New disaster-resistant drainage water tank structure in coal mines

Abstract

The utility model relates to a novel disaster-resistant drainage sump structure in a coal mine, which belongs to the technical field of coal mine drainage. Specifically, it comprises a disaster-resistant drainage liaison tunnel arranged between a transport tunnel and a return air tunnel, a water collecting sump arranged in the disaster-resistant drainage liaison tunnel, a drainage pump arranged in the water collecting sump, the drainage pump being connected to the ground through a pipeline, a water retaining dam being arranged at the bottom of a return air shaft of the return air tunnel, a water outlet being opened on one side of the water retaining dam, the water outlet being connected to the water collecting sump through a first drainage ditch, a second drainage ditch being arranged in the transport tunnel, a secondary sedimentation tank being arranged in the disaster-resistant drainage liaison tunnel, the second drainage ditch being connected to the water collecting sump through the secondary sedimentation tank, the utility model can solve the drainage problem of the return air shaft, and takes into account the drainage of the mining area, and is extremely practical.

Description

Technical Field

[0001] The utility model relates to a new type of disaster-resistant drainage water tank structure in a coal mine, belonging to the technical field of coal mine drainage. Background Art

[0002] At present, when a water inrush accident occurs in a mine, a large amount of water accumulates in the mining area and cannot be discharged. At the same time, there is water sprinkling in the mine's return air shaft. Especially in the rainy season, a large amount of water accumulates at the bottom of the shaft through the surface in the form of shaft sprinkling. Considering that the return air shaft is the main return air shaft, electrical equipment cannot be arranged, resulting in the water entering the return air shaft cannot be discharged in time. Therefore, there is an urgent need for a water tank structure that can quickly realize disaster-resistant drainage in coal mines. Utility Model Content

[0003] In order to solve the technical problems existing in the prior art, the utility model provides a new type of disaster-resistant drainage water tank structure in coal mines that can solve the drainage problem of the return air shaft and take into account the drainage of the mining area, and is extremely practical.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is a new type of disaster-resistant drainage sump structure in a coal mine, including a disaster-resistant drainage liaison lane arranged between the transport tunnel and the return air tunnel, a water collecting sump is arranged in the disaster-resistant drainage liaison lane, a drainage pump is arranged in the water collecting sump, the drainage pump is connected to the ground through a pipeline, a water dam is arranged at the bottom of the return air shaft of the return air tunnel, a water outlet is opened on one side of the water dam, the water outlet is connected to the water collecting sump through a first drainage ditch, a second drainage ditch is arranged in the transport tunnel, a secondary sedimentation tank is arranged in the disaster-resistant drainage liaison lane, the second drainage ditch is connected to the water collecting sump through the secondary sedimentation tank, a track is laid in the disaster-resistant drainage liaison lane, a full-section grille with an inspection door and an adjusting damper are also arranged in the disaster-resistant drainage liaison lane, the full-section grille is arranged at the front end of the secondary sedimentation tank, and the adjusting damper is arranged at one end close to the return air tunnel.

[0005] Preferably, the disaster-resistant drainage connection tunnel adopts an anchor-net-cable-spraying combined support structure.

[0006] Preferably, the water collection tank includes a water inlet inclined section, a sedimentation section, a sedimentation inclined section, a horizontal flow section and an outlet inclined section, the sedimentation section is the lowest point of the water collection tank, one end of the sedimentation section is connected to the water inlet inclined section, and the other end is connected to the sedimentation inclined section, the sedimentation inclined section is connected to the horizontal flow section, and one end of the horizontal flow section is provided with an outlet inclined section, the slope of the water inlet inclined section is equal to the slopes of the sedimentation inclined section and the outlet inclined section, and the slope surface length of the slope of the water inlet inclined section is respectively greater than the length of the sedimentation inclined section and the slope surface length of the outlet inclined section.

[0007] Compared with the prior art, the utility model has the following technical effects: the utility model can effectively solve the problem of mine drainage, and can be produced through a large number of mechanized equipment, with simple construction, short construction period and high safety factor. At the same time, it can reduce the labor intensity of employees and is conducive to connection arrangements. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of the utility model.

[0009] Figure 2 It is a structural schematic diagram of the water collecting tank in the utility model. DETAILED DESCRIPTION

[0010] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0011] like Figure 1 and Figure 2 As shown, a new type of disaster-resistant drainage sump structure in an underground coal mine comprises a disaster-resistant drainage liaison tunnel 3 arranged between a transport tunnel 1 and a return air tunnel 2, a water collecting sump 4 is arranged in the disaster-resistant drainage liaison tunnel 3, a drainage pump 5 is arranged in the water collecting sump 4, the drainage pump 5 is connected to the ground through a pipeline, a water retaining dam 17 is arranged at the bottom of the return air shaft of the return air tunnel 2, a water outlet is opened on one side of the water retaining dam 17, the water outlet is connected to the water collecting sump 4 through a first drainage ditch 6, a second drainage ditch 7 is arranged in the transport tunnel 1, a secondary sedimentation tank 8 is arranged in the disaster-resistant drainage liaison tunnel 3, the second drainage ditch 7 is connected to the water collecting sump 4 through the secondary sedimentation tank 8, a track 9 is laid in the disaster-resistant drainage liaison tunnel 3, a full-section grille 10 with an inspection door and an adjusting damper 11 are also arranged in the disaster-resistant drainage liaison tunnel 9, the full-section grille 10 is arranged at the front end of the secondary sedimentation tank 8, and the adjusting damper 11 is arranged at one end close to the return air tunnel 2.

[0012] Among them, the water collection tank 4 includes a water inlet inclined section 12, a sedimentation section 13, a sedimentation inclined section 14, a horizontal flow section 15 and an outlet inclined section 16. The sedimentation section 13 is the lowest point of the water collection tank 4. One end of the sedimentation section 13 is connected to the water inlet inclined section 12, and the other end is connected to the sedimentation inclined section 14. The sedimentation inclined section 14 is connected to the horizontal flow section 15. One end of the horizontal flow section 15 is provided with an outlet inclined section 16. The slope of the water inlet inclined section 12 is equal to the slopes of the sedimentation inclined section 14 and the outlet inclined section 16, and the slope surface length of the slope of the water inlet inclined section 12 is respectively greater than the length of the sedimentation inclined section 14 and the slope surface length of the outlet inclined section 16.

[0013] During the specific construction of the utility model, a disaster-resistant drainage connection tunnel is used to open from the transportation tunnel, and a machine excavation method is used to excavate 163m along the coal seam roof, and then continue to turn 90° to the south and excavate 165m to connect with the return air tunnel to form a tunnel system. In the disaster-resistant drainage connection tunnel, a full-section machine excavation is used to construct the inclined section of the water tank entrance. This section is a semi-coal rock tunnel with a length of 20.2m and a slope of 15°. Then the full-section machine excavation is used to construct the sedimentation space. This section is a semi-coal rock tunnel. One part is 5m long and has a slope of 0°; the other part is 7.7m long and has a slope of 15°. The full-section machine excavation is continued to construct the disaster-resistant drainage water tank. This section is a semi-coal rock tunnel with a length of 30m and a slope of 0°. Finally, the full-section machine excavation is used to construct the inclined section of the water tank outlet. The length is 8.5m and the slope is 15°.

[0014] The full-section grille with inspection door and the foundation of the regulating damper are constructed, among which: the top and bottom plates of the regulating damper are each grooved 300mm, the two sides are each grooved 500mm, and the groove width is 800mm; the top and bottom plates of the grille are each grooved 300mm, the two sides are each grooved 500mm, and the groove width is 600mm. The sedimentation tank and drainage ditch are constructed by artificial pneumatic pick excavation. There are two sedimentation tanks in total. The net size of a single sedimentation tank is length × width × depth = 4000 × 2000 × 2000mm. The side of the sedimentation tank is sprayed with concrete, with a thickness of 100mm, concrete grade C20, and the bottom plate is hardened with 200mm concrete, concrete grade C20. The net size of the ditch is length × width × depth = 200 × 200 × 200mm, and the surrounding of the ditch is hardened with concrete, with a thickness of 50mm, and concrete grade C20. Finally, the track system, water tank bottom plate hardening, drainage pipeline laying, etc. are laid.

[0015] In addition, the disaster-resistant drainage connection tunnel 3 adopts an anchor-net-cable-spraying combined support structure.

[0016] Specifically include:

[0017] (1) Anchor rods and accessories: The anchor rods for the side of the tunnel after the bottom is MSGLW-400 / 20×2000 left-handed non-longitudinal rib threaded steel anchor rod, the rod body material is HRB400, and the elongation is not less than 15%.

[0018] Anchor accessories: Strong anchor nuts are used, with high-strength support plate self-aligning ball pads and nylon washers. The support plate adopts high-strength arch support plate with specifications of 150×150×10mm and a bearing capacity of not less than 255kN. Anchor support parameters: Rectangular layout is adopted, and the row spacing is 1000mm. Each anchor uses one MSK2335 and one MSZ2360 resin anchor. The anchoring force of the top plate anchor is not less than 152kN, the preload torque is not less than 350N·m, and the anchoring force of the side anchor is not less than 125kN, and the preload torque is not less than 300N·m.

[0019] (2) Mesh: The metal mesh is a diamond-shaped metal mesh woven from 10# iron wire with a mesh size of 70×70mm. The mesh overlap should be no less than 100mm. The mesh is connected by two strands of 16# iron wire folded in half and twisted together, with the twist not less than three turns.

[0020] (3) Anchor cables and accessories: The anchor cable material of the rear roadway is φ22 steel strand, 5300 mm in length. The anchor cable is anchored with an extended length. When each anchor cable is installed, one MSK2335 and two MSZ2360 resin anchors are used at the end. The top plate requires the anchor cable to be pre-tightened to no less than 269 kN.

[0021] Anchor cable accessories: The support plate adopts a high-strength adjustable support plate with a specification of 300×300×16mm and a matching lock. The support plate has a bearing capacity of not less than 550kN. Anchor cable support parameters: rectangular arrangement, anchor cable spacing 2000mm.

[0022] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the scope of the present invention.

Claims

1. A new type of disaster-resistant drainage water tank structure in coal mines, characterized by: It comprises a disaster-resistant drainage liaison lane arranged between the transport lane and the return air lane, a water collection tank is arranged in the disaster-resistant drainage liaison lane, a drainage pump is arranged in the water collection tank, the drainage pump is connected to the ground through a pipe, a water retaining dam is arranged at the bottom of the return air shaft of the return air lane, a water outlet is opened on one side of the water retaining dam, the water outlet is connected to the water collection tank through a first drainage ditch, a second drainage ditch is arranged in the transport lane, a secondary sedimentation tank is arranged in the disaster-resistant drainage liaison lane, the second drainage ditch is connected to the water collection tank through the secondary sedimentation tank, a track is laid in the disaster-resistant drainage liaison lane, a full-section grille with an inspection door and an adjusting damper are also arranged in the disaster-resistant drainage liaison lane, the full-section grille is arranged at the front end of the secondary sedimentation tank, and the adjusting damper is arranged at one end close to the return air lane.

2. The novel disaster-resistant drainage water sump structure for underground coal mines according to claim 1 is characterized by: The disaster-resistant drainage connection tunnel adopts an anchor-net-cable-spraying combined support structure.

3. The novel disaster-resistant drainage water sump structure for underground coal mines according to claim 1 is characterized by: The water collection tank includes a water inlet inclined section, a sedimentation section, a sedimentation inclined section, a horizontal flow section and an outlet inclined section. The sedimentation section is the lowest point of the water collection tank. One end of the sedimentation section is connected to the water inlet inclined section, and the other end is connected to the sedimentation inclined section. The sedimentation inclined section is connected to the horizontal flow section. One end of the horizontal flow section is provided with an outlet inclined section. The slope of the water inlet inclined section is equal to the slopes of the sedimentation inclined section and the outlet inclined section, and the slope surface length of the slope of the water inlet inclined section is respectively greater than the length of the sedimentation inclined section and the slope surface length of the outlet inclined section.

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