An upward filling method for large-area collapse cavity of non-ferrous metal underground mine

Abstract

The present application relates to a kind of upward filling method of non-ferrous metal underground mine large area collapse empty area, when the roof surrounding rock of mined-out area occurs large area collapse, and after a period of observation, the overall collapse area presents stable state, according to the actual situation of site, filter wall is laid in batches, filling pipe is laid above filter wall, and filling material is supplied in filling pipe;Wherein, the cemented filling of suitable sand ratio is used for filling material, and filling material forms filling body on the side of filter wall;According to actual collapse situation, filter wall is built in several times upward, and after the cementation of lower filling body, the next filter wall can be built to fill.The present application completes filling and roof by field filling pipeline, slurry and filter wall in layers and multiple times, achieves the purpose of filling in large area collapse empty area, the method of the present application is simple, widely applicable, material is simple, flexible and variable, and can effectively solve the practical problem of large area collapse of metal mine roof.

Description

Technical Field

[0001] The present invention relates to the field of filling engineering, in particular to an upward filling method for large-area collapsed areas in non-ferrous metal underground mines. Background Art

[0002] At present, most non-ferrous metal underground mines adopt the backfill mining method. However, the underground surrounding rock is complex and changeable. During the mining process, it is difficult to fill the roof after it collapses. The construction auxiliary project is a common filling method to fill the goaf after it collapses. This method is not only time-consuming, inefficient, but also expensive. Summary of the Invention

[0003] The purpose of the present invention is to solve the defects of the prior art and provide an upward filling method for large-scale collapsed areas in non-ferrous metal underground mines.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A method for upward filling of large-scale collapsed voids in non-ferrous metal underground mines. When a large-scale collapse of the surrounding rock of the goaf occurs and the collapsed area is observed to be stable as a whole over a period of time, a drainage retaining wall is laid in stages according to the actual situation on site. A filling pipe is laid above the drainage retaining wall and a filling material is supplied into the filling pipe. The filling material is a cemented filling material with an appropriate lime-sand ratio, and the filling material forms a filling body on one side of the drainage retaining wall.

[0006] According to the actual collapse situation, the water filter retaining wall is built upward several times. After the lower filling body is cemented, the water filter retaining wall can be built in the next step for filling.

[0007] Furthermore, the water filter retaining wall can filter clean water, block filling slurry, and cannot collapse.

[0008] Furthermore, the water filter retaining wall may be filled with sandbags.

[0009] Furthermore, the water filter retaining wall is built up to a height of 1.8-2 meters and a width of 1.5-2 meters according to actual conditions. The laying process of the water filter retaining wall is carried out in a staggered manner. At the same time, sacks or other permeable materials are laid inside the water filter retaining wall and fixed.

[0010] Furthermore, the filling material uses graded tailings or whole tailings and cement or cement powder as aggregate, with a ash-sand ratio of not less than 1:10 and a concentration of 60%-70%.

[0011] Furthermore, the filling material is filled in stages, and after the lower layer is filled and cemented, the upper layer can be filled;

[0012] The filling material can be filled in each layer or multiple times according to the actual situation of the collapsed area and the water filtration retaining wall.

[0013] Furthermore, the filling ratio of the filling tube is not greater than 5.0;

[0014] Among them, the filling pipe is required to be laid with combustion-supporting clinker pipeline and fixed above the water filter retaining wall with steel or other materials;

[0015] When filling the filling pipe for the last time, the feeding port of the filling pipe needs to be fixed at the highest point of the collapsed area to ensure that the filling is topped off.

[0016] Furthermore, a number of observation and exhaust holes are provided on the top plate of the collapsed area, and the observation and exhaust holes are used to judge the filling height and exhaust effect during the last filling.

[0017] The beneficial effects of the present invention are as follows: This application solves the problem of large-scale collapse of the roof of a non-ferrous metal underground mine by adopting a filling method for high-rise collapsed areas at the bottom elevation position. The filling and topping are completed in layers multiple times through on-site filling pipes, slurry, and water filtration retaining walls, thereby achieving the purpose of filling large-scale collapsed areas.

[0018] The invention has a simple method, wide applicability, simple materials, and flexibility. It can effectively solve the practical problem of large-scale collapse of the roof of a metal mine, improve safety, save manpower, material resources, and engineering costs, and has certain promotion value in solving the elevation gap at the bottom elevation of metal and non-metal mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of an upward filling method for a large-scale collapsed area in a non-ferrous metal underground mine according to the present invention;

[0020] Figure 2 The present invention is a schematic diagram of a water filter retaining wall for an upward filling method of a large-scale collapsed area in a non-ferrous metal underground mine.

[0021] Figure 3 This is a schematic diagram of the installation of a filling pipe for an upward filling method for a large-scale collapsed area in a non-ferrous metal underground mine according to the present invention;

[0022] Figure 4 The present invention is a schematic diagram of the installation of an exhaust observation hole for an upward filling method of a large-scale collapsed area in a non-ferrous metal underground mine. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0024] Reference Figures 1-4 A method for upward filling of large-scale collapsed voids in non-ferrous metal underground mines. When a large-scale collapse of the surrounding rock of the roof of the goaf 1 occurs, and after a period of observation, the collapsed area 2 is generally stable, a drainage retaining wall 3 is laid in stages according to the actual situation on site. A filling pipe 4 is laid above the drainage retaining wall 3, and a filling material is supplied into the filling pipe 4. The filling material is a cemented filling material with an appropriate lime-sand ratio, and the filling material forms a filling body 7 on one side of the drainage retaining wall 3.

[0025] According to the actual collapse situation, the water filter retaining wall 3 is built upward several times. After the lower filling body 7 is cemented, the water filter retaining wall 3 can be built downward for filling.

[0026] Among them, the water filter retaining wall 3 can filter clean water, block the filling slurry, and cannot collapse. The water filter retaining wall 3 can use filling sandbags.

[0027] The water filter retaining wall 3 is built up with a height of 1.8-2 meters and a width of 1.5-2 meters according to actual conditions. The laying process of the water filter retaining wall 3 is carried out in a staggered manner. At the same time, sacks or other permeable materials are laid inside the water filter retaining wall 3 and fixed. The filling material uses graded tailings or whole tailings and cement or glue powder as aggregate, with a ash-sand ratio of not less than 1:10 and a concentration of 60%-70%.

[0028] The filling material is filled in batches. After the lower layer is filled and cemented, the upper layer can be filled.

[0029] The filling material can be filled in each layer or multiple times according to the actual conditions of the collapsed area 2 and the water filter retaining wall 3.

[0030] The filling multiple of the filling pipe 4 is not greater than 5.0; wherein, the filling pipe 4 is required to be laid with a combustion-supporting clinker pipeline and fixed above the water filter retaining wall 3 with steel or other materials;

[0031] When filling the filling pipe 4 for the last time, the feeding port of the filling pipe 4 needs to be fixed at the highest point of the collapsed area 2 to ensure that the filling is completed.

[0032] A plurality of observation and exhaust holes 6 are provided at the top plate of the collapsed area 2, and the observation and exhaust holes 6 are used to judge the filling height and the exhaust function during the last filling.

[0033] Specifically, the upward filling method for large-scale collapsed voids in non-ferrous metal underground mines is as follows:

[0034] The first step is to fill the collapsed area: After the filling water retaining wall 3 is selected at the appropriate position of the tunnel 1 and built to the appropriate height, the filling pipe 4 is fixed, and the collapsed area 2 is filled in layers. After filling to the height of the retaining wall, the first step of filling is completed after the filling slurry solidifies. Figure 1 shown.

[0035] The layered filling needs to be carried out in several times according to the actual situation on site, with an interval of 12-24 hours between each layered filling. The next layered filling is carried out after the local stabilization to prevent the water filter retaining wall 3 from collapsing.

[0036] During the layered filling process, the filling pipe can be moved toward the inside of the collapsed area 2 according to actual conditions.

[0037] The second step is to fill the collapsed area: build a water filter retaining wall 3 of appropriate height at an appropriate position above the collapsed area in the first step. After fixing the filling pipe 4, fill the collapsed area in layers. After filling to the height of the retaining wall, wait for the filling slurry to solidify and complete the second step of filling. The layered filling boundary 5 is as follows: Figure 2 shown.

[0038] The layered filling needs to be carried out in several times according to the actual situation on site, with an interval of 12-24 hours between each layered filling. The next layered filling should be carried out after the local stabilization to prevent the collapse of the water filter retaining wall.

[0039] During the layered filling process, the filling pipe can be moved toward the inside of the collapsed area 2 according to actual conditions.

[0040] The third to several steps of filling the collapsed area: the same method as the second step of filling the collapsed area, until the last step of filling and top formation, such as Figure 3 As shown;

[0041] Filling and topping of the collapsed area: build a suitable water filter retaining wall 3 at the appropriate position of the filling top, build the water filter retaining wall 3 above the filling body 7 of the first collapsed area, and install and fix the observation vent 6 to the appropriate position of the collapsed area 2, and fix the feeding port of the filling pipe 4 to the highest point of the collapsed area 2, and fill in layers, observe the water outlet of the vent 6, and when slurry flows out of the vent at the highest point, the collapsed area is completed. Figure 4 shown.

[0042] Before the first vent hole discharges slurry, fill it several times according to the actual situation on site to prevent the water filter retaining wall from collapsing. After the vent hole discharges the filling slurry, continuous filling can be carried out.

[0043] The installation of observation vent holes needs to be carried out according to a certain gradient. After the slurry is discharged from the vent hole below, it can be blocked. At the same time, the filling height must be determined. 2-4 observation vent holes need to be installed at the highest point of the collapsed area to facilitate filling and topping.

[0044] To sum up, this application adopts a filling method to solve the problem of large-scale collapse of the roof of non-ferrous metal underground mines at the bottom elevation. The filling and topping are completed in layers through on-site filling pipes, slurry, and water filtration retaining walls multiple times to achieve the purpose of filling large-scale collapsed areas.

[0045] The invention has a simple method, wide applicability, simple materials, and flexibility. It can effectively solve the practical problem of large-scale collapse of the roof of a metal mine, improve safety, save manpower, material resources, and engineering costs, and has certain promotion value in solving the elevation gap at the bottom elevation of metal and non-metal mines.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for upward filling of large-scale collapsed areas in nonferrous metal underground mines, characterized in that: When a large area of ​​the surrounding rock of the top of the goaf (1) collapses, and after a period of observation, the collapsed area (2) is generally in a stable state, a water filter retaining wall (3) is laid in stages according to the actual situation on site, and a filling pipe (4) is laid above the water filter retaining wall (3), and a filling material is supplied into the filling pipe (4); wherein the filling material is a cemented filling material with a suitable lime-sand ratio, and the filling material forms a filling body (7) on one side of the water filter retaining wall (3); According to the actual collapse situation, the filter retaining wall (3) is built upward several times, and after the lower filling body (7) is cemented, the filter retaining wall (3) is built downward and filled; The water filter retaining wall (3) is 1.8-2 meters high and 1.5-2 meters wide according to actual conditions. The water filter retaining wall (3) is laid in a staggered manner, and gunny bags are laid on the inner side of the water filter retaining wall (3) and fixed. The filling material is made of graded tailings or whole tailings and cement or cement powder as aggregate, with a lime-sand ratio of not less than 1:10 and a concentration of 60%-70%; The filling multiple of the filling tube (4) is not greater than 5.0; The filling pipe (4) is required to be laid using a combustion-supporting clinker pipeline and fixed above the water filter retaining wall (3) with steel; During the layered filling process, the filling pipeline is moved to the inside of the collapsed area (2) according to the actual situation; Filling the collapsed area and completing the top filling: build a suitable water filter retaining wall (3) at a suitable position on the filling top, build the water filter retaining wall (3) above the filling body (7) of the first collapsed area, and install and fix the observation vent (6) to a suitable position of the collapsed area (2), and fix the feeding port of the filling pipe (4) to the highest point of the collapsed area (2), and carry out layered filling, observe the water outlet pipe of the vent (6), and when slurry flows out of the vent at the highest point, the filling of the collapsed area is completed; A plurality of observation and exhaust holes (6) are provided on the top plate of the collapsed area (2), and the observation and exhaust holes (6) are used to judge the filling height and exhaust function during the last filling.

2. The upward filling method for large-scale collapsed areas in non-ferrous metal underground mines according to claim 1 is characterized in that: The water filter retaining wall (3) can filter clean water, block filling slurry, and cannot collapse.

3. The upward filling method for large-scale collapsed areas in non-ferrous metal underground mines according to claim 2 is characterized in that: The water filter retaining wall (3) is filled with sandbags.

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