Mining area stope filling auxiliary device

Abstract

The utility model discloses an auxiliary filling device for a mining area stope. The auxiliary filling device comprises a plate wall and a supporting body, wherein the plate wall is used for blocking an outer opening of the stope. A wallboard is fixedly installed on the inner side of the board wall frame, and wallboard geotechnical cloth is fixed to the inner side of the wallboard. The supporting body comprises a waste rock pile dam located on the outer side of an outer opening of the stope and a backfill waste rock pile located in the stope. And a reinforcing filling body is arranged between the barren rock pile dam and the backfilled barren rock pile. The root of the board wall frame is located in the reinforcing filling body, the wall board is located above the reinforcing filling body, and the lower edge of the wall board is connected with the upper edge of the reinforcing filling body. The waste rocks are adopted for damming, the lower half part wall body of the filling retaining wall is constructed in cooperation with the underground filling materials, the whole filling retaining wall is supported and reinforced, the waste rocks and the underground filling materials are obtained locally, the retaining wall materials are saved, the material transportation cost is reduced, and the bearing strength is improved.

Description

Technical Field

[0001] The utility model relates to a mining area stope filling auxiliary device, which is used as a stope filling retaining wall in an underground metal mine. Background Art

[0002] As an existing technology, underground mine filling retaining walls are generally made of logs, wooden boards, steel mesh, geotextiles, etc. On the one hand, a large amount of wood and metal materials are consumed. On the other hand, as the mining depth of the mine gradually increases, the material transportation cost increases significantly. For example, the Qujia Mining Area of ​​Xincheng Gold Mine uses the Xincheng-730m filling connecting tunnel to the Qujia-920m segmented tunnel filling borehole pipeline for filling. The Qujia Mining Area is located at the end of the production system, with a deep mining depth and a long distance from the Xincheng Mining Area, which is a material distribution point. The transportation route of the materials used for the filling retaining wall is long and the lowering distance is large. As the production intensity of the Qujia Mining Area increases, the filling of the mine is seriously delayed, making it difficult to meet production needs.

[0003] The Chinese utility model patent with publication number CN208380627U discloses "a permeable reactive filling retaining wall for in-situ treatment of tailings water in underground mines". Its retaining wall skeleton is composed of anchor rods embedded in the surrounding rock and two layers of steel mesh welded together. A metal mesh is tied to the inner steel mesh, and a water filter material is set between the metal mesh and the steel mesh to cover the entire tunnel section. It can be seen that the filling retaining wall as a whole requires a large number of components and materials, which need to be transported from the distribution point to the vicinity of the underground mining site, and the material consumption and transportation cost are relatively high.

[0004] On the other hand, existing backfill retaining walls (sluice slab walls) generally have unstable strength problems. For example, when the slab wall is too large and too long, it is easy to collapse and shift. For example, in the field practice, the maximum span of the slab wall supported by the Qujia mining area reached 10m. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a mining area stope filling auxiliary device, which utilizes waste rock and underground filling materials to construct a filling retaining wall, so as to achieve the purpose of using local materials, reducing costs, and further improving the stability of the retaining wall.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A mining area stope filling auxiliary device comprises a plate wall for blocking the stope outer opening, the plate wall comprises a plurality of vertical columns arranged in the longitudinal direction, and also comprises a cross brace, the cross brace is fixedly mounted on the plurality of vertical columns to form a plate wall frame, a wall panel is fixedly mounted on the inner side of the plate wall frame, a wall panel geotextile is fixed on the inner side of the wall panel, the filling auxiliary device also comprises a support body for blocking the stope outer opening, the support body comprises a waste rock dam located outside the stope outer opening and a backfill waste rock pile located inside the stope; a reinforced filling body is provided between the waste rock dam and the backfill waste rock pile; the root of the plate wall frame is located in the reinforced filling body; the wall panel is located above the reinforced filling body, and the lower edge of the wall panel is connected to the upper edge of the reinforced filling body.

[0008] Preferably, an outer geotextile is provided between the waste rock dam and the reinforced filling body.

[0009] Preferably, the height ratio between the reinforcing filling body and the wall panel is 1:(1-2).

[0010] The beneficial effects of the utility model are as follows:

[0011] The utility model uses waste rock to build a dam, and cooperates with underground filling materials to construct the lower half of the wall of the filling retaining wall, and supports and reinforces the filling retaining wall as a whole. The waste rock and underground filling materials are locally sourced, which not only saves wood and metal materials as the main materials of the retaining wall, but also reduces the material transportation cost. The waste rock dam is added to the bottom of the retaining wall, and combined with the filling body, it forms a compressive form similar to a reservoir dam, and the pressure bearing strength is greatly increased, which solves the problem of unstable filling strength and easy collapse of the board wall when the board wall is too large and too long.

[0012] Compared with ordinary drainage board walls, the utility model uses waste rocks and filling bodies to replace one-third to one-half of the wooden boards in the lower part, and only needs to use wooden boards and geotextiles to seal the upper part. Each board wall can save about 1.5m³ of wood and about 12㎡ of geotextiles. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the transverse cross-sectional structure of an embodiment of the utility model.

[0014] Figure 2 It is a longitudinal sectional structural schematic diagram of an embodiment of the utility model.

[0015] Figure 3 It is a schematic diagram of the usage (filling process) of an embodiment of the utility model.

[0016] In the figure, 1, mining area, 2, backfill waste rock pile, 3, reinforcement filling body, 4, waste rock dam, 5, outer geotextile, 6, column, 7, wall panel, 8, wall panel geotextile, 9, cross brace, 10, board wall filling pipe, 11, drainage and exhaust pipe, 12, upper plate filling pipe. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the embodiments and drawings.

[0018] like Figure 1 and Figure 2 The embodiment of the utility model includes a board wall for blocking the outer opening of the mining field and a support body for blocking the outer opening of the mining field. The board wall includes a plurality of columns 6 parallel to each other and arranged longitudinally, and a cross brace 9 is fixedly installed on the plurality of columns 6 to form a board wall frame. A wall panel 7 is fixedly installed inside the board wall frame, and a wall panel geotextile 8 is fixed inside the wall panel 7. The columns 6, the cross brace 9 and the wall panel 7 are generally made of wood.

[0019] The support body includes a waste rock dam 4 located outside the outer opening of the mining area and a backfill waste rock pile 2 located inside the mining area 1. A reinforced filling body 3 is provided between the waste rock dam 4 and the backfill waste rock pile 2. The root of the board wall frame is located inside the reinforced filling body 3, the wall panel 7 is located above the reinforced filling body 3, and the lower edge of the wall panel 7 is connected to the upper edge of the reinforced filling body 3. That is, the upper half of the board wall is installed with the wall panel 7, and the lower half of the board wall frame is cast and fixed inside the reinforced filling body 3. Generally, the height ratio of the lower half and the upper half is 1: (1-2). Since the inner side surface of the waste rock dam 4 and the outer side surface of the backfill waste rock pile 2 naturally form an inclined surface, the inner and outer sides of the reinforced filling body 3 are both inclined surfaces, and the transverse section of the reinforced filling body 3 is a trapezoid with the upper base wider than the lower base.

[0020] Furthermore, an outer geotextile 5 is provided between the waste rock dam 4 and the reinforced filling body 3 .

[0021] The following examples illustrate the construction and use of the present invention.

[0022] like Figure 3 After the waste rock backfilling is completed inside the stope 1 and the backfill waste rock pile 2 is formed, a waste rock dam 4 is constructed outside the stope. The height of the waste rock dam 4 is about half of the height of the stope 1. The space between the waste rock dam 4 and the backfill waste rock pile 2 is cleared to the stope floor. Figure 1 Right side) Cover the outer opening with geotextile 5. Then seal the board wall at the outer opening of the stope.

[0023] The board wall is used to set up the board wall filling pipe 10, the drainage and exhaust pipe 11 and the upper wall filling pipe 12, and the board wall filling pipe 10 is used to inject grout between the waste rock dam 4 and the backfill waste rock pile 2 to form a reinforced filling body 3 with a height substantially equal to that of the waste rock dam 4, so as to achieve the purpose of reinforcing and stabilizing the board wall. The upper wall is filled to the top, and in this process, the inner side of the board wall is filled to the top first by means of the board wall filling pipe 10 to stabilize the board wall, and then the upper wall filling pipe 12 is used to fill the upper wall empty area to the top.

Claims

1. A mining area stope filling auxiliary device, comprising a plate wall for blocking the stope outer opening, the plate wall comprising a plurality of vertical columns (6) arranged longitudinally, and also comprising a cross brace (9), the cross brace (9) being fixedly mounted on the plurality of vertical columns (6) to form a plate wall frame, a wall panel (7) being fixedly mounted on the inner side of the plate wall frame, and a wall panel geotextile (8) being fixed on the inner side of the wall panel (7), characterized in that: The filling auxiliary device also includes a support body for sealing the outer opening of the mining area, the support body including a waste rock dam (4) located outside the outer opening of the mining area and a backfill waste rock pile (2) located inside the mining area (1); a reinforced filling body (3) is provided between the waste rock dam (4) and the backfill waste rock pile (2); the root of the panel wall frame is located inside the reinforced filling body (3); the wall panel (7) is located above the reinforced filling body (3), and the lower edge of the wall panel (7) is connected to the upper edge of the reinforced filling body (3).

2. The mining area stope filling auxiliary device according to claim 1, characterized in that: An outer geotextile (5) is provided between the waste rock dam (4) and the reinforced filling body (3).

3. The mining area stope filling auxiliary device according to claim 1 or 2, characterized in that: The height ratio between the reinforcing filling body (3) and the wallboard (7) is 1:(1-2).

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