Open-stope subsequent filling method panel chamber blasting partition structure

Abstract

The utility model belongs to the technical field of underground mining, and particularly discloses an open-stope subsequent filling method panel chamber blasting partition structure. The blasting partition structure comprises a trench, a concrete blasting partition wall is poured at the position of a blasting boundary of the trench, the blasting partition wall is fixed to the bottom face, the side wall and the top plate of the trench, an air window is arranged at the position, close to the top plate of the trench, of the blasting partition wall, and a plurality of grooves are formed in the bottom face, the side wall and / or the top plate at the position of the blasting boundary of the trench at intervals. And the side part of the blasting partition wall is provided with a connecting part for filling the groove. The blasting partition wall is poured at the position of the blasting boundary of the trench to separate the panel and the dead zone, so that the trench top plate close to the dead zone can be protected from being damaged by blasting shock waves, normal charging of the fan-shaped holes at the position of the boundary can be protected, and wood shores of the trench and logs for sealing the dead zone of the trench can be saved; the device has the advantages of being simple in structure, convenient to construct, low in cost, safe and reliable.

Description

Technical Field

[0001] This utility model belongs to the field of underground mining technology, specifically relating to a simple, convenient, low-cost, safe and reliable open-field subsequent filling method for blasting isolation structure of mine stopes. Background Technology

[0002] The stope backfilling method combines the advantages of both stope and backfilling methods. Firstly, it shares similarities with the stope method in terms of stope structure, cutting layout, and mining technology. Then, during the mining process, tailings and waste rock are used to fill the ore hole. The unique feature of this method is the use of non-cemented backfilling to reduce operating costs while ensuring the stability of the goaf. This allows for efficient mining while effectively controlling ore loss and dilution, and preventing surface collapse and pollution. As a highly efficient and stable mining method, it plays a vital role in mining operations.

[0003] Currently, during maintenance of blasted stopes using the stope backfilling method, logs are typically used to seal the empty area within the panel trench to ensure safety, while the trench roof is usually temporarily supported by wooden supports. Although these measures can basically meet the operational needs of stope maintenance, they are not only costly and cumbersome in terms of sealing and support, but also have poor explosion-proof effect due to the log seals. This results in varying degrees of damage and collapse to the roof and sidewalls of the panel trench after each stope blast, increasing the risk of subsequent stope maintenance, the risk of roof and sidewall collapse in the empty area, the risk of landslides from residual ore, and the difficulty in sealing the empty area, which can lead to shock disasters. Therefore, stope maintenance in large-scale blasted stopes is one of the main underground hazards in the stope backfilling method. Furthermore, due to the poor explosion-proof effect, the deep holes around the blasting boundary line of the panel trench are severely damaged and deformed, making it impossible to clean the holes. In severe cases, one or two rows of holes at the blasting boundary line cannot be loaded with explosives, resulting in a large number of large pieces after the next blast, which seriously restricts the application of the open field filling method.

[0004] Therefore, how to eliminate the safety hazards of the open-stope filling method during the maintenance of blasting mining areas, and how to avoid damage and deformation of medium and deep holes around the blasting boundary line, so as to ensure normal charging and reduce the output rate of large blocks after blasting, are among the technical problems that the open-stope filling method urgently needs to solve. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a simple, convenient, low-cost, and safe open-field subsequent filling method for blasting partition structures in mine blocks.

[0006] This utility model is implemented as follows: it includes a trench, and a concrete blasting partition wall is poured at the blasting boundary line of the trench. The blasting partition wall is fixedly and enclosedly connected to the bottom, side walls, and top plate of the trench. A ventilation window that runs through the front and back is provided near the top plate of the trench. Multiple or several anchor rods are spaced apart on the bottom and / or side walls at the blasting boundary line of the trench. The bottom and / or side of the blasting partition wall is provided with a connecting part with a filling groove, or the anchor rods are embedded in the blasting partition wall.

[0007] Furthermore, the thickness of the blasting partition wall is greater than the width of the groove, and the blasting partition wall protrudes from the groove at least on the side facing the mine.

[0008] Furthermore, the main body and connecting parts of the blasting partition wall are cast simultaneously. The concrete grade of the blasting partition wall is C20, the thickness of the blasting partition wall is 0.6 to 1.0 m, and the wall has no reinforcing bars.

[0009] Furthermore, a rectangular or at least two circular ventilation windows are provided at the top of the blasting partition wall near the trench, and the ventilation windows on the blasting partition wall are arranged in a straight line or staggered.

[0010] Furthermore, the ventilation window is composed of a rectangular tube or a round tube embedded in the blasting partition wall, wherein the rectangular tube has a size of 0.5-0.7m × 0.5-0.7m, and the round tube has a size of φ0.2-0.3m.

[0011] Furthermore, at least one end of the rectangular tube or round tube protrudes from the blasting partition wall and a filter cover is fixedly provided at the protruding end. The filter cover is a multi-layer filter cloth tied to the protruding end of the rectangular tube or round tube, or a filter cover fastened to the protruding end of the rectangular tube or round tube, and a filter screen is fixedly provided on the filter cover.

[0012] Furthermore, the blasting partition wall is inclined with multiple diagonal braces on the side away from the mine and / or has a protective pile at the bottom, which is a waste rock pile or a pile of bagged tailings.

[0013] Furthermore, an inclined support platform with its bottom resting on the bottom of the trench is simultaneously poured on the lower part of the blasting partition wall on the side away from the mine. The inclined support platform is an integral concrete inclined platform extending to both sides of the trench or a concrete inclined brace set at intervals.

[0014] The beneficial effects of this utility model are:

[0015] 1. This utility model separates the panel and the empty area by pouring concrete blasting partition walls at the blasting boundary line of the panel trench. This effectively reduces the vibration and shock wave during large-scale blasting of the mine, protects the trench roof and sidewalls near the empty area from damage and collapse caused by the blasting shock wave, and avoids serious damage and deformation of the medium and deep holes around the blasting boundary line. This allows the fan-shaped holes at the boundary line to be loaded normally to reduce the yield of large blocks.

[0016] 2. This utility model reduces the impact of blasting shock waves on the blasting partition wall by setting a ventilation window at the top plate position of the blasting partition wall near the trench, while ensuring air flow between the panel area and the empty area; and by using a wall without reinforcement, the construction can be simplified and the cost can be reduced while ensuring the strength of the wall.

[0017] 3. This utility model uses a concrete-cast blasting partition wall to separate the panel area and the empty area, and the joint of the blasting partition wall is filled into the groove of the trench. This facilitates construction and allows the cast blasting partition wall to form a reliable integrated connection with the trench. This not only effectively improves the blast-proof effect of the blasting partition wall, but also, as a supporting wall, the concrete-cast blasting partition wall can save the wooden top supports in the trench and the round logs used to seal the empty area of ​​the trench, thus reducing costs.

[0018] 4. This utility model separates the goaf and the maintenance point trench by blasting the partition wall, controlling the risk at the source. It can avoid the object falling accident caused by the collapse of the roof and walls of the goaf and the landslide of residual ore, and reduce or even eliminate the safety hazards for maintenance personnel. It is of great significance to safety production management.

[0019] In summary, this utility model has the characteristics of simple structure, convenient construction, low cost, and safety and reliability. Attached Figure Description

[0020] Figure 1 This is one of the structural schematic diagrams of this utility model;

[0021] Figure 2 This is the second structural schematic diagram of the present invention;

[0022] Figure 3 for Figure 1 The left view;

[0023] Figure 4 for Figure 2 The left view;

[0024] In the diagram: 1-trench, 2-blasting partition wall, 3-ventilation window, 4-groove, 5-connection, 6-filter cover, 7-diagonal brace, 8-shelter protection, 9-sloping platform, 10-anchor bolt. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this does not limit the present invention in any way. Any changes or improvements made based on the teachings of the present invention shall fall within the protection scope of the present invention.

[0026] like Figures 1 to 4 As shown, this utility model includes a trench 1, and a concrete blasting partition wall 2 is poured at the blasting boundary line of the trench 1. The blasting partition wall 2 is fixedly and enclosedly connected to the bottom, side and top of the trench 1. A ventilation window 3 is provided through the front and back of the blasting partition wall 2 near the top of the trench 1. Multiple or several anchor rods 10 are provided at intervals on the bottom and / or side of the trench 1 at the blasting boundary line. The bottom and / or side of the blasting partition wall 2 are provided with a connecting part 5 for filling groove 4, or the anchor rods 10 are embedded in the blasting partition wall 2.

[0027] The thickness of the blasting partition wall 2 is greater than the width of the groove 4, and the blasting partition wall 2 protrudes from the groove 4 at least on the side facing the mine.

[0028] The main body of the blasting partition wall 2 and the connecting part 5 are cast simultaneously. The concrete grade of the blasting partition wall 2 is C20. The thickness of the blasting partition wall 2 is 0.6 to 1.0 m and the wall has no reinforcing bars.

[0029] The blasting partition wall 2 is provided with a rectangular or at least two circular ventilation windows 3 near the top plate of the trench 1. The ventilation windows 3 on the blasting partition wall 2 are arranged in a straight line or staggered.

[0030] The ventilation window 3 is composed of a rectangular tube or a round tube embedded in the blasting partition wall 2. The rectangular tube has a size of 0.5-0.7m × 0.5-0.7m, and the round tube has a size of φ0.2-0.3m.

[0031] At least one end of the rectangular tube or round tube protrudes from the blasting partition wall 2 and a filter cover 6 is fixedly installed on the protruding end. The filter cover 6 is a multi-layer filter cloth tied to the protruding end of the rectangular tube or round tube, or a filter cover fastened to the protruding end of the rectangular tube or round tube, and a filter screen is fixedly installed on the filter cover.

[0032] The blasting partition wall 2 is inclined with multiple diagonal braces 7 on the side away from the mine and / or has a protective pile 8 at the bottom, which is a waste rock pile or a pile of bagged tailings.

[0033] The blasting partition wall 2, on the side away from the mine, has an inclined support platform 9 with its bottom resting on the bottom of the trench 1. The inclined support platform 9 is an integral concrete inclined platform extending to both sides of the trench 1 or a concrete inclined brace set at intervals.

[0034] The working principle and process of this utility model:

[0035] like Figures 1 to 4 As shown, after the upward fan-shaped holes in trench 1 are constructed, at least two grooves 4 (0.3m long × 0.3m high × 0.5m thick) are cut at intervals on the bottom surface and / or sidewalls at the blasting boundary line of trench 1 (or anchor rods 10 are inserted). Then, a blasting partition wall 2 (concrete grade C20, wall thickness 0.8m, wall without reinforcement) is poured in trench 1 at the grooves 4, so that the bottom and / or sides of the blasting partition wall 2 form a connection part 5 that fills the grooves 4. Alternatively, a blasting partition wall 2 (concrete grade C20) is poured in trench 1 at the anchor rods 10. 20, wall thickness 0.8 meters, wall without reinforcing bars), so that the anchor bolt 10 is wrapped inside the blasting partition wall 2; and three φ0.2m ventilation windows 3 are reserved near the top plate of the trench 1 (if necessary, filter covers are installed at the protruding end of the ventilation windows 3 to filter out blasting dust) to reduce the damage to the trench 1 by each mine blasting, thereby reducing the maintenance risk and avoiding the exposure of maintenance personnel in the top support rock and the edge of the void when sealing the void in the large blasting mining area. It also solves the difficulty of sealing the void, improves the safety of mining area maintenance and speeds up the construction efficiency of the production panel. If necessary, multiple diagonal braces 7 can be installed at an angle on the side of the blasting partition wall 2 away from the mine, and a protective pile 8 made of waste rock or bagged tailings can be piled up at the bottom of the blasting partition wall 2, or an inclined protective platform 9 with its bottom resting on the bottom of the trench 1 can be poured simultaneously at the bottom of the side of the blasting partition wall 2 away from the mine, thereby improving the ability of the blasting partition wall 2 to resist blasting shock waves.

[0036] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A blast cut structure of a stope in a block of a surface subsequent filling method, comprising a trench (1), characterized in that: The trench (1) is poured with a concrete blast partition wall (2) at the position of the blast demarcation line, the blast partition wall (2) is fixedly and closely connected with the bottom, side and roof of the trench (1), the blast partition wall (2) is provided with a front and rear through air window (3) near the position of the roof of the trench (1), a plurality of grooves (4) or a plurality of anchor rods (10) are arranged on the bottom and / or side of the trench (1) at the position of the blast demarcation line, the bottom and / or side of the blast partition wall (2) is provided with a connecting part (5) for filling the grooves (4), or the anchor rods (10) are embedded into the blast partition wall (2).

2. The blast partition structure of the sublevel subsequent filling method stope and chamber according to claim 1, characterized in that: The thickness of the blast partition wall (2) is greater than the width of the groove (4), and the blast partition wall (2) protrudes from the groove (4) at least on one side facing the mine chamber.

3. The blast cut structure for a sublevel subsequent filling method stope room according to claim 1, characterized in that: The body of the blast partition wall (2) is synchronously poured with the connecting part (5), the concrete grade of the blast partition wall (2) is C20, the thickness of the blast partition wall (2) is 0.6-1.0m, and the wall body is not reinforced.

4. A stope sublevel blast partition structure for use in a bench and fill method according to claim 1, 2 or 3, characterised in that: The blast partition wall (2) is provided with a rectangular or at least two circular air windows (3) near the position of the roof of the trench (1), the air windows (3) on the blast partition wall (2) are arranged in a straight line or staggered.

5. The blast structure of a sublevel subsequent filling method panel and chamber according to claim 4, characterized in that: The air window (3) is composed of a rectangular pipe or a circular pipe embedded in the blast partition wall (2), the size of the rectangular pipe is 0.5-0.7m x 0.5-0.7m, and the size of the circular pipe is φ0.2-0.3m.

6. The blast structure of a sublevel subsequent filling method panel and chamber according to claim 5, characterized in that: At least one end of the rectangular pipe or the circular pipe protrudes from the blast partition wall (2) and is fixedly provided with a filter cover (6), the filter cover (6) is a plurality of filter cloths bound on the protruding end of the rectangular pipe or the circular pipe, or a filter cover buckled on the protruding end of the rectangular pipe or the circular pipe, and the filter cover is fixedly provided with a filter screen.

7. The blast structure of a sublevel subsequent filling method panel and chamber according to claim 4, characterized in that: A plurality of inclined braces (7) are arranged on the side of the blast partition wall (2) away from the mine chamber, and / or a protective pile (8) is stacked at the lower part, the protective pile (8) is a waste rock pile or a bagged tailings pile.

8. The blast structure of a sublevel subsequent filling method panel and chamber according to claim 4, characterized in that: The blast partition wall (2) is synchronously poured with an inclined retaining platform (9) at the lower part of the side away from the mine chamber, the bottom of the inclined retaining platform (9) is located on the bottom of the trench (1), the inclined retaining platform (9) is an integral concrete inclined platform extending to the two sides of the trench (1) or a plurality of concrete inclined braces.

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