A mine large-diameter borehole reverse well construction chamber structure for rock mass breaking
Patent Information
- Application Number
- CN202522446813.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-18
- Publication Date
- 2026-10-13
- Estimated Expiration
- 2035-11-18
AI Technical Summary
[0003]本实用新型的目的是提供一种岩体破碎的矿山大直径钻孔反井施工硐室结构，旨在解决上述背景技术中钻孔掘进用水泥浆液更换频繁，影响钻孔正常掘进、钻孔口部发生岩石冒落，造成钻孔报废、钻机掉进钻孔以及施工配电盘容易造成安全事故的问题
[0007]本实用新型的有益效果是：本实用新型中大钻孔孔口设置混凝土加固，确保孔口牢固可靠，防止钻孔扩孔时口部塌落，避免了钻孔报废；大钻孔口部两侧安装钢轨，防止大钻孔自下而上钻孔时造成钻机掉进钻孔；上部巷道顶部安装吊装锚杆，方便了钢轨和钻机的安装和移动；水泥搅拌池和水泥沉淀池配合除砂器，将水泥浆液经过处理后可重新打进大钻孔，达到长时间循环使用的效果，提高了钻孔施工效率；设置配电硐室，确保配电设施安全和钻孔施工作业安全。
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Figure CN224849876U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of metal mining technology, specifically relating to a chamber structure for large-diameter borehole reverse shaft construction in mines with fractured rock masses. Background Technology
[0002] Large-diameter boreholes in mines with fractured rock masses typically employ the raised shaft method. Raised shaft drilling utilizes existing roadways. Before drilling, a pit is excavated in the upper roadway floor to serve as a cement slurry mixing tank. During drilling, cement slurry is pumped into the borehole, and the slurry is then returned to the mixing tank for recycling. This cement slurry contains a high amount of rock powder and impurities, which can affect drill bit progress over time. Therefore, it must be replaced after a short period of use, requiring fresh cement slurry preparation, thus impacting normal borehole excavation. When enlarging the borehole from bottom to top with a large drill bit, if the rock at the borehole opening is fractured, it can collapse, causing a large-scale rockfall at the borehole opening and rendering the borehole unusable. Fractured rock at the borehole opening can also enlarge the opening, and the drilling rig may sometimes fall into the borehole, affecting its normal excavation. Furthermore, the haphazard placement of the electrical control panel on the roadway side increases the risk of accidents and hinders safe drilling operations. Utility Model Content
[0003] The purpose of this utility model is to provide a chamber structure for large-diameter borehole reverse shaft construction in mines with fractured rock mass, aiming to solve the problems in the above-mentioned background technology, such as frequent replacement of cement slurry for borehole excavation, which affects normal borehole excavation, rock collapse at the borehole opening causing borehole scrapping, drilling rig falling into the borehole, and construction power distribution panel easily causing safety accidents.
[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A large-diameter borehole reverse shaft construction chamber structure for mines with fractured rock masses includes a large borehole, a hoisting anchor bolt installed on the top of the upper roadway of the large borehole, concrete surrounding the borehole opening, steel rails on both sides of the borehole opening, a cement ditch connected to the borehole opening, a cement pool connected to the cement ditch, and a power distribution chamber located in the upper roadway of the large borehole.
[0005] Furthermore, the cement pool includes a cement mixing pool and a cement sedimentation pool. The cement ditch is connected in sequence to the cement sedimentation pool and the cement mixing pool. A concrete brick wall is provided between the cement mixing pool and the cement sedimentation pool, and a sand remover is installed on the concrete brick wall.
[0006] Furthermore, multiple fixed anchor rods are provided on the single rail, and multiple round steel connecting rods are connected between the two rails.
[0007] The beneficial effects of this utility model are as follows: The large borehole opening is reinforced with concrete to ensure its firmness and reliability, preventing collapse during borehole enlargement and avoiding borehole scrapping; steel rails are installed on both sides of the large borehole opening to prevent the drilling rig from falling into the borehole during bottom-up drilling; hoisting anchors are installed on the top of the upper roadway to facilitate the installation and movement of the steel rails and drilling rig; the cement mixing tank and cement sedimentation tank, combined with a sand remover, allow the treated cement slurry to be re-injected into the large borehole, achieving long-term recycling and improving drilling efficiency; and a power distribution chamber is provided to ensure the safety of power distribution facilities and drilling operations. Attached Figure Description
[0008] Figure 1 This is a structural plan view of the present utility model; Figure 2 This utility model Figure 1 Side view of the structure from the middle BB direction; Figure 3 This utility model Figure 1 Side view of the structure from the AA direction.
[0009] In the diagram, 1-cement mixing tank; 2-sand remover; 3-concrete brick wall; 4-cement sedimentation tank; 5-cement ditch; 6-steel rail; 7-fixed anchor bolt; 8-round steel connecting rod; 9-large borehole; 10-concrete; 11-electric distribution chamber; 12-lifting anchor bolt. Detailed Implementation
[0010] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.
[0011] like Figures 1 to 3 As shown, a large-diameter borehole reverse shaft construction chamber structure for mines with fractured rock mass includes a large borehole 9, with a hoisting anchor 12 installed on the top of the upper roadway of the large borehole 9, and concrete 10 surrounding the borehole opening. Steel rails 6 are provided on both sides of the opening of the large borehole 9, and a cement ditch 5 is connected to the opening of the large borehole 9. The cement ditch 5 is connected to a cement pool, and a power distribution chamber 11 is provided in the upper roadway of the large borehole 9.
[0012] Specifically, the cement pool includes a cement mixing pool 1 and a cement sedimentation pool 4. The cement ditch 5 is connected to the cement sedimentation pool 4 and the cement mixing pool 1 in sequence. A concrete brick wall 3 is provided between the cement mixing pool 1 and the cement sedimentation pool 4. A sand remover 2 is installed on the concrete brick wall 3.
[0013] Specifically, a single rail 6 is equipped with multiple fixed anchor rods 7, and multiple round steel connecting rods 8 connect the two rails 6 on both sides.
[0014] In practical applications, the existing upper and lower roadways for drilling large borehole 9 are selected based on the borehole design location. The upper roadway has a straight-walled semi-circular arch cross-section, with a width and height of no less than 5m. The roadway floor is reinforced with concrete with a thickness of 200mm. The purpose of the concrete reinforcement is to prevent the upper roadway floor from collapsing when large borehole 9 is expanded from bottom to top. Then, the opening of large borehole 9 is reinforced with concrete 10. The concrete 10 reinforcement is no less than 3m long, no less than 3m wide, and no less than 1.5m deep to prevent the opening of large borehole 9 from collapsing when large borehole 9 is expanded from bottom to top. Two steel rails 6 are laid on both sides of the opening of the large borehole 9 in the longitudinal direction of the upper roadway. The length of the steel rails 6 is not less than 10m, and the spacing between the steel rails 6 is 700mm. The steel rails 6 are fixed to the roadway floor by fixed anchor rods 7, which are set every 1m. The two steel rails 6 are welded together by round steel connecting rods 8. The diameter of the round steel connecting rods 8 is 10mm, and the spacing between the round steel connecting rods 8 is not less than 2m. When drilling and enlarging the large borehole 9, the drilling rig is fixedly placed on the two steel rails 6. The two steel rails 6 prevent the opening of the large borehole 9 from collapsing when enlarging the borehole from bottom to top, causing the drilling rig to fall into the large borehole 9. In the upper tunnel, a suitable location is selected to excavate a pool in the bottom slab of the tunnel sidewall. The pool is 4m long, 1m wide, and at least 1.2m deep. The pool is supported by concrete. A concrete brick wall 3 is built in the middle of the pool, dividing it into two parts. A sand separator 2 is installed at the location of the concrete brick wall 3. In front of the sand separator 2 is a cement sedimentation tank 4, and behind the sand separator 2 is a cement mixing tank 1. A cement trench 5 is excavated from the sidewall of the cement sedimentation tank 4 to the large borehole 9. The cement trench 5 has a square cross-section, with a height and width of 500mm. The cement ditch 5 is supported by concrete. The direction from the cement ditch 5 to the large borehole 9 is uphill, which facilitates the flow of cement slurry in the large borehole 9 back to the cement sedimentation tank 4. After sedimentation, the cement slurry passes through the desander 2 to remove rock debris and impurities before flowing back to the cement mixing tank 1. The cement slurry in the cement mixing tank 1 is pumped back into the large borehole 9 for lubrication during drilling. After filtration, the cement slurry can be recycled for about 20 days. After 20 days, the cement slurry is prepared again, and the original cement slurry is discharged into the abandoned roadway. Two sets of hoisting anchor bolts 12 are installed on the top of the large borehole 9 in the upper roadway, with a spacing of 4m between the two sets of hoisting anchor bolts 12. Electric hoists can be installed on the hoisting anchor bolts 12 to move and install the rails 6 and the drilling rig. A power distribution chamber 11 is set up at a suitable location in the upper roadway of the large borehole 9. The cross-sectional shape of the power distribution chamber 11 is a straight-walled semi-circular arch, 2m wide and 2m high. The power distribution chamber 11 is supported by shotcrete and anchor mesh to ensure the safety of the power distribution facilities and the drilling operation.
Claims
1. A chamber structure for large-diameter borehole raise shaft construction in mines with fractured rock masses, comprising a large borehole (9), characterized in that, The upper roadway of the large borehole (9) is equipped with a hoisting anchor rod (12), and concrete (10) is provided around the borehole opening. Steel rails (6) are provided on both sides of the opening of the large borehole (9). A cement ditch (5) is connected to the opening of the large borehole (9). A cement pool is connected to the cement ditch (5). A power distribution chamber (11) is provided in the upper roadway of the large borehole (9).
2. The structure of a large-diameter borehole raised shaft construction chamber for fractured rock masses in a mine, as described in claim 1, is characterized in that... The cement pool includes a cement mixing tank (1) and a cement sedimentation tank (4). The cement ditch (5) is connected to the cement sedimentation tank (4) and the cement mixing tank (1) in sequence. A concrete brick wall (3) is provided between the cement mixing tank (1) and the cement sedimentation tank (4). A sand remover (2) is provided on the concrete brick wall (3).
3. A chamber structure for large-diameter borehole reverse shaft construction in mines with fractured rock mass, as described in claim 1 or 2, characterized in that... Multiple fixed anchor rods (7) are provided on the single rail (6), and multiple round steel connecting rods (8) are connected between the two rails (6).