A device for efficiently discharging filling water in a sublevel open stope subsequent filling

Abstract

This utility model relates to the field of mining equipment technology, and specifically discloses a device for efficiently draining filling water from a segmented goaf after backfilling. It includes segmented roadways, a drilling and exploration roadway adjacent to the segmented roadways, a backfilling return airway connected to the drilling and exploration roadway, an ore body boundary line (which defines the spatial scope of the goaf), a backfilling retaining wall located inside the drilling and exploration roadway, drainage holes on the backfilling retaining wall, and backfilling water guide holes located in the surrounding rock of the goaf, penetrating the surrounding rock and connecting to the goaf. The backfilling water guide holes are spaced along the height of the goaf. This device enables continuous drainage from the goaf, thereby accelerating the dewatering of the backfill slurry, shortening the solidification cycle of the backfill, and improving the production efficiency of the stope, solving the problems of low dewatering efficiency, long solidification cycle, and low early strength in current backfilling technology.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment technology, and in particular to a device for efficiently draining filling water from a segmented open stope followed by filling. Background Technology

[0002] Goaf backfill water refers to the free water contained in the backfill slurry that needs to be drained during the backfilling operation of the goaf. During the goaf backfilling process, after the backfill slurry is transported to the goaf through the backfilling pipeline, the solid particles in the slurry will gradually settle, while the water will exist in the goaf in a free state. If this water cannot be drained in time, it will lead to slow dehydration of the backfill slurry, prolonged solidification period of the backfill body, and reduced early strength, thus affecting the production efficiency of the mining area.

[0003] However, while existing technologies have considered improving the drainage efficiency of backfill water in goaf areas, such as by increasing the hydrostatic pressure difference and expanding the water-meeting area at the outlet, they have neglected the impact of the settling of tailings particles and cementitious materials in the backfill slurry on the drainage of backfill water. When the tailings and cementitious materials in the backfill slurry settle and submerge the outlet, the drainage efficiency of the outlet will be greatly reduced, and the drainage volume will gradually approach zero as the submerged height increases. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a device for efficiently draining backfill water from segmented open-cut mining areas after subsequent backfilling. This solves the technical problem that while existing technologies improve the drainage efficiency of backfill water in goaf areas by increasing the hydrostatic pressure difference and expanding the catchment area of ​​the water outlet, they neglect the impact of the settling of tailings particles and cementitious materials in the backfill slurry on drainage. As a result, after these two materials settle and submerge the water outlet, the drainage efficiency of the water outlet decreases significantly, and the drainage volume gradually approaches zero as the submersion height increases.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A device for efficiently draining backfill water from a segmented open stope followed by backfilling, comprising: Segmented tunnels; A rock drilling and prospecting tunnel, wherein the rock drilling and prospecting tunnel is arranged adjacent to the segmented tunnel; The filling return airway is connected to the rock drilling and exploration roadway. The ore body boundary line is a boundary marker that defines the spatial range of the goaf, and the goaf is located within the area enclosed by the ore body boundary line. A filling retaining wall is installed inside a rock drilling and exploration roadway. The filling retaining wall has drainage holes and is pre-embedded with anchor rods and formed by concrete pouring. Water filling guide holes are formed in the surrounding rock of the goaf, penetrate the surrounding rock and communicate with the goaf, and the water filling guide holes are distributed at intervals along the height of the goaf; The filter device includes a PVC pipe with a diameter slightly larger than the water filling hole, an axial slit with an arc length slightly smaller than the hole circumference, one end wrapped with geotextile and grid, and the other end coated with anchoring agent and inserted into the water filling hole. The filling pipeline extends from the segmented roadway through the rock drilling exploration roadway and the filling return airway to the top of the goaf, solving the problems of low dehydration efficiency, long solidification period and low early strength of traditional technology.

[0006] Preferably, the filling retaining wall is located in a flat section of the rock drilling and exploration roadway with good lithology, and is set close to the segmented roadway to improve the sealing performance and initial drainage effect of the retaining wall.

[0007] Preferably, the water-filling guide hole is constructed using a medium-deep hole drilling rig or a guide rail type disc drilling rig. The drilling angle is determined based on the maximum inclination angle of the drilling rig, and the distance between the guide hole and the roof of the drilling and exploration roadway is greater than twice the borehole diameter, thereby improving the reliability and durability of the drainage channel.

[0008] Preferably, the slit in the PVC pipe is formed by cutting along the axial direction with a cutting machine, so that the arc length of the PVC pipe is slightly smaller than the circumference of the water filling guide hole, to prevent leakage of the filling slurry and ensure smooth drainage.

[0009] Preferably, the number of layers of the geotextile is selected according to the cementitious material and the particle size of the tailings. More layers are used when the particle size is fine, and fewer layers are used when the particle size is coarser, to ensure the strength of the filling body and improve the adaptability of the filtration device.

[0010] Compared with the prior art, the present invention has the following beneficial effects: The aforementioned method for draining backfill water from goaf areas involves drilling multiple backfill water guide holes in the goaf to drain the backfill water into the drilling and exploration roadways. This increases the drainage channels for the backfill water, and the guide holes are distributed at different heights. This effectively reduces the impact of tailings and cementitious materials settling in the backfill slurry and the significant reduction in drainage efficiency at a single outlet point after they have submerged the outlet point. This allows for continuous drainage of backfill water from the goaf, accelerates the dewatering of the backfill slurry, shortens the solidification cycle of the backfill body, improves the production efficiency of the stope, and solves the problems of low dewatering efficiency, long solidification cycle, and low early strength of the backfill body in current backfilling technologies. Attached Figure Description

[0011] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0012] Figure 1 This is the front view of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a diagram showing the layout of the uppermost layer structure of the mining area at the same stage of this utility model. Figure 4 This is a diagram showing the layout of the lower layers of the mining area in the same stage of this utility model.

[0013] Legend: 1. Segmented roadway; 2. Rock drilling exploration roadway; 3. Backfilled return airway; 4. Ore body boundary line; 5. Backfilled retaining wall; 6. Backfilled retaining wall drainage hole; 7. Backfilled water guide hole. Detailed Implementation

[0014] This application provides a device for efficiently draining backfill water from segmented goaf subsequent backfilling stopes. It effectively solves the problem that while existing technologies improve backfill water drainage efficiency by increasing hydrostatic pressure difference and expanding the catchment area of ​​the water outlet, they neglect the impact of tailings particles and cementitious materials settling on drainage. This results in a significant decrease in drainage efficiency at the water outlet after these materials settle and submerge, with the drainage volume gradually approaching zero as the submersion height increases. This method for efficiently draining backfill water from segmented goaf subsequent backfilling stopes involves drilling multiple backfill water guide holes at different heights in the goaf and draining the water into the drilling and exploration roadway. This increases drainage channels, reducing the impact of tailings and cementitious materials settling and submerging the water outlet, achieving continuous drainage of the goaf. This accelerates backfill slurry dewatering, shortens the backfill solidification cycle, and improves stope production efficiency, solving the problems of low dewatering efficiency, long solidification cycle, and low early strength in current backfilling technologies. Example

[0015] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the technical solution in this application effectively solves the technical problem that although existing technologies improve the drainage efficiency of backfill water in goaf areas by increasing the hydrostatic pressure difference and expanding the catchment area of ​​the outlet point, they neglect the impact of the settling of tailings particles and cementitious materials in the backfill slurry on drainage. This results in a significant decrease in drainage efficiency at the outlet point after the settling of these materials submerges the outlet point, and the drainage volume gradually approaches zero as the submersion height increases. The overall idea is as follows: A device for efficiently draining backfill water from a segmented goaf subsequent backfilling stope, comprising: Sectional tunnel 1; Rock drilling and prospecting roadway 2 is set up adjacent to segment roadway 1; Fill the return airway 3, which is connected to the rock drilling and prospecting roadway 2; Ore body boundary line 4 is a boundary marker that defines the spatial range of the goaf. The goaf is located within the area enclosed by ore body boundary line 4. A filling retaining wall 5 is installed inside the rock drilling and exploration roadway 2. A filling retaining wall drainage hole 6 is provided on the filling retaining wall 5. Anchor rods are pre-embedded in the filling retaining wall 5 and it is formed by concrete pouring. Water filling guide hole 7 is opened in the surrounding rock of the goaf, penetrates the surrounding rock and connects with the goaf, and the water filling guide hole 7 is distributed at intervals along the height of the goaf; The filter device includes a PVC pipe with a diameter slightly larger than the water filling guide hole 7. It has an axial slit with an arc length slightly smaller than the circumference of the hole. One end is wrapped with geotextile and grid, and the other end is coated with anchoring agent and then inserted into the water filling guide hole 7. The filling pipeline extends from the segmented roadway 1 through the rock drilling and exploration roadway 2 and the filling return airway 3 to the top of the goaf. Through the coordination of various structures, a complete "filling-drainage" system is formed. Multiple filling water guide holes 7 at different heights increase the drainage channels. Combined with the filtration device to prevent clogging, the filling water in the goaf is continuously and efficiently discharged, which accelerates the dewatering of the filling slurry, shortens the solidification cycle of the filling body, improves the production efficiency of the mining area, and solves the problems of low dewatering efficiency, long solidification cycle and low early strength of traditional technology.

[0016] The filling retaining wall 5 is located in a flat section with good lithology in the rock drilling and exploration roadway 2, and is set close to the segment roadway 1. This ensures that the filling retaining wall 5 has a stable structure and strong bearing capacity, can effectively withstand the lateral pressure of the filling slurry, and facilitates the filling of the rock drilling and exploration roadway, thereby improving the sealing performance and initial drainage effect of the retaining wall.

[0017] The water-filling guide hole 7 is constructed using a medium-deep hole drilling rig or a guide rail disc drilling rig. The drilling angle is determined based on the maximum inclination angle of the drilling rig, and the distance between the guide hole and the roof of the drilling and exploration roadway 2 is greater than twice the borehole diameter. This ensures that the construction of the water-filling guide hole 7 is precise and safe, avoids damage to the roadway roof structure, ensures effective connection between the guide hole and the goaf, and improves the reliability and durability of the drainage channel.

[0018] The PVC pipe is cut along the axial direction by a cutting machine, so that the arc length of the PVC pipe is slightly smaller than the circumference of the water filling guide hole 7. This ensures that the PVC pipe cut is uniform and standardized, fits tightly with the inner wall of the water filling guide hole, enhances the fixing effect of the anchoring agent, prevents leakage of the filling slurry, and ensures smooth drainage.

[0019] The number of geotextile layers is selected based on the particle size of the cementitious material and tailings. Multiple layers are used when the particle size is fine, and fewer layers are used when the particle size is coarser. This allows for targeted filtration of filling slurry with different particle sizes, ensuring efficient filtration of filling water, reducing the loss of tailings and cementitious materials, ensuring the strength of the filling body, and improving the adaptability of the filtration device.

[0020] To address the problems existing in the prior art, this utility model provides a device for efficiently draining backfill water from segmented goaf subsequent backfilling stopes. This method for efficiently draining backfill water from segmented goaf subsequent backfilling stopes involves drilling multiple backfill water guide holes at different heights in the goaf area and draining the water to the rock drilling and exploration roadway. This increases the drainage channels and reduces the impact of tailings and cementitious materials settling and submerging the water outlet point in the backfill slurry, thereby achieving continuous drainage of the goaf area. This accelerates the dewatering of the backfill slurry, shortens the solidification cycle of the backfill body, and improves the production efficiency of the stope, solving the problems of low dewatering efficiency, long solidification cycle, and low early strength in current backfilling technology.

[0021] Working principle: The first step is to construct backfill retaining walls 5 in each segment of the rock drilling and exploration roadway 2. Based on the mining parameters, the vertical spacing of each backfill water guide hole 7 is scientifically set. The vertical spacing between each guide hole and the contact end of the goaf is determined by the spacing of the segment roadways 1, the volume and shape of the goaf, the groundwater seepage, and the production capacity of the backfill slurry. By using a medium-deep hole drilling rig or a guide rail disc drilling rig, the drilling angle is determined according to the maximum drilling inclination angle of the equipment, so that the guide hole can accurately penetrate the surrounding rock of the goaf and connect with the goaf. The distance between the guide hole and the roof of the rock drilling and exploration roadway 2 is greater than twice the drilling diameter to avoid damage to the roadway roof structure during the drilling process, and at the same time reserve operating space for the subsequent installation of the filtration device. The second step involves using a PVC pipe with a diameter slightly larger than that of the guide hole. An axial cut is made so that the arc length of the pipe is slightly smaller than the circumference of the guide hole, ensuring that the PVC pipe fits tightly against the inner wall of the guide hole. One end of the PVC pipe is wrapped with geotextile and a grid to filter solid particles in the slurry, allowing only water to pass through. After applying an anchoring agent to the pipe wall, it is inserted into the guide hole to fix the position of the PVC pipe and enhance the sealing, preventing the slurry from leaking out from the gap between the pipe and the hole. The third step involves transporting the filling slurry from the uppermost segmented roadway 1 through the rock drilling and exploration roadway 2 and the filling return airway 3 to the top of the goaf. The slurry fills the goaf from top to bottom. After the slurry is injected, the water in it seeps downwards under the action of gravity and is initially discharged through the drainage holes 6 of the filling retaining wall. As the height of the slurry rises, the lower filling water guide holes 7 begin to drain water. When the slurry submerges the lower guide holes, the upper guide holes take over the drainage, forming a dynamic relay drainage.

[0022] The entire system solves the problems of low drainage efficiency and long solidification cycle in traditional technologies by using initial drainage through retaining walls, continuous drainage through layered guide holes, anti-clogging filtration devices, and coordinated filling and drainage, ultimately improving the production efficiency of the mining area.

[0023] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A device for efficiently draining filling water from a segmented open area followed by filling, characterized in that, include: Segmented tunnel (1); A rock drilling and prospecting tunnel (2) is provided adjacent to a segmented tunnel (1); The return airway (3) is filled and connected to the rock drilling and exploration roadway (2); The ore body boundary line (4) is a boundary marker that defines the spatial range of the goaf area, and the goaf area is located within the area surrounded by the ore body boundary line (4). A filling retaining wall (5) is set inside the rock drilling and exploration roadway (2). A filling retaining wall drainage hole (6) is provided on the filling retaining wall (5). Anchor rods are pre-embedded in the filling retaining wall (5) and formed by concrete pouring. Water filling guide holes (7) are opened in the surrounding rock of the goaf, penetrate the surrounding rock and communicate with the goaf, and the water filling guide holes (7) are distributed at intervals along the height of the goaf; The filter device includes a PVC pipe with a diameter larger than the filling water guide hole (7), an axial slit with an arc length smaller than the hole circumference, one end wrapped with geotextile and grid, and the other end coated with anchoring agent and inserted into the filling water guide hole (7); The filling pipeline extends from the segmented roadway (1) through the rock drilling exploration roadway (2) and the filling return airway (3) to the top of the goaf.

2. The device for efficiently draining filling water from a segmented open area followed by filling, as described in claim 1, is characterized in that... The filling retaining wall (5) is located in the flat section of the rock drilling and exploration roadway (2) and is set close to the segment roadway (1).

3. The device for efficiently draining filling water from a segmented open area followed by filling, as described in claim 1, is characterized in that... The water-filling guide hole (7) is constructed by a medium-deep hole drilling rig or a guide rail disc drilling rig. The drilling angle is determined according to the maximum inclination angle of the drilling rig, and the distance between the guide hole and the top plate of the drilling and exploration roadway (2) is greater than twice the borehole diameter.

4. The device for efficiently draining filling water from a segmented open area followed by filling, as described in claim 1, is characterized in that... The slit in the PVC pipe is formed by cutting along the axial direction with a cutting machine, so that the arc length of the PVC pipe is less than the circumference of the water filling guide hole (7).

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