steel bars of the fixed grid through the circular holes and the torsion springs, and the lower ends of the torsion springs are fixed to the vertical steel bars. Under the action of the torsion springs, the movable grid and the fixed grid are in a vertically intersecting state.

[0008] When the partition wall is implemented, after the movable grid and the fixed grid are assembled, a pull rope is fixed on the vertical connecting rib away from the torsion spring, and the pull rope is passed around the thickness side of the solid pressure-resistant plate and fixed to the pull ring on the back thereof.

[0009] When the above partition wall is implemented, a support block is set on one side of the thickness of the solid pressure-resistant plate, and a blade is vertically set at a corresponding position on the other side. The pull rope passes through the surface of the support block, and the blade is used to cut the pull rope when the wall panel is assembled.

[0010] When the above partition wall is implemented, the top surface of the support block is a concave arc surface.

[0011] This partition wall is set in the middle position of the width direction of each mining unit, dividing each goaf into two independent parts: the replacement area and the receiving area. Each goaf reserves the receiving area as a free space for the blasting and falling ore of the subsequent mining unit. It can not only cut off the direct contact between the blasting operation and the filling body, minimize the damage to the filling body caused by the blasting impact, but also avoid the consolidation of the filling to delay the mining of the subsequent mining units, greatly improving the overall mining efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the initial assembly of partition wall panels in one embodiment of the utility model.

[0013] Figure 2 This is a schematic diagram of the transportation status of the partition wall panels in this embodiment.

[0014] Figure 3 It is an enlarged schematic top view of the pressing plate in this embodiment.

[0015] Figure 4 It is an enlarged schematic diagram of the splicing nodes of the partition wall panels in this embodiment.

[0016] Figure 5 for Figure 4 An enlarged schematic diagram of part B in FIG.

[0017] Figures 6 to 11 Schematic diagram of the construction process of this embodiment. DETAILED DESCRIPTION

[0018] The partition wall PJQ in this embodiment includes a plurality of wall panels QB, the specific number of which is determined by the size of the goaf. Figure 1-3 As shown, adjacent wall panels are spliced ​​left and right, and the splicing structure is as follows Figure 4-5 shown.

[0019] The wall panel comprises a solid pressure-resistant plate 1, a fixed grid 2 and a movable grid 3.

[0020] The solid pressure-resistant plate 1 is a light plate.

[0021] The fixed grid 2 has two layers of inner and outer steel mesh, which are formed by vertical steel bars and horizontal steel bars respectively, and the two layers of steel mesh are tied into a whole by horizontal connecting bars. The outer steel mesh is welded with fixed steel bars 4 for connecting the solid pressure-resistant plate 1.

[0022] The plane size and height size of the fixed grid 2 are the same as those of the solid pressure-resistant plate 1 .

[0023] The movable grid 3 includes vertical connecting ribs 31, pressure plates 32 and torsion springs 33. There are multiple vertical connecting ribs and multiple pressure plates. A circular hole is set at one end of each pressure plate, and a torsion spring is fixed at the circular hole. Each pressure plate passes through the vertical connecting ribs in turn and is fixed at a specified interval.

[0024] The plane size of the movable grid 3 is the same as that of the solid pressure-resistant plate 1, and the height is smaller than that of the solid pressure-resistant plate.

[0025] The movable grid 3 is assembled with the vertical steel bars of the inner steel mesh of the fixed grid 2 through the circular holes on its pressing plate 32 and the torsion springs 33 .

[0026] Therefore, during production, the movable grid 3 should be manufactured first. When the fixed grid 2 is manufactured, the vertical steel bars specified by the fixed grid are passed through the torsion spring 33 and the pressure plate 32, and then the vertical steel bars are tied and fixed with the horizontal steel bars. After the fixed grid 2 is manufactured, the lower end of the torsion spring 33 is fixed to the vertical steel bars.

[0027] The movable grid 3 and the fixed grid 2 are assembled in a state where the movable grid 3 and the fixed grid 2 intersect vertically. Figure 1 shown.

[0028] When the fixed grid 2 is assembled with the solid pressure-resistant plate 1, it is connected and fixed with the solid pressure-resistant plate 1 through the fixed steel bars 4, or a rectangular steel plate is welded to the outer end of the fixed steel bars 4, and the rectangular steel plate is then connected and fixed with the solid pressure-resistant plate through fasteners.

[0029] In order to facilitate the rapid splicing of wall panels QB, adjacent wall panels are assembled by plug-in method, where the horizontal reinforcement of one wall panel corresponds to the welded sleeve 5 on the assembly side, and the horizontal reinforcement of the other wall panel corresponds to the welded plug rod 6 on the assembly side. Figure 4 shown.

[0030] In order to facilitate the transportation of the wall panels, after the wall panels are made, the movable grid 3 is tied:

[0031] A pull rope 7 (preferably a hemp rope) is fixed on the vertical connecting ribs outside the height direction of the movable grid 3. Figure 1 shown.

[0032] like Figure 4 , Figure 5 As shown, a support block 8 is provided on the thickness side of the solid pressure-resistant plate 1, and the top surface of the support block 8 is an inwardly concave arc surface, and a pull ring 9 is provided on the back of the solid plate 1. The pull rope 7 is passed through the support block 8 from the thickness side of the solid plate 1 and fixed on the pull ring 9, so that the movable grid 3 is engaged with the fixed grid 2. In order to avoid interference between the pressure plate 32 of the movable grid 3 and the vertical steel bars of the fixed grid 2, a steel bar clearance groove 321 is provided on the inner side of the pressure plate 32 when it is manufactured. The state of the movable grid 3 after being tied is as shown in FIG. Figure 2 shown.

[0033] Wall panels Figure 2 Shipping condition shown.

[0034] When the wall panels are installed, the pull rope 7 is cut off to allow the movable grid 3 to automatically spring back to a state where it intersects perpendicularly with the fixed grid 2 .

[0035] The purpose of setting the fixed grid 2 on the wall panel is to enhance the strength of the solid pressure-resistant plate 1 and reduce the squeezing effect of the filling body on the solid plate, and the purpose of setting the movable grid 3 is to enhance the overall stability of the wall panel and the filling body.

[0036] In order to make the movable grid 3 automatically pop open, a blade DP is set on the splicing side of the adjacent wall panels. When the adjacent wall panels are assembled, the blade is vertically located on the center plane of the concave arc surface of the support block 8 on the other wall panel. The wall panel with the support block is pushed toward the adjacent wall panel until the blade cuts the pull rope. The movable grid 3 loses the constraint of the pull rope 7 and automatically pops open under the reaction force of the torsion spring 33.

[0037] like Figures 6 to 11 As shown, the construction process of this embodiment is as follows:

[0038] The ore body is divided into several mining units. The first mining unit is connected to the vein tunnel 11 through the rock drilling tunnel 10, and the remaining mining units are connected to the vein tunnel 11 through the mine exit tunnel 12. Figure 6 shown.

[0039] To mine the first mining unit, a drilling tunnel is firstly drawn through the bottom of the unit, a groove is drawn at the end of the unit to form a groove area 13, a fan-shaped blast hole is constructed through the bottom drilling tunnel, and explosives are charged and blasted with the groove area as the free surface, and the ore is withdrawn and mined to form a goaf area.

[0040] After the first mining unit is mined, a partition wall PJQ is set in the middle of the goaf to separate the goaf into an independent replacement area 14 and a receiving area 15. Figure 7After the partition wall is spliced, the status of each wall panel is Figure 1 The state shown (the movable grid intersects the fixed grid vertically). Then fill the replacement area, and do not fill the receiving area, such as Figure 8 shown.

[0041] The fixed grid 2 is located on the filling surface of the wall panel, so during filling, both the movable grid and the fixed grid are buried in the filling slurry, and finally form an integral part with the filling body, which can well ensure the stability and tolerance of the partition wall.

[0042] The second mining unit uses the receiving area reserved by the first mining unit as the blasting free surface, and blasts the ore into the receiving area row by row. Figure 8 , Fig. 9 After mining, the goaf of the second mining unit is divided into an independent replacement area and a receiving area by a partition wall, and the receiving area of ​​the first mining unit and the replacement area of ​​the second mining unit are filled, and the receiving area 15 of the second mining unit is not filled, as shown in FIG. Fig.10 shown.

[0043] And so on, until all the mining units are mined and filled, such as Fig.11 shown.

[0044] During the entire mining and filling process, a partition wall is set in the middle of each mining unit. Except for the first mining unit and the last mining unit, the filling area of ​​other mining units is the goaf of one mining unit, and the filling does not affect the mining of subsequent units.

[0045] Figures 7 to 11 In the figure, the fixed grid and the movable grid of the partition wall panel are not shown, and the state of the wall panel after installation is Figure 1 In the state shown, the outer side of the solid pressure-resistant plate is the receiving area, which serves as the receiving space for the next mining unit.

[0046] This partition wall is set in the middle of the width direction of each mining unit, dividing each goaf into two independent parts: the replacement area and the receiving area, so that each goaf reserves the receiving area as a free space for the subsequent mining unit to blast and drop ore, which can not only cut off the direct contact between the blasting operation and the filling body, minimize the damage to the filling body caused by the blasting impact, but also avoid the delay of the mining of the subsequent mining units due to the consolidation of the filling, greatly improving the overall mining efficiency. At the same time, except for the first mining unit that needs to pull the groove, the subsequent mining units directly use the previously reserved receiving area as the groove area for blasting and dropping ore, without pulling the groove, which can effectively avoid the risk of roof collapse and rock slabs during the groove pulling process.

Claims

1. A partition wall for separating the goaf from the full mining area, characterized in that :The partition wall is set in the middle position of the width direction of the goaf of each mining unit, including several spliced ​​wall panels, each wall panel includes a solid pressure-resistant plate, a fixed grid and a movable grid, the fixed grid is connected to the thickness side of the solid pressure-resistant plate, and the height side of the movable grid is rotatably connected to the fixed grid; the fixed grid is a double-layer steel grid, and the inner steel mesh is provided with connecting steel bars for connecting the solid pressure-resistant plate; the fixed grids of adjacent wall panels are plug-in assembled, and the fixed grid of one wall panel corresponds to a horizontal sleeve welded on the assembly side, and the fixed grid of the other wall panel corresponds to a horizontal plug-in rod welded on the assembly side.

2. The partition wall for separating the goaf from the full mining area as claimed in claim 1, characterized in that: The movable grid includes vertical connecting ribs, pressure plates and torsion springs. There are multiple vertical connecting ribs. Multiple pressure plates are evenly distributed and fixed on the vertical connecting ribs in parallel. A circular hole penetrating the thickness of each pressure plate is provided at one end in the length direction. A torsion spring is fixed at the corresponding circular hole. A groove for clamping the fixed grid is provided on the inner side in the width direction of the pressure plate.

3. The partition wall for separating the goaf from the full mining area as claimed in claim 2, characterized in that: When the movable grid is assembled with the vertical steel bars of the fixed grid through the circular holes and the torsion springs, the lower ends of the torsion springs are fixed to the vertical steel bars. Under the action of the torsion springs, the movable grid and the fixed grid are in a vertically intersecting state.

4. The partition wall for separating the goaf from the full mining area as claimed in claim 3, characterized in that: After the movable grid is assembled with the fixed grid, a pull rope is fixed on the vertical connecting rib away from the torsion spring, and the pull rope is passed around the thickness side of the solid pressure-resistant plate and then fixed on the pull ring on the back side thereof.

5. The partition wall for separating the goaf from the full mining area as claimed in claim 4, characterized in that: A support block is arranged on one side of the thickness of the solid pressure-resistant plate, and a blade is vertically arranged at a corresponding position on the other side. The pull rope passes through the surface of the support block, and the blade is used to cut the pull rope when the wall panel is assembled.

6. The partition wall for separating the goaf from the full mining area as claimed in claim 5, characterized in that: The top surface of the support block is a concave arc surface.

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