Retaining wall structure capable of rapidly filtering water and filling

Abstract

The utility model discloses a rapid water filtering and filling retaining wall structure which comprises a first-stage retaining wall which is built on the edge of the outer side of a stope and is lower than the top side of the stope, the first-stage retaining wall is a waste rock retaining wall, and geotechnical cloth used for filtering and filling slurry is laid on the inner side wall of the waste rock retaining wall. The filling retaining wall structure further comprises a first filling body located in the stope, and the height of the outer side of the first filling body is lower than that of the waste rock retaining wall. The filling retaining wall structure further comprises a cement hollow block retaining wall erected between the outer side of the first filling body and the top side of the stope. Geotechnical cloth is fixedly laid on the inner side of the cement hollow block retaining wall. The utility model solves the problems that the filling and filtering efficiency is low, the water filtering time is long, and the strength and the stability of a filling body are influenced by filling material segregation.

Description

TECHNICAL FIELD

[0001] The utility model relates to mine filling technical field, concretely relates to a kind of filling retaining wall structure capable of quick water filtration. BACKGROUND

[0002] In order to effectively support mine goaf, and play good filter water effect, traditional filling retaining wall usually adopts the combination of wood framework, geotextile and shotcrete body to construct retaining wall structure. However, this method has some shortcomings. First, this retaining wall structure may cause filling material segregation and stratification, which affects the strength and stability of filling body, and the filter water time is long. Second, a large amount of wood and mortar is needed to build retaining wall, which leads to long transportation time and high cost. Moreover, shotcrete needs maintenance, and the construction period is long and the process is complicated. During the filling process, high-level indicating pipe is needed to monitor water flow state and judge filling effect. This process needs multiple cycles and continuous water release, which leads to low filter water efficiency of filling body.

[0003] For example, according to the operation procedures of a certain gold mine of Shandong Gold, the construction of filling retaining wall composed of wood framework, geotextile and shotcrete body needs to go through the following steps: first, 2-3 columns are constructed, the roof is wedged with wedge, the bottom plate is excavated to hard rock or filling body and a wooden pad is added, and the depth of the excavated groove of the bottom plate is not less than 10 cm. The distance between wood columns should be not more than 1.5 m, and when the width of the board wall exceeds 4 m, the number of columns is increased to 3; when the height of the board wall exceeds 4 m, diagonal bracing is installed; the diameter of round wood for closure should be not less than 12 cm; wooden boards are fixed on the inner side of the columns, and the distance between wooden boards is about 15-20 cm; geotextile is laid on the outer side of the columns, and the wood framework is completely wrapped from the outside, and the geotextile is fixed on the wooden boards with iron nails. It is strictly prohibited to replace geotextile with dense wooden boards, and it is strictly prohibited to fix geotextile with dense wooden boards; the thickness of shotcrete is not less than 30 cm, and when the roof is broken, the shotcrete body extends outward by 1-2 m, and the peripheral shotcrete layer presents an arc shape. The thickness of shotcrete is not less than 10 cm. In special cases, the shotcrete range needs to be expanded, and the shotcrete amount needs to be increased. The shotcrete of the board wall is implemented by net shotcreting, and the steel wire mesh (Ø3mm-5mm, mesh hole 50mm*50mm is appropriate) covers two columns horizontally and is fixed with iron nails. Second, after 8h of shotcreting of the board wall, the quality of the shotcreting of the board wall is confirmed by the workers, and then the board wall is filled. Third, after the filling of the board wall is completed, the board wall is maintained for 8h, and then the upper disc of the stope is filled until the high-level indicating pipe sees muddy water. During the filling process of the upper disc of the stope, water is continuously released, and when the high-level indicating pipe sees muddy water, the indicating pipe is folded, and the surface is notified to stop. After 8h of maintenance of the high-level water release pipe, subsequent filling is carried out until the exhaust pipe sees water and stops. The subsequent filling is carried out every 8h until the exhaust pipe sees muddy water. After the exhaust pipe sees muddy water, the filling is maintained for 24h, and then supplementary filling is carried out again. The exhaust pipe sees water and stops, and after the stop is completed, the final state of the exhaust pipe (see mixed or see sand) is confirmed. When the final state is see sand, the indication is completed, and when the final state is see mixed, the filling needs to be maintained for 24h and then supplementary filling is carried out again. Utility Model Content

[0004] This utility model proposes a rapid water filtration filling retaining wall structure, the purpose of which is to solve the problems of low filling filtration efficiency, long water filtration time, and segregation of filling material affecting the strength and stability of the filling body.

[0005] The technical solution of this utility model is as follows:

[0006] A rapid water-filtration backfill retaining wall structure includes a first-level retaining wall constructed at the outer edge of a stope and lower than the top side of the stope. The first-level retaining wall is a waste rock retaining wall. The inner wall of the waste rock retaining wall is lined with geotextile for filtering the backfill slurry. The backfill retaining wall structure also includes a first backfill body located within the stope, the outer portion of which is lower than the waste rock retaining wall. The backfill retaining wall structure further includes a hollow cement block retaining wall erected between the outer portion of the first backfill body and the top side of the stope, the inner side of which is fixedly lined with geotextile.

[0007] As a further improvement of this utility model, the filling retaining wall structure also includes a first filling pipe, a second filling pipe, a water outlet pipe, and an exhaust pipe passing through the cement hollow block retaining wall.

[0008] Specifically, the inner ends of the second filling pipe, the water discharge pipe, and the vent pipe rest against the top side of the mining area, and the inner end of the first filling pipe is located between the upper side of the first filling body and the top side of the mining area.

[0009] Compared with the prior art, the present invention has the following advantages:

[0010] (1) This utility model uses waste rock from the mine to build the first-level retaining wall, which greatly reduces the overall cost by using local materials. At the same time, geotextile is installed on the inside of the waste rock retaining wall, and the two together can quickly filter water.

[0011] (2) This utility model uses cement hollow blocks to build a second-level retaining wall on the top surface of the first filling body. Since the cement hollow blocks have through holes, the filling water can be filtered out quickly. The first filling pipeline, the second filling pipeline, the water drain pipe and the exhaust pipe are set up through the second-level retaining wall to quickly complete the filling. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the filling retaining wall structure according to an embodiment of the present utility model;

[0013] Figure 2 for Figure 1 Section II, the piping is omitted in this figure.

[0014] Explanation of reference numerals in the attached figures:

[0015] 1, waste rock retaining wall; 2, cement hollow block retaining wall; 3, geotextile; 4, first filling pipeline; 5, second filling pipeline; 6, water drainage pipe; 7, exhaust pipe; 8, first filling body; 9, second filling body. DETAILED DESCRIPTION

[0016] The technical solutions and technical effects of the present application will be described in detail below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0017] As Figure 1 and Figure 2 An embodiment of the quick water filtration filling retaining wall structure comprises a first level retaining wall built on the outside edge of the stope and lower than the top side of the stope. Specifically, the stope height is 4m, the first level retaining wall is a waste rock retaining wall 1 about 3m high, and the waste rock retaining wall 1 is about 1m lower than the top side of the stope. The inside wall of the waste rock retaining wall 1 is paved with geotextile 3 for filtering filling material slurry. In order to ensure that the geotextile 3 has good bleeding property, the geotextile with a density of 2.5*5*200g / m is preferably used.

[0018] The embodiment further comprises a first filling body 8 located in the stope, which is high inside and low outside ( Figure 1 high right and low left as shown) and has an outer side height of about 2.5m, which is about 0.5m lower than the waste rock retaining wall 1.

[0019] The embodiment further comprises a second level retaining wall erected between the outer side part (left side part) of the first filling body 8 and the top side of the stope. Figure 1 Specifically, the second level retaining wall comprises a cement hollow block retaining wall 2, and the inside of the cement hollow block retaining wall 2 is fixedly paved with geotextile 3.

[0020] Further, the cement hollow block used for building the cement hollow block retaining wall 2 has a specification of 400mm*200mm*200mm.

[0021] The embodiment further comprises a first filling pipeline 4, a second filling pipeline 5, a water drainage pipe 6 and an exhaust pipe 7 passing through the cement hollow block retaining wall 2. The inner ends of the second filling pipeline 5, the water drainage pipe 6 and the exhaust pipe 7 are located close to the top side of the stope, and the inner end of the first filling pipeline 4 is located between the upper side of the first filling body 8 and the top side of the stope.

[0022] The following illustrates the construction method and filling method of the retaining wall structure of the present application:

[0023] 1. Use waste rock to pile up as a first level retaining wall at the edge of the working area, and lay a layer of geotextile 3 on the inner side wall of the waste rock retaining wall 11, embed 50 cm at the bottom of the geotextile 3, and extend 1-2 meters to both sides, and bond it on the rock with cement mortar, and use iron wire to bundle the pipe-penetrating part to avoid tearing and running of the mortar.

[0024] 2. After the first level retaining wall is built and the geotextile is laid, the first filling is carried out from the head of the stope, and after sedimentation, the filling water is filtered through the geotextile and quickly flows out from the gaps of the waste rock retaining wall 11, which helps to reduce the drainage time, accelerate the solidification, and prevent the filling material from being excessively diluted to reduce the segregation phenomenon. After the first filling body 8 is solidified to the required strength, the first filling body 8 is formed.

[0025] 3. Build a cement hollow block retaining wall 2 as a second level retaining wall on the outer side (close to the waste rock retaining wall 11) of the first filling body 8, and then fix the geotextile 3 inside the cement hollow block retaining wall 2. After the second level retaining wall is cured to the required strength, the first filling pipe 4, the second filling pipe 5, the drainage pipe 6 and the exhaust pipe 7 are erected through the cement hollow block retaining wall 2. Then continue to carry out the filling operation, and the filling material is discharged to the upper side of the first filling body 8 through the first filling pipe 4 and the second filling pipe 5, the air in the stope is discharged through the exhaust pipe 7, and the filling water is discharged through the drainage pipe 6. After the drainage pipe 6 sees the filling material slurry (which means that the area through which the water flows starts to have sediment, and the filling body has been preliminarily formed), stop filling, and wait for the sedimentation to end before continuing to fill. Repeat the above steps until the exhaust pipe 7 sees the filling material slurry (which means that the filling body has been basically completed, the water has been effectively discharged, and the filling body has sufficient strength and stability), forming the second filling body 9, and the filling is completed.

[0026] It should be noted that for those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. The scope of the present application is defined by the claims rather than the above description.

Claims

1. A rapid water filtration and filling retaining wall structure, comprising a first-level retaining wall constructed at the outer edge of the stope and lower than the top side of the stope, characterized in that: The first-level retaining wall is a waste rock retaining wall (1); the inner wall of the waste rock retaining wall (1) is covered with geotextile (3) for filtering the filling slurry; the filling retaining wall structure also includes a first filling body (8) located in the mining area, the height of the outer part of the first filling body (8) is lower than that of the waste rock retaining wall (1); the filling retaining wall structure also includes a cement hollow block retaining wall (2) erected between the outer part of the first filling body (8) and the top side of the mining area; the inner side of the cement hollow block retaining wall (2) is fixedly covered with geotextile (3).

2. The rapid water filtration and filling retaining wall structure as described in claim 1, characterized in that: The filling retaining wall structure also includes a first filling pipe (4), a second filling pipe (5), a water discharge pipe (6), and an exhaust pipe (7) passing through the cement hollow block retaining wall (2).

3. The rapid water filtration and filling retaining wall structure as described in claim 2, characterized in that: The inner ends of the second filling pipe (5), the water drain pipe (6) and the exhaust pipe (7) rest against the top side of the mining area; the inner end of the first filling pipe (4) is located between the upper side of the first filling body (8) and the top side of the mining area.

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