Roadside drilling drainage method for mine inclined roadway construction

Abstract

The invention discloses a mine inclined roadway construction roadside drilling drainage and drainage method, relates to the technical field of mine underground drainage construction, and solves the technical problem that drainage and tunneling interfere with each other when a mine in the prior art is excavated in downhill construction. The direction of the drainage drill holes is parallel to the tunneling direction of the roadway; b, after the drainage drill holes are drilled, the drainage drill holes are washed, then a steel pipe is adopted as a hole wall protection wall, and a plurality of water permeable holes are formed in the wall of the steel pipe; c, a drainage hole is constructed in the driving face to be communicated with the drainage drill hole, and the axis of the drainage hole intersects with the edge of the bottom end of the roadway; and d, sinking a submersible pump in the steel pipe protector, and discharging the mine water in the steel pipe through a drainage pipe. Therefore, through the arrangement of the drainage drill holes and the drainage holes, the drainage work and the tunneling work do not interfere with each other through the mine inclined roadway construction roadside drilling drainage method provided by the invention.

Description

Technical Field

[0001] The invention relates to the technical field of underground drainage construction in mines, and more specifically to a method for draining water by drilling holes beside inclined tunnels in mines. Background Art

[0002] Coal mines are a dynamic equilibrium, and the relative balance of "coal development, coal preparation, and coal recovery" is one of the foundations of coal mine safety. Coal mines are constantly arranging new mining areas or pan areas, making downhill excavation construction an inevitable situation.

[0003] When the mine is constructing the excavation working face downward, the most commonly used drainage method is direct drainage, that is, using a submersible electric pump or a pneumatic pump to directly drain the water from the excavation working face to a temporary water pit. However, direct drainage interferes with the main process of excavation, is time-consuming, and affects excavation efficiency. Summary of the invention

[0004] The invention provides a method for draining water by drilling holes beside an inclined tunnel in a mine, which is used to solve the technical problem in the prior art that drainage and excavation interfere with each other during downhill construction and excavation in the mine.

[0005] The present invention is achieved through the following technical solutions:

[0006] A method for drilling holes and draining water beside an inclined tunnel in a mine, comprising the following steps:

[0007] a: Drill drainage holes beside the inclined tunnel under construction, with the drainage holes being parallel to the tunneling direction of the tunnel;

[0008] b: After the drainage drilling is completed, the drainage drilling is carried out, and then a steel pipe is used as the hole wall protection, and multiple water-permeable holes are opened in the steel pipe wall;

[0009] c: A drainage hole is constructed on the excavation working face and connected to the drainage borehole, and the axis of the drainage hole intersects with the edge of the bottom of the tunnel;

[0010] d: Place a submersible pump inside the steel pipe protection and drain the mine water from the steel pipe through the drain pipe.

[0011] Furthermore, the drainage borehole has a plurality of hole sections, two adjacent hole sections are respectively located on both sides of the tunnel, and there is an overlapping portion between the two adjacent hole sections.

[0012] Furthermore, the drainage drilling holes are located between 500mm-1500mm below the tunnel floor and between 500mm-1500mm from the tunnel side edge.

[0013] Furthermore, the drainage holes are drilled using a high-torque tunnel drilling rig and the holes are drilled in two steps, the first time using a φ200mm drill bit and the second time using a φ320mm drill bit to expand the hole.

[0014] Furthermore, the plurality of water-permeable holes are arranged in a crisscross pattern, and the diameter of the water-permeable holes is 20 mm, and the distance between two adjacent water-permeable holes is 94 mm.

[0015] Furthermore, the diameter of the drain hole is 42 mm.

[0016] Furthermore, the steel pipe is coated with a filter layer.

[0017] Furthermore, the filter layer is a geotextile.

[0018] Furthermore, the submersible pump is a built-in submersible pump for mining.

[0019] Furthermore, the submersible pump drainage pipe is a flame-retardant PE coil for mining.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention provides a method for draining water by drilling holes beside a mine tunnel, and the method comprises the following steps: a: drilling drainage holes beside a construction inclined tunnel, wherein the direction of the drainage holes is parallel to the tunneling direction; b: drilling drainage holes for washing drainage holes after the completion of the drilling of drainage holes, and then using steel pipes as hole wall protection, and opening a plurality of water-permeable holes in the steel pipe wall; c: constructing drainage holes on the tunneling working face to be connected with the drainage holes, and the axis of the drainage holes intersects with the edge of the tunnel bottom; d: sinking a submersible pump in the steel pipe protection, and draining the mine water in the steel pipe through a drainage pipe.

[0022] By the above method, when downhill excavation is carried out, a drainage borehole parallel to the loosening circle beside the inclined tunnel is drilled, and a drainage hole connecting the excavation working face and the drainage borehole is drilled, so that the fissure water in the aquifer in the mountain body and the water dripping from the excavation working face are concentratedly drained into the drainage borehole through the loosening circle fissures and the drainage holes to form a precipitation funnel, thereby lowering the water level of the working face, and then the water in the drainage borehole is discharged by a submersible pump. In this way, by setting the drainage borehole and the drainage hole, drainage and excavation work can be carried out simultaneously. Therefore, the drainage method for drilling holes beside the inclined tunnel construction in a mine provided by the present invention can ensure that drainage and excavation work do not interfere with each other, thereby improving the efficiency of downhill construction excavation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0024] Figure 1 A schematic diagram of a method for drilling holes and draining water beside an inclined tunnel in a mine provided by the present invention;

[0025] Figure 2 Another schematic diagram of the method for drilling holes and draining water beside a mine inclined tunnel provided by the present invention;

[0026] Figure 3 Another schematic diagram of the method for drilling holes beside inclined tunnels in mines provided by the present invention for drainage.

[0027] Marks and corresponding parts names in the attached drawings:

[0028] 1-tunnel, 2-drainage drilling hole, 3-drainage hole, 4-drilling site. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0030] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to the other component.

[0031] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] Example

[0034] The present invention provides a method for drainage by drilling holes beside inclined tunnels in a mine, which is used to solve the technical problem of interference between drainage and tunneling in the prior art when digging downhill in a mine. The method for drainage by drilling holes beside a mine tunnel comprises the following steps:

[0035] a: Drill drainage borehole 2 beside the inclined tunnel 1 under construction. The direction of drainage borehole 2 is parallel to the excavation direction of tunnel 1, that is, the inclination angle of drainage borehole and tunnel is consistent to avoid intersection of drainage borehole 2 and tunnel 1, reduce construction risks and ensure construction safety.

[0036] b: After drilling the drainage borehole 2, the drainage borehole 2 is washed, and then a steel pipe is used as a hole wall protection, and a plurality of water-permeable holes are opened in the steel pipe wall. The residue in the drainage borehole 2 is discharged by washing the hole, which makes it easier to install the steel pipe in the drainage borehole 2. The steel pipe is used as a hole wall protection to enhance the stability of the hole wall of the drainage borehole 2, and prevent the drainage borehole 2 from collapsing and causing the drainage borehole 2 to be blocked. The setting of multiple water-permeable holes facilitates the mine water to enter the steel pipe;

[0037] c: A drainage hole 3 is constructed on the excavation working face and connected with the drainage borehole 2, and the axis of the drainage hole 3 intersects with the edge of the bottom end of the tunnel 1, that is, the drainage hole 3 is inclined, that is, there is an angle α between the axis of the drainage hole 3 and the axis of the drainage borehole 2, and the value range of the angle α is: 20°≤α≤70°. If the degree of the angle α is too small, it is difficult to implement the drainage hole 3; if the angle is too large, the drainage hole 3 needs to be drilled frequently, which will not only increase the work intensity of the staff, but also prolong the construction time and reduce the excavation efficiency. For example, the angle α can be 20°, 30°, 40°, 50°, 60° and 70°, etc., and the excavation working face and the drainage borehole 2 are connected by the drainage hole, so that the fissure water in the aquifer in the mountain and the water dripping from the excavation working face can be effectively discharged to the drainage borehole 2, thereby lowering the water level and improving the drainage efficiency.

[0038] When the excavation reaches the point where the drainage hole 3 is at the bottom of the excavation working face, that is, when the excavation reaches the point where the axis of the drainage hole 3 is in contact with the edge of the bottom end of the tunnel 1, the excavation is stopped, and the drainage hole 3 is drilled again at the excavation working face and connected to the drainage borehole 2, and then the excavation is continued, and the cycle is repeated until the excavation is completed.

[0039] Optionally, the drain hole 3 is synchronously arranged through a pneumatic hammer to connect the drainage drilling hole 2. The pneumatic hammer has the advantages of high efficiency, simple operation, light weight, good economic effect and fast footage speed.

[0040] Optionally, the diameter of the drain hole 3 is 42 mm.

[0041] d: A submersible pump is sunk inside the steel pipe protection, and the mine water in the steel pipe is discharged through the drainage pipe. The submersible pump is provided to facilitate the discharge of the mine water in the drainage borehole 2.

[0042] By the above method, when downhill excavation is carried out, a drainage borehole 2 parallel to the inclined tunnel 1 is drilled in the loosening circle beside the inclined tunnel 1, and a drainage hole 3 connecting the excavation working face and the drainage borehole 2 is drilled, so that the fissure water in the aquifer in the mountain and the water dripping from the excavation working face are concentratedly drained into the drainage borehole 2 through the loosening circle fissures and the drainage hole 3 to form a precipitation funnel, thereby lowering the water level of the working face, and then the water in the drainage borehole 2 is discharged by a submersible pump. In this way, by setting the drainage borehole 2 and the drainage hole 3, drainage and excavation work can be carried out simultaneously. Therefore, the drainage method for drilling holes beside the inclined tunnel construction in a mine provided by the present invention can ensure that drainage and excavation work do not interfere with each other, thereby improving the efficiency of downhill construction excavation.

[0043] An optional implementation of the present embodiment is as follows: the drainage drill hole 2 has multiple hole segments, and two adjacent hole segments are respectively located on both sides of the tunnel 1, and there is an overlapping part between the two adjacent hole segments. By arranging that the two adjacent hole segments are respectively located on both sides of the tunnel 1, it is more convenient to drill the drainage drill hole 2 again beside the tunnel 1, and the setting of the overlapping part avoids the connection between the adjacent two ends having a part that is not drained.

[0044] Optionally, the drainage borehole 2 is set to have x hole sections, and the x hole sections are set in sequence along the excavation direction: the 1st hole section, the 2nd hole section, ..., the i-th hole section, ..., the x-th hole section, and a drilling site 4 with a length, width and height of 5m, 3.5m and 2.8m respectively is provided at one end of the i-th hole section near the (i-2)th hole section. In this way, the setting of the drilling site 4 makes it easier to drill the drainage borehole 2.

[0045] An optional implementation of the present embodiment is as follows: the position of the drainage drill hole 2 is between 500mm-1500mm below the bottom plate of the tunnel 1, between 500mm-1500mm at the side edge of the tunnel 1, between 500mm-1500mm below the bottom wall of the tunnel 1, and between 500mm-1500mm at the edge of the tunnel 1 as the loosening circle range of the tunnel 1. By setting the drainage drill hole 2 within the range of the loosening circle, it is convenient to drain the cracks in the loosening circle.

[0046] Optionally, the drainage drilling hole 2 is located 600 mm below the bottom plate of the tunnel 1 and 600 mm from the edge of the tunnel 1 .

[0047] An optional implementation of this embodiment is as follows: the drainage borehole 2 is drilled using a high-torque tunnel drilling rig, and the hole is formed in two steps, the first time a φ200mm drill bit is used for drilling, and the second time a φ320mm drill bit is used for enlarging the hole. Optionally, the drilling rig can be a ZDY4200S drilling rig. Specifically, the drilling is carried out in two steps, the first time conventional drilling is used for directional navigation for the subsequent enlarging drilling; the second time spiral drilling is used, and the drill bit uses a roller drill bit for enlarging the hole to achieve the purpose of a hole diameter of 320mm.

[0048] An optional implementation of the embodiment is as follows: multiple water permeable holes are arranged in a crisscross pattern, and the diameter of the water permeable holes is 20 mm, and the spacing between two adjacent water permeable holes is 94 mm. Through multiple water permeable holes arranged in a crisscross pattern, it is ensured that the fissure water in the aquifer in the mountain and the water from the excavation working face can enter the steel pipe.

[0049] An optional implementation of this embodiment is as follows: the steel pipe is coated with a filter layer, and the filter layer is provided to achieve the purpose of passing water but not sand, thereby reducing the probability of damage to the submersible pump.

[0050] Optionally, the filter layer is a geotextile, which has good water permeability. Due to its light material, it is easy to transport and easy to wrap around the steel pipe. At the same time, the geotextile is corrosion-resistant and can be used in soils with different pH values.

[0051] An optional implementation of this embodiment is as follows: the submersible pump is a built-in submersible pump for mining. The built-in submersible pump for mining can be used directly in water, is easy to install and maintain, and is small in size, light in weight, easy to transport, and highly corrosion-resistant.

[0052] An optional implementation of this embodiment is as follows: the submersible pump drainage pipe is a flame-retardant PE coil for mining, which has good pressure resistance and corrosion resistance and can be used stably for a long time under various environmental conditions.

[0053] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for drilling and draining water beside an inclined tunnel in a mine, characterized in that: The steps include: a: drilling a drainage borehole (2) beside the inclined tunnel (1) under construction, wherein the drainage borehole (2) is arranged in parallel with the excavation direction of the tunnel (1); b: After the drainage hole (2) is drilled, the flushing and drainage hole (2) is drilled, and then a steel pipe is used as the hole wall protection, and a plurality of water-permeable holes are opened in the steel pipe wall; c: constructing a drainage hole (3) on the excavation working face to communicate with the drainage borehole (2), and the axis of the drainage hole (3) intersects with the edge of the bottom end of the tunnel (1); d: Sink a submersible pump into the steel pipe protection and drain the mine water in the steel pipe through the drain pipe.

2. A method for draining water by drilling holes beside a mine inclined tunnel according to claim 1, characterized in that: The drainage borehole (2) has a plurality of hole sections, two adjacent hole sections are respectively located on two sides of the tunnel (1), and there is an overlapping portion between the two adjacent hole sections.

3. A method for draining water by drilling holes beside a mine inclined tunnel according to claim 2, characterized in that: The drainage drilling hole (2) is located between 500mm and 1500mm below the bottom plate of the tunnel (1) and between 500mm and 1500mm from the side edge of the tunnel (1).

4. A method for draining water by drilling holes beside a mine inclined tunnel according to claim 3, characterized in that: The drainage borehole (2) is drilled by a high-torque tunnel drill and is drilled in two steps: the first time a φ200 mm drill is used for drilling, and the second time a φ320 mm drill is used for enlarging the hole.

5. A method for draining water by drilling holes beside a mine inclined tunnel according to claim 1, characterized in that: The plurality of water-permeable holes are arranged in a crisscross pattern, and the diameter of the water-permeable holes is 20 mm, and the distance between two adjacent water-permeable holes is 94 mm.

6. A method for draining water by drilling holes beside a mine inclined tunnel according to claim 1, characterized in that: The diameter of the drain hole (3) is 42 mm.

7. A method for draining water by drilling holes beside an inclined tunnel in a mine according to claim 1, characterized in that: The steel pipe is coated with a filter layer.

8. A method for draining water by drilling holes beside an inclined tunnel in a mine according to claim 7, characterized in that: The filter layer is geotextile.

9. A method for draining water by drilling holes beside a mine inclined tunnel according to claim 1, characterized in that: The submersible pump is a built-in submersible pump for mining.

10. A method for draining water by drilling holes beside a mine inclined tunnel according to claim 1, characterized in that: The drainage pipe is a flame-retardant PE coil for mining.

Images