Retaining wall with tailing cemented filling brick structure for underground mine
By incorporating horizontal steel bars and diagonal braces within the retaining wall, and combining this with the design of drainage pipes, the problem of insufficient compressive strength and anti-slip properties of brick retaining walls was solved. This enabled rapid and low-cost retaining wall connections, ensuring the safety and applicability of mine backfilling.
Patent Information
- Application Number
- CN202520222374.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-12
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-02-12
AI Technical Summary
Existing brick retaining walls lack sufficient compressive and anti-slip strength during underground mine filling processes, and their construction is slow and costly, making it difficult to meet the applicability requirements of different roadway structures.
The retaining wall is constructed using a tailings-bonded brick structure. Horizontal steel bars and diagonal braces are installed inside the retaining wall, which is anchored to the roadway rock wall. Water pipes are installed on the retaining wall to form a strong connection structure, which enhances the compressive and anti-slip capabilities. The construction is also fast and low-cost.
It achieves a firm connection between the retaining wall and the roadway, enhances the resistance to pressure and slippage, prevents the filling slurry from flowing out, ensures safe production in the mine, has a wide range of applications, fast construction progress, and low cost.
Smart Images
Figure CN223825052U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a structural retaining wall for blocking access roads and tunnels during tailings cementation backfilling in underground mines, belonging to the technical field of tailings backfilling structures in underground mines. Background Technology
[0002] Currently, underground mines must use backfilling mining methods to promptly fill underground goafs and abandoned roadways with high-concentration slurry during production. To ensure the filling effect and prevent slurry loss and pollution of the underground environment, the filled goaf or abandoned roadway must be isolated from adjacent roadways. This requires constructing backfill retaining walls at the mine entrance or abandoned roadway exit.
[0003] Currently, the retaining walls used in underground mines include wooden retaining walls, brick retaining walls, steel retaining walls, and reinforced concrete retaining walls. Based on past experience, each type has its own advantages and disadvantages: wooden retaining walls are easy to construct, but their compressive strength and anti-slip properties are relatively weak, making them only suitable for well-designed structures with cross-sections less than 3 meters. 2 There are various types of retaining walls available for infill construction. Steel retaining walls offer high strength but are difficult to construct, require long hot work periods, and are expensive. While they can be recycled, they require extensive cutting and dismantling, resulting in high costs. Reinforced concrete retaining walls also offer high strength but have long construction periods and are expensive, making them suitable for ultra-high cross-section retaining walls. Brick retaining walls offer moderate strength, fast construction, and low cost, making them ideal for infill retaining walls. Therefore, among various infill retaining walls, brick retaining walls have the best adaptability and a wide range of applications. However, the strength of ordinary brick retaining walls is not high enough, and improvements are needed to ensure safe infill construction. Utility Model Content
[0004] The technical problem to be solved by this utility model is to provide a tailings cemented filling brick structure retaining wall for underground mines. This brick structure retaining wall has sufficient compressive strength and anti-slip strength, can be tightly sealed without leakage, and has fast construction progress, low cost, and wide applicability to roadways with different structures.
[0005] The technical solution to the above technical problem is:
[0006] A tailings cemented brick retaining wall for underground mines includes a retaining wall, reinforcing bars, diagonal braces, and a drainage pipe. The retaining wall and diagonal braces are constructed of sintered common bricks. The retaining wall is located at the entrance of the mine exit or abandoned roadway in the filling mining area. The top, bottom, and two ends of the retaining wall are embedded in the top, bottom, and side walls of the roadway, respectively. The retaining wall contains multiple horizontal reinforcing bars, with both ends of the reinforcing bars anchored in the roadway rock walls on both sides of the retaining wall. The diagonal braces are constructed on the side of the retaining wall away from the tailings. A drainage pipe is installed on the retaining wall, and the drainage pipe is perpendicular to the plane of the retaining wall.
[0007] The tailings cemented brick structure retaining wall of the above-mentioned underground mine has grooves with a depth greater than 100mm carved on the top, bottom and side surfaces of the roadway and the rock wall above, below and on both sides of the retaining wall. The width of the grooves matches the thickness of the retaining wall. The top, bottom and two ends of the retaining wall are respectively built into the grooves of the roadway. Multiple steel bars in the retaining wall are spaced 500mm apart vertically and are tied together. The two ends of the steel bars are anchored in the rock wall of the roadway to a depth of not less than 500mm.
[0008] The tailings cemented brick structure retaining wall of the above-mentioned underground mine has a diagonal brace that is triangular in shape and has a width of more than 500 mm. One right-angled side of the diagonal brace is integrated with the outer side of the retaining wall, and the other right-angled side of the diagonal brace is embedded in a groove on the bottom of the roadway that is perpendicular to the retaining wall. There are one or more diagonal braces on the outside of the retaining wall, and the distance between adjacent diagonal braces is 2000 mm.
[0009] The tailings cemented brick structure retaining wall of the aforementioned underground mine has multiple water discharge pipes installed in it. These pipes are arranged vertically along the middle vertical line of the retaining wall, with a distance of 1500mm between adjacent pipes. Both ends of the water discharge pipes extend out of the retaining wall, and butterfly valves are installed on the outside of the pipes.
[0010] The beneficial effects of this utility model are:
[0011] This utility model adopts a brick masonry retaining wall structure. The retaining wall extends into the top, bottom and side rock walls of the tunnel and is reinforced with steel bars to ensure a firm connection between the retaining wall and the mine tunnel. The outer side of the retaining wall has diagonal bracing, which can increase the compressive and shear resistance of the retaining wall and prevent squeezing deformation. The water discharge pipe can discharge the water in the empty area, and there is no need to hang a filter pipe in the empty area.
[0012] This utility model has the advantages of requiring fewer construction materials, faster construction progress, lower cost, and wider applicability. It can be used for all types of retaining walls except for ultra-high retaining walls. Compared with other structural retaining walls, the connection between the retaining wall and the roadway is more solid, with sufficient compressive and anti-slip capacity, significantly improving the compressive and shear capacity of the retaining wall. It can withstand the lateral pressure of the filling slurry and the vertical pressure of the roof. It can effectively isolate high-concentration tailings cemented filling, prevent the retaining wall from collapsing and the filling slurry from flowing out, and ensure the safe production of the mine. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model;
[0014] Figure 2 yes Figure 1 AA section view;
[0015] The markings in the diagram are as follows: 1. Lane; 2. Retaining wall; 3. Diagonal brace; 4. Water pipe; 5. Reinforcing steel. Detailed Implementation
[0016] This utility model consists of a retaining wall 2, a diagonal brace 3, a water pipe 4, and a steel bar 5.
[0017] Figure 1 , 2 The diagram shows that retaining wall 2 and diagonal brace 3 are constructed of ordinary sintered bricks, using the mortar-laying method with staggered top and bottom joints and overlapping inside and outside. The mortar joint thickness is 10mm. Retaining wall 2 and diagonal brace 3 are finished with cement mortar with a finish thickness of 10mm.
[0018] Figure 1 , 2 The diagram shows that retaining wall 2 is located at the entrance of the ore exit roadway or abandoned roadway in the filling mining area, and retaining wall 2 is perpendicular to the length direction of roadway 1. Retaining wall 2 is constructed in a relatively stable area of surrounding rock. Before constructing the retaining wall, the loose rocks in the roadway at the construction location are cleaned up, and a groove 100mm deep and 500mm wide is dug. The top, bottom, and sides of retaining wall 2 are respectively built into the grooves on the top, bottom, and side walls of roadway 1.
[0019] Figure 1 , 2 The display shows that the retaining wall 2 has multiple horizontal reinforcing bars 5 inside, with both ends of the reinforcing bars 5 anchored in the tunnel rock walls on both sides of the retaining wall 2. The reinforcing bars 5 are made of ø8 steel bars, with multiple reinforcing bars 5 spaced 500mm apart vertically, and the multiple reinforcing bars 5 are tied together. The depth of the anchorage of the two ends of the reinforcing bars 5 in the tunnel rock walls is not less than 500mm.
[0020] The retaining wall 2 with the above structure extends into the top, bottom and side rock walls of the roadway and is reinforced with steel bars 5, so that the retaining wall 2 is firmly connected to the ore exit roadway 1, has sufficient compressive and anti-slip capacity, can withstand the lateral pressure of the filling material in the goaf and the vertical pressure of the roof, and is safe and convenient to use.
[0021] Figure 1 , 2 The diagram shows that a diagonal brace 3 is constructed on the side of the retaining wall 2 away from the tailings, with its front end connected to the wall surface of the retaining wall 2. The diagonal brace 3 is a triangular structure with a width greater than 500mm. One right-angled side of the diagonal brace 3 is integrally constructed with the outer surface of the retaining wall 2, while the other right-angled side is embedded in a groove perpendicular to the retaining wall on the bottom surface of the tunnel 1. The diagonal brace 3 increases the compressive and shear resistance of the retaining wall 2, preventing deformation due to compression.
[0022] The height, length, and number of diagonal braces 3 are determined based on the cross-sectional dimensions of roadway 1. When the roadway cross-section is less than 3500×3500mm, no diagonal braces 3 are required. When the width of roadway 1 is 4000mm, one diagonal brace 3 is required. When the width is greater than 4000mm, one additional diagonal brace 3 is added for every 2000mm increase in width. The thickness of diagonal brace 3 is 500mm, and the upper end of diagonal brace 3 is 1000mm lower than the top surface of roadway 1, with a slope of 45 degrees.
[0023] Figure 1 , 2 The diagram shows that drain pipes 4 are installed on the retaining wall 2, perpendicular to the plane of the retaining wall 2. Multiple drain pipes 4 are arranged vertically along the middle vertical line of the retaining wall 2, with a distance of 1500mm between adjacent drain pipes 4. Both ends of the drain pipes 4 extend out of the retaining wall 2. The drain pipes 4 are DN100 ordinary steel pipes with external flanges and are connected to butterfly valves. The drain pipes 4 can discharge water from the empty area, eliminating the need for hanging filter pipes in the empty area.
[0024] An embodiment of this utility model is as follows:
[0025] The wall thickness of retaining wall 2 is 500mm, and the top, bottom and sides of the wall extend 100mm into the top, bottom and side walls of tunnel 1.
[0026] The diameter of steel bar 5 is 8mm. Both ends of the steel bar are anchored in the rock wall of the tunnel to a depth of 500mm. The distance between adjacent steel bars is 500mm.
[0027] The thickness of the diagonal brace 3 is 500mm, the distance between the top of the diagonal brace 3 and the roof of the roadway is 1000mm, and the slope of the diagonal brace 3 is 45°.
[0028] The drain pipe 4 is a DN100 steel pipe, and the distance between adjacent drain pipes 4 is 1500mm.
Claims
1. A tailings cemented brick retaining wall for underground mines, characterized in that: It includes a retaining wall (2), steel bars (5), diagonal bracing (3), and a drain pipe (4). The retaining wall (2) and diagonal bracing (3) are constructed of sintered common bricks. The retaining wall (2) is located at the entrance of the mine or abandoned roadway in the filling mine. The top, bottom and two ends of the retaining wall (2) are embedded in the top, bottom and side walls of the roadway (1), respectively. There are multiple horizontal steel bars (5) in the wall of the retaining wall (2). The two ends of the steel bars (5) are anchored in the roadway rock walls on both sides of the retaining wall (2). The diagonal bracing (3) is built on the side of the retaining wall (2) away from the tailings. A drain pipe (4) is installed on the wall of the retaining wall (2). The drain pipe (4) is perpendicular to the wall plane of the retaining wall (2).
2. The tailings cemented backfill brick structure retaining wall for underground mines according to claim 1, characterized in that: Grooves with a depth greater than 100mm are chiseled on the top, bottom and rock walls of the tunnel (1) above, below and on both sides of the retaining wall (2). The width of the grooves matches the wall thickness of the retaining wall (2). The top, bottom and two ends of the retaining wall (2) are built in the grooves of the tunnel (1). Multiple steel bars (5) inside the retaining wall (2) are spaced 500mm apart vertically. The multiple steel bars (5) are tied together. The two ends of the steel bars (5) are anchored in the tunnel rock wall to a depth of not less than 500mm.
3. The tailings cemented backfill brick structure retaining wall for underground mines according to claim 1, characterized in that: The diagonal brace (3) is a triangular wall with a width greater than 500mm. One right-angled side of the diagonal brace (3) is integrated with the outer side of the retaining wall (2). The other right-angled side of the diagonal brace (3) is embedded in a groove on the bottom surface of the alley that is perpendicular to the retaining wall (2). There are one or more diagonal braces (3) on the outside of the retaining wall (2), and the distance between adjacent diagonal braces (3) is 2000mm.
4. The tailings cemented backfill brick structure retaining wall for underground mines according to claim 1, characterized in that: The retaining wall (2) is equipped with multiple drain pipes (4). The multiple drain pipes (4) are arranged vertically in the middle of the retaining wall (2). The distance between adjacent drain pipes (4) is 1500mm. The two ends of the drain pipes (4) extend out of the wall of the retaining wall (2). A butterfly valve is installed on the outside of the drain pipes (4).