Gabion grid reinforcing system for preventing backfill dumping site of open pit from being damaged

Abstract

The invention discloses a gabion gabion grid reinforcing system for preventing a backfill dumping site of an open pit from being damaged. The gabion gabion grid reinforcing system comprises an inner dumping site, a base, gabion gabion grids, backfill discrete materials and inclinometer pipes. The inner dumping site is used for piling and discharging backfill discrete materials; the base is an exposed surface after mining of the strip mine pit is completed, is used as a supporting land for subsequent dumping operation, and provides geological conditions for laying of gabion gabion grids; the gabion gabion grid is laid on the surface of the base and used for maintaining and reinforcing the multi-layer slope structure formed by the backfill discrete materials. Backfill discrete materials are transported to the inner dumping site through the dumping truck and dumped into the inner dumping site; and the inclinometer pipe is used for monitoring the displacement of the soil body subsequently. According to the method, the shear strength of backfill discrete materials is remarkably improved, then the stability of the side slope of the waste dump is stabilized, horizontal deformation of the dumping steps in the slope direction is effectively restrained, and deformation and large-volume landslide possibly caused by external erosion of the side slope of the waste dump are avoided.

Description

Technical Field

[0001] The invention belongs to the field of gabion meshes, and in particular relates to a gabion mesh reinforcement system for preventing damage to an open-pit mine backfill dump. Background Art

[0002] The advancement of existing technologies has greatly improved the efficiency of mining resources, and the corresponding treatment of backfill bulk materials such as mined soil, rocks and waste materials. The existing treatment method mainly selects abandoned open-pit mines in the same mining area as the dump site, and transports them to the edge of the unloading platform of the dump site by dump trucks and other equipment for unloading operations. The unloaded backfill bulk materials will form multiple layers of dump steps in the dump site.

[0003] However, the formation of the dumping steps mentioned above poses a great safety hazard. The dumping steps are artificially created, and the operation of the next dumping step is often carried out after one dumping step is formed. Therefore, the soil of the previous step does not have time to consolidate naturally, and its inherent soil strength is far from reaching the naturally formed stable state. This step-by-step dumping method is irregular in time, the dumping strength is unstable, and it is impossible to grasp whether the steps formed by the dumping have stable physical properties, and thus it is impossible to predict the strength and possible deformation of the soil in the dumping site. With the passage of time or the satisfaction of disaster conditions, the soil system that lacks a stable state may deform, leading to landslides. Although modern mining has optimized the internal backfilling process to address the problem of landslides in backfill dumps, the deformation problem during the backfilling process is still prominent, threatening the safe operation of mines. Summary of the invention

[0004] In order to solve the problem that the existing mine dump dump steps are not strong enough and easily deformed, and then a large amount of landslide occurs, the present invention provides a gabion mesh reinforcement system for preventing the damage of the open pit backfill dump, including:

[0005] Internal dumping ground, base, gabion net, backfill bulk material, inclinometer tube;

[0006] The inner dump is used for backfilling bulk materials;

[0007] The substrate is the exposed surface of the open pit after mining, which is used as the supporting land for subsequent earth dumping operations and provides geological conditions for the laying of gabion mesh;

[0008] The gabion mesh is laid on the surface of the base to maintain and reinforce the multi-layer slope structure composed of backfill bulk materials;

[0009] The backfill bulk material is transported to the inner dumping ground by a dump truck and dumped therein;

[0010] The inclinometer tube is used for subsequent monitoring of soil displacement.

[0011] Preferably, the internal dump is a stope selected within the mining area where mining has been completed, or an open pit that has been closed in advance;

[0012] When there are multiple open pits in the open pit mine that has been closed earlier, the open pit that has been closed earlier is preferably used as the internal dumping ground;

[0013] The site selection of the spoil dump is based on the local natural environment, avoiding mines that may have conditions for forming natural disasters, and at the same time taking pre-set drainage measures.

[0014] Preferably, the inner dump is also used to provide a slag discharge area for a newly mined mining area, so that mining operations in adjacent mining areas and slag discharge operations in the inner dump can be carried out synchronously.

[0015] Preferably, the surface of the substrate is determined by the depth of mining excavation, and the physical properties of the substrate remain the state after the mine is mined, and is a soil body formed by natural deposition.

[0016] Preferably, the gabion mesh is composed of a steel mesh and hard crushed stones discarded from the mining area, and is laid on the key layer steps of the inner dump;

[0017] The length of the gabion grid is determined by the distance from the edge of the base to the edge of the current step, and the height is determined by the current step height. The width of the gabion grid and the distance between two adjacent gabions are set according to needs, and multiple gabions are arranged in a "well" shape after being staggered.

[0018] Preferably, the gabion mesh is constructed of hard block crushed stones to form stone cubes in a "cross" shape, and the stone cubes are enclosed by a flexible high-strength steel wire mesh to form a layered integral gabion mesh.

[0019] Preferably, the process of laying the gabion mesh on the key layer steps of the inner dumping ground includes:

[0020] The gabion mesh is laid on the part of the inner spoil dump steps that is relatively easy to deform and bear greater stress, and is laid on the key layer and the progress is made layer by layer along with the steps.

[0021] Preferably, the key layer for laying the gabion mesh is the dumping site steps which are prone to deformation due to the passage of time and external conditions, and thus may cause large-scale landslides;

[0022] The selected number of the key layers includes 1-5 layers.

[0023] Preferably, the backfill bulk material is collected from the mine to be mined, including abandoned ore bodies and mined soil in the mine to be mined;

[0024] The abandoned ore bodies and mined soil in the mining area to be mined include but are not limited to fine sand excavated during mining or excavation in the mining area, and crushed rock and slag extracted during the mining process.

[0025] Preferably, the inclinometer tube is connected by an inclinometer tube connecting sleeve to form a PVC pipe with multiple sections, extending from the side of the gabion biner mesh to the ground surface, and the opening of the inclinometer tube is covered on the ground surface to obtain monitoring data of soil displacement through inclinometer measurement.

[0026] Compared with the prior art, the present invention has the following advantages and technical effects:

[0027] The gabion mesh of the present invention only requires steel wire mesh and relatively hard crushed stone as the constituent materials, and the raw materials are simple, wherein the crushed stone can be obtained locally from the mining area, and the laying process requires less labor, thereby requiring lower costs and a shorter laying period.

[0028] The gabion mesh in the present invention is laid on the key layer of the spoil dump steps. Compared with the spoil dump operation without any reinforcement treatment, the present invention significantly improves the shear strength of the backfill bulk material, thereby stabilizing the stability of the spoil dump slope, effectively suppressing the horizontal deformation of the spoil dump steps along the slope direction, and avoiding the deformation and large-scale landslide of the spoil dump slope due to external erosion.

[0029] The gabion mesh of the present invention has a simple process, does not require workers to have a high level of construction technology, and is relatively easy to use. At the same time, the simple process has little interference with the existing backfilling process, ensuring that the soil discharge operation is steadily advanced according to the original design.

[0030] The inclinometer tube in the present invention further guarantees the safety brought by the gabion grid. With only a small amount of investment, the real-time situation of the slope is converted into data to provide a visual safety basis for future construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0032] Figure 1 This is an overall schematic diagram of a spoil dump according to an embodiment of the present invention;

[0033] Figure 2 A partial cross-sectional schematic diagram of a spoil dump according to an embodiment of the present invention;

[0034] Figure 3 A schematic diagram of a gabion mesh according to an embodiment of the present invention;

[0035] Figure 4 A three-dimensional schematic diagram of an embodiment of the present invention;

[0036] Figure 5 It is a partial enlarged view of an embodiment of the present invention;

[0037] Among them, 1. Inner spoil dump; 2. Mining area to be mined; 3. Gabion mesh; 4. Location of gabion mesh to be laid; 5. Crushed stones; 6. Gabion mesh junction; 7. Base; 8. Backfill bulk material; 9. High-strength flexible steel wire; 10. Inclinometer tube; 11. Inclinometer tube connecting sleeve. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0040] like Figure 1-5 As shown, in this embodiment, a gabion mesh 3 reinforcement system for preventing damage to an open pit backfill dump is provided, comprising:

[0041] Internal dump 1, base 7, gabion net 3, backfill bulk material 8, inclinometer tube 10;

[0042] The inner dump 1 is a stope where mining in the mining area has been completed, or an open pit stope that has been closed in advance, and is used for backfilling bulk materials 8;

[0043] The base 7 is the exposed surface after the open pit is mined, and serves as the supporting land for the subsequent dumping operation. The surface of the base 7 is the position 4 for laying the gabion mesh, which provides solid geological conditions for laying the gabion mesh 3.

[0044] The gabion mesh 3 is laid on the surface of the base 7 and is composed of a steel mesh and large hard gravel discarded from the mining area, and is used to maintain and reinforce the multi-layer slope structure composed of the backfill bulk material 8;

[0045] The backfill bulk material 8 is the abandoned ore body, mined soil, etc. in the mining area, which is transported to the spoil dump by a transportation tool such as a spoil truck and dumped therein.

[0046] Inclinometer tube 10 is a PVC pipe pre-buried to facilitate subsequent monitoring of soil displacement.

[0047] Furthermore, the internal dump 1 is a stope selected within the mining area where mining has been completed, or when there are multiple open pits, the pit that has been closed in advance is preferably selected as the internal dump. The site selection of the dump needs to be combined with the local natural environment, and should avoid pits that may have conditions for forming natural disasters. At the same time, pre-set drainage measures should be taken to avoid harmful situations such as landslides.

[0048] Furthermore, the inner dump 1 can provide a slag discharge area for a newly mined mining area, so that mining operations in adjacent mining areas can be carried out synchronously with slag discharge operations in the inner dump 1 .

[0049] Furthermore, the base 7 is the bottom of the mine pit that maintains and reinforces the original geological structure, and the surface of the base 7 is determined by the depth of mining excavation. The physical properties of the base 7 remain the state of the mine pit after mining, and it is a soil body formed by natural deposition. The subsequent backfill bulk material 8 will be discharged on the surface of the base 7.

[0050] Furthermore, the gabion mesh 3 is constructed with relatively large hard block crushed stones to form a "cross" cross shape gabion mesh intersection 6 to obtain stone cubes, which are then sealed by flexible high-strength steel wire mesh to form a layered integral gabion mesh 3.

[0051] The gabion net 3 is laid on the key layer steps of the spoil dump. Specifically, the gabion net 3 is laid on the part of the spoil dump steps that is relatively easy to deform and bear greater stress, and is laid on the key layer and the progress is made as the steps go up layer by layer. The length of the gabion net 3 is determined by the distance from the edge of the base 7 to the edge of the current step, and the height is determined by the current step height. The width of the gabion net 3 and the distance between two adjacent gabion nets 3 are set according to the needs. In this embodiment, the width of the gabion net 3 is 10 meters, and the distance between two adjacent gabion nets 3 is 100 meters. Multiple gabion nets 3 are arranged in a "well" shape after being staggered.

[0052] Furthermore, the key layer for laying the gabion mesh 3 is the dumping step which is prone to deformation under the influence of landslide time and external conditions, and may lead to large-scale landslide. The number of key layers selected is generally about 1-5 layers, and 3 layers are selected in this embodiment.

[0053] Furthermore, the backfill bulk material 8 is collected from the mining area 2 to be mined, and is composed of fine sand excavated during mining or excavation in the mining area, crushed rock and slag extracted during the mining process, etc. After the gabion mesh 3 in the selected spoil dump is laid, the spoil dumping operation of the backfill bulk material 8 is carried out in the spoil dump, and the collected material is discarded as backfill soil into the inner spoil dump 1.

[0054] Furthermore, the inclinometer tube 10 is used to provide a prerequisite for the subsequent detection of slope stability, and the number is determined according to the construction conditions on site. The pre-buried inclinometer tube 10 is used to provide reliable assistance for subsequent construction and detection by using the measured data through the inclinometer used for future detection. The inclinometer tube 10 specifically extends multiple sections of inclinometer tube 10 from the side of the gabion mesh to the surface through the inclinometer tube connecting sleeve 11, and covers the opening of the inclinometer tube 10 on the surface to prevent debris from entering the pipeline and affecting the measurement of the inclinometer.

[0055] Example

[0056] like Figure 1 As shown, this embodiment shows and utilizes the existing spoil dump as the inner spoil dump 1 of the mining area, which is responsible for receiving the backfill bulk materials 8 generated in the mining area, and the subsequent spoil dumping operations and the laying of the gabion bin mesh 3 are all in the inner spoil dump 1. The inner spoil dump 1 is selected based on the existing mining area conditions, and the stope after the mining is completed can be used as the inner spoil dump 1, and safety issues must be paid attention to during the backfilling operation, and protective measures at an effective distance must be taken.

[0057] The backfill bulk material 8 is collected from the mining area 2 to be mined, and the collected material is discarded as backfill soil into the inner dump 1. Figure 2 As shown, stacking operation is carried out on the base 7 of the inner dump 1, and steps are formed by stacking from bottom to top. At the same time, the key layer is selected as the construction position of the subsequent gabion net 3 during the stacking process; the inclinometer tube 10 is installed at the side of the gabion net according to the on-site conditions. The inclinometer tube 10 gradually moves upward with the stacking of the steps, and is fixed and extended to the surface through the inclinometer tube link sleeve 11. The gabion net 3 is constructed from the edge of the stacked dumping step to the base 7 position. The constructed gabion net is wound with high-strength flexible steel wire 99, and is filled with large gravel 5 collected on-site in the mining area. The gabion net 3 is about 10 meters wide as a whole, and the height is determined according to the height of the currently selected key layer step. Each gabion net 3 is 100 meters apart and arranged in a "well" shape. The specific specifications of the gabion net 3 are reasonably selected while ensuring the overall strength of the gabion net 3. In the subsequent repeated dumping operation, the gabion net 3 is extended as the dumping step is extended, so that the constructed gabion net 3 is extended to the edge of the current dumping step. In the subsequent dumping field operation, the dumping stacking and the gabion net 3 are alternately constructed until the overall dumping operation of the inner dumping field 1 is completed.

[0058] The present invention utilizes the inner dumping ground of the open-pit goaf, the base of the inner dumping ground surface and the gabion net laid on the base, and after the gabion net is laid, the bulk material is loaded and unloaded by dump trucks and the like. Among them, the gabion net is made of the existing large pieces of hard crushed stone, flexible high-strength steel wire mesh and a small amount of manual weaving in the mining area. The gabion net is flexible as a whole, and is specifically formed by building several layers of gabions in a "cross" cross shape with relatively hard stones, and then sealed by flexible high-strength steel wire mesh. The gabion net is about 10 meters wide, and the height is determined according to each layer of dumping steps, and the spacing between each gabion net is about 100 meters. Inclinometer tubes extending to the surface are installed on the side of the gabion net. The gabion net design adopted by the present invention effectively reduces the possibility of large-scale landslides in the inner dumping ground by improving the shear strength of the backfilled bulk material. At the same time, an inclinometer tube is added near the gabion net to facilitate the subsequent detection of soil displacement. The present invention only requires a steel wire mesh and a small amount of labor. The steel wire mesh is manually constructed into a gabion mesh structure. The interior of the gabion mesh is filled with hard fillers. The fillers are made of relatively hard crushed stones available in the mining area. The materials are locally available and have low cost. There is little interference with the existing backfilling process. The stability of the landslide in the spoil dump is effectively improved with less resources and manpower, which greatly protects local property and personal safety.

[0059] The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A gabion reinforcement system for preventing damage to an open pit backfill dump, characterized in that: include: Internal dumping ground, base, gabion net, backfill bulk material, inclinometer tube; The inner dump is used for backfilling bulk materials; The substrate is the exposed surface of the open pit after mining, which is used as the supporting land for subsequent earth dumping operations and provides geological conditions for the laying of gabion mesh; The gabion mesh is laid on the surface of the base to maintain and reinforce the multi-layer slope structure composed of backfill bulk materials; The backfill bulk material is transported to the inner dumping ground by a dump truck and dumped therein; The inclinometer tube is used for subsequent monitoring of soil displacement.

2. The gabion reinforcement system for preventing the damage of the open-pit mine backfill dump according to claim 1 is characterized in that: The internal dump is a stope selected within the mining area where mining has been completed, or an open pit that has been closed in advance; When there are multiple open pits in the open pit mine that has been closed earlier, the open pit that has been closed earlier is preferably used as the internal dumping ground; The site selection of the spoil dump is based on the local natural environment, avoiding mines that may have conditions for forming natural disasters, and at the same time taking pre-set drainage measures.

3. The gabion reinforcement system for preventing the damage of the open-pit mine backfill dump according to claim 1 is characterized in that: The inner dump is also used to provide a slag discharge area for a newly mined mining area, so that mining operations in adjacent mining areas and slag discharge operations in the inner dump can be carried out synchronously.

4. The gabion reinforcement system for preventing the destruction of the open-pit mine backfill dump according to claim 1 is characterized in that: The surface of the substrate is determined by the depth of mining excavation, and the physical properties of the substrate remain the state after the mine is mined, and it is a soil body formed by natural deposition.

5. The gabion reinforcement system for preventing the damage of the open pit backfill dump according to claim 1 is characterized in that: The gabion mesh is composed of steel wire mesh and hard crushed stones discarded from the mining area, and is laid on the key layer steps of the inner dump; The length of the gabion grid is determined by the distance from the edge of the base to the edge of the current step, and the height is determined by the current step height. The width of the gabion grid and the distance between two adjacent gabions are set according to needs, and multiple gabions are arranged in a "well" shape after being staggered.

6. The gabion reinforcement system for preventing damage to the open pit backfill dump according to claim 1 is characterized in that: The gabion mesh is constructed of hard block crushed stones to form a "cross" cross-shaped stone cube, and the stone cube is enclosed by a flexible high-strength steel wire mesh to form a layered integral gabion mesh.

7. The gabion reinforcement system for preventing the damage of the open pit backfill dump according to claim 5 is characterized in that: The process of laying the gabion mesh on the key layer steps of the inner dumping ground includes: The gabion mesh is laid on the part of the inner spoil yard steps that is relatively easy to deform and bear greater stress, and is laid on the key layer and the progress is made layer by layer along the steps.

8. The gabion reinforcement system for preventing the damage of the open pit backfill dump according to claim 5 is characterized in that: The key layer for laying the gabion mesh is the dump steps which are prone to deformation due to the passage of time and external conditions, and may lead to large-scale landslides; The selected number of the key layers includes 1-5 layers.

9. The gabion reinforcement system for preventing the damage of the open pit backfill dump according to claim 1 is characterized in that: The backfill bulk material is collected from the mine to be mined, including the abandoned ore body and mined soil in the mine to be mined; The abandoned ore bodies and mined soil in the mining area to be mined include but are not limited to fine sand excavated during mining or excavation in the mining area, and crushed rock and slag extracted during the mining process.

10. The gabion reinforcement system for preventing the damage of the open pit backfill dump according to claim 1 is characterized in that: The inclinometer tube forms a PVC pipe with multiple sections of inclinometer tubes through an inclinometer tube connecting sleeve, extends from the side of the gabion biner mesh to the ground surface, and covers the opening of the inclinometer tube on the ground surface to obtain monitoring data of soil displacement through inclinometer measurement.

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