CN113982684B - Combined auxiliary roof connecting device and method for rapid closure of water passing tunnel - Google Patents
Combined auxiliary roof connecting device and method for rapid closure of water passing tunnel Download PDFInfo
- Publication number
- CN113982684B CN113982684B CN202111286292.6A CN202111286292A CN113982684B CN 113982684 B CN113982684 B CN 113982684B CN 202111286292 A CN202111286292 A CN 202111286292A CN 113982684 B CN113982684 B CN 113982684B
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- roadway
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 111
- 239000010959 steel Substances 0.000 claims abstract description 111
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 6
- 239000000725 suspension Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 5
- 239000003245 coal Substances 0.000 abstract description 4
- 230000001133 acceleration Effects 0.000 abstract 1
- 230000000903 blocking effect Effects 0.000 description 5
- 238000005065 mining Methods 0.000 description 4
- 238000011900 installation process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/103—Dams, e.g. for ventilation
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention relates to a combined auxiliary roof-connecting device and method for rapid interception of a water passing roadway. The aggregate interception grille is fixed on the section of the roadway and consists of a channel steel frame, a steel wire mesh, an anchor rod and an anchor cable; the roadway top auxiliary roof-connecting grille is hung on an upstream roadway roof and consists of a steel wire mesh, connecting steel bars, counterweight steel bars, anchor rods and anchor cables; the method for cooperative work of the two parts of the structure assists the aggregate to quickly connect the roof, and solves the technical problem that the aggregate pouring process is uncontrollable. The device has the advantages of simple structure, space saving, acceleration of the construction progress of the water-blocking wall construction engineering in the aggregate pouring stage, improvement of the stability of the stacking section, and key effect on rescue of water burst accidents of the coal mine.
Description
Technical Field
The invention belongs to the technical field of post-disaster treatment of coal mine water damage, and particularly relates to a combined auxiliary roof-connecting device and method for rapid closure of a water passing roadway.
Background
After the mine is flooded by water, the hydraulic connection between the water source and the mine is cut off by adopting a water-flowing interception method, so that the method is an important method for realizing rapid rescue and re-mining. The water-flowing intercepting process is to pour aggregate with different grain sizes from the ground in a water-flowing roadway, the aggregate moves in the roadway until the aggregate is stacked until the aggregate is propped up to form a water-blocking effect, and finally the roadway is thoroughly plugged by grouting reinforcement.
The water-flowing interception process has requirements on construction period and construction quality, and in the actual construction process, the accumulation condition of aggregate in a roadway is hidden and invisible, so that a large amount of ineffective pouring condition often exists, the aggregate is continuously flushed to the far end at the downstream, mine equipment is submerged, a roadway system is buried, later dredging is difficult, and secondary property loss is formed. In addition, the uncontrolled aggregate pouring process also leads to long construction period and high cost, and the aim of rapid interception and rescue of the mine can not be realized.
In order to reduce aggregate outflow, the general practice is to construct a temporary water-retaining wall in an emergency way at a high position at the downstream of a water-retaining wall construction section, and the method is characterized by longer construction period, difficult pressure resistance, easy bursting and incapability of ensuring the effect of controlling aggregate outflow.
Disclosure of Invention
Aiming at the technical problems, the invention provides a combined auxiliary roof-connecting device and method for quickly intercepting a water passing roadway, which are simple and convenient to install, can perform preparation work in daily water-controlling work, and can effectively solve the technical problems of uncontrollable aggregate pouring process and difficult roof connection.
In order to achieve the above object, the present invention is provided with:
a combination formula auxiliary roof-engaging device for crossing quick shutoff in tunnel includes:
an aggregate interception grille comprising: the interception grid steel wire netting is fixed on a roadway in a retractable manner through anchor cables and/or anchor rods and a frame;
an auxiliary roof-top grille comprising: a top-connected grid steel wire mesh, wherein the mesh diameter of the top-connected grid steel wire mesh is larger than that of the interception grid steel wire mesh; the top-connected grid steel wire meshes are multiple, and the top and the bottom of each top-connected grid steel wire mesh are respectively connected through connecting steel bars and counterweight steel bars; the top-connected grid steel wire mesh net can be retractable and fixed on the roadway roof through anchor cables and/or anchor rods.
Preferably, the combined auxiliary roof-connecting device for rapid interception of a water passing roadway comprises an aggregate interception grid, and the aggregate interception grid comprises: a frame; the frame is fixed on the tunnel top plate, the tunnel bottom plate and the tunnel side edges, and the interception grid steel wire mesh is fixed on the frame through anchor cables and/or anchor rods.
Preferably, the combined auxiliary roof grafting device for rapid interception of the water passing roadway comprises a plurality of steel wire meshes, wherein the top, the bottom and the side parts of a first interception grid steel wire mesh are respectively fixed on a roadway top plate, a roadway bottom plate and a roadway side wall in a retractable manner through anchor cables and/or anchor rods and frames; the tops of the rest top-connected grid steel wire meshes are fixed on the roadway roof through anchor cables and/or anchor rods, the sides and the bottoms of the top-connected grid steel wire meshes are in a natural suspension state, and the top-connected grid steel wire meshes are connected through counterweight steel bars at the bottoms so as to be synchronously retracted and released.
Preferably, in the combined auxiliary roof connecting device for rapid interception of a water passing roadway, the interception grid steel wire mesh and/or the roof connecting grid steel wire mesh are woven through steel strands, and all the steel strands are connected through buckles.
Preferably, in the combined auxiliary roof grafting device for rapid interception of a water passing roadway, the mesh diameter of the aggregate interception grid steel wire mesh is 5-10mm, and the mesh diameter of the roof auxiliary roof grafting grid steel wire mesh is 20-30mm.
A combined auxiliary roof grafting method for rapid closure of a water passing roadway, comprising:
installing an aggregate interception grid at the downstream of the to-be-built water-blocking wall section, wherein the aggregate interception grid comprises an interception grid steel wire mesh, and the interception grid steel wire mesh is retractably fixed on a roadway through anchor cables and/or anchor rods and a frame;
installing a roof auxiliary roof-engaging grid upstream of the aggregate-intercepting grid, the auxiliary roof-engaging grid comprising: a top-connected grid steel wire mesh, wherein the mesh diameter of the top-connected grid steel wire mesh is larger than that of the interception grid steel wire mesh; the top-connected grid steel wire meshes are multiple, and the top and the bottom of each top-connected grid steel wire mesh are respectively connected through connecting steel bars and counterweight steel bars; the top-connected grid steel wire mesh net can be retractable and fixed on the roadway roof through anchor cables and/or anchor rods;
after water burst, the interception grid wire mesh and/or the roof-grafting grid wire mesh are unfolded to intercept aggregate and/or roof.
Preferably, in the combined auxiliary roof grafting method for rapid interception of a water passing roadway, the distance between the bottom of the expanded roof grafting grid wire mesh and the roadway top plate is smaller than the distance between the bottom of the expanded interception grid wire mesh and the roadway top plate.
Preferably, in the combined auxiliary roof grafting method for rapid interception of the water passing tunnel, the roof grafting grid steel wire mesh is arranged in the range of 20-50 meters upstream of the interception grid steel wire mesh.
Compared with the prior art, the invention has the advantages that:
1) The invention has reliable technical principle, and adopts the combined device to cooperatively work so as to ensure the controllability of the aggregate pouring process. The aggregate interception grille plays a role in intercepting aggregates during normal pouring; under the action of gravity of the counterweight reinforcing steel bars, the auxiliary roof-connecting grid at the roadway top gradually sinks into the aggregate along with the progress of the stacking process, coarse aggregate is gradually embedded between meshes to form a skeleton effect, the anti-scouring capability of a stacking body at the top is increased, and the effect of rapid roof connection is achieved; the combined device is free of aggregate when water is passed, bears low dynamic water load, has reliable performance, and avoids the defect that the temporary water retaining wall is built and needs to bear pressure to have instability risk.
2) The invention has low cost, the used materials and accessories are common mining materials, the installation process is simple, 2-3 workers can complete the installation process rapidly by matching, the installation period can be completed in 1-2 days, the installation can be implemented during the tunneling construction period, and the problems of urgent time and difficult quality guarantee of establishing a temporary water retaining wall after water burst are avoided.
3) The steel wire mesh used by the combined device is woven by steel strands, has the characteristic of flexibility and foldability, is in a folded state during non-working, does not occupy a large amount of roadway space, and can be quickly unfolded after water burst to enter a working state.
Drawings
FIG. 1 is a schematic view of a longitudinal section of the device of the present invention
FIG. 2 is a schematic cross-sectional view of the device of the present invention
FIG. 3 is a schematic view of a wire mesh structure used in the present invention
FIG. 4 is a schematic view of the structure of the anchor rod or cable used in the present invention
Wherein: 1. anchor cable, channel steel frame, anchor rod, steel wire rope, top plate, bottom plate, connecting steel bar, weight steel bar, side wall, steel wire net, steel stranded wire, bayonet, horseshoe, nut, tray and drilling holes.
Detailed Description
The invention is further illustrated in the following examples in conjunction with the accompanying drawings:
analyzing hydrogeological conditions, researching a water passing path after water burst occurs during mining, determining the optimal roadway position for building the water blocking wall, selecting the sections with complete coal rock and no branch roadway on the roadway top plate, the roadway bottom plate and the roadway side walls as far as possible, and ensuring enough section length.
Referring to fig. 1, a schematic diagram of a combined auxiliary roof grafting device for rapid interception of a water tunnel according to an embodiment of the invention is shown. The aggregate blocking grille comprises 1 set of aggregate blocking grille and 5-10 sets of roadway top auxiliary roof-connecting grille, wherein the size of the aggregate blocking grille is matched with the size of the section of a roadway.
The combined auxiliary roof-connecting device consists of two parts, namely an aggregate interception grid and a roadway roof auxiliary roof-connecting grid. The aggregate interception grille is fixed on the roadway roof, the roadway bottom plate and the roadway side wall through the anchor cable, the anchor rod and the steel wire rope, and the roadway roof auxiliary roof-connecting grille is fixed on the roadway roof through the anchor cable and the anchor rod.
The materials and specifications of the custom assembly are as follows: (1) channel steels, 20a type or higher, are longer than the length, width and height of the roadway by 20-30cm, and are embedded into the inner wall of the roadway; (2) anchor rods and anchor ropes, anchor rods, anchor ropes, nuts and trays, wherein the length of the anchor rods is 1.5-2.5m, and the length of the anchor ropes is 4-6m; (3) the diameter of the steel wire rope is 8-10mm, the diameter of the connecting steel bar is 8-12mm, and the diameter of the counterweight steel bar is 20-30mm; (4) the steel wire mesh is customized, 8-12mm steel strands are adopted for weaving, bayonet connection is adopted, the size of the interception grid steel wire mesh is matched with that of the frame, the length of the top-connected grid steel wire mesh is slightly smaller than the lane width, and the height is 30cm.
The horizontal spacing between the top bottom plate of the fixed aggregate interception grille and the lateral inclined-pull anchor cable is 100cm, the vertical spacing between the anchor cable and the anchor rod is 60-70cm. The auxiliary roof-connecting grids are arranged in parallel, each group of auxiliary roof-connecting grids comprises 8 meshes, the meshes are spaced by 25cm, and the length of a roadway controlled by each group of meshes is about 2 m.
A combined auxiliary roof grafting method for rapid closure of a water passing roadway according to this embodiment will be described with reference to fig. 1 to 4. The method comprises the following steps:
1) Analyzing hydrogeological conditions, researching a water passing path after water burst occurs during mining, determining the optimal roadway position for building the water blocking wall, selecting the sections with complete coal rock and no branch roadway on the roadway top plate, the roadway bottom plate and the roadway side walls as far as possible, and ensuring enough section length.
2) The assembly of the combined auxiliary roof-connecting device customized on the ground comprises an aggregate interception grating 1 sleeve and a roadway roof auxiliary roof-connecting grating 5-10 sleeve, and the size of the assembly is matched with the size of the section of a roadway.
3) Installing an aggregate interception grid 1 sleeve at the downstream of a section of a to-be-built water-blocking wall, wherein the aggregate interception grid 1 sleeve is positioned on the same plane with the periphery of a roadway after being installed, and a cable-stayed steel wire rope is arranged at the water inlet end of the roadway; installing 5-10 sets of roadway top auxiliary roof-connecting grids within the range of 20-50m upstream of the aggregate interception grids; the steel wire mesh is in a folded state before water burst, and is rapidly unfolded to be in a working state after water burst.
The combined auxiliary roof grafting device in the step 2) consists of two parts, namely an aggregate interception grid and a roadway roof auxiliary roof grafting grid. The aggregate interception grille is fixed on the roadway top plate, the roadway bottom plate and the roadway side wall through anchor cables, anchor rods and steel wire ropes, and the roadway top auxiliary roof-connecting grille is fixed on the roadway top plate through the anchor cables and the anchor rods. The steel wire mesh of the two-part device is in a folded state before water burst, does not occupy the roadway space, and is rapidly unfolded and in a working state after water burst
The aggregate interception grille in the step 2) consists of a channel steel frame and a steel wire mesh, and the steel wire mesh is fixed through a reserved hook on the reserved channel steel frame.
The roadway top auxiliary roof-connecting grid in the step 2) consists of steel wire meshes, connecting steel bars and counterweight steel bars, wherein the steel wire meshes are arranged in parallel at 25cm intervals, the tops of the steel wire meshes are connected in series through 5-6 connecting steel bars, and the bottoms of the steel wire meshes are connected in series through 5-6 counterweight steel bars.
The channel steel frames in the steps 2) and 3) are formed by splicing 4 20a type channel steel, the length of the channel steel is 20-30cm larger than the size of a roadway, reserved hole sites are fixed through anchor cables or anchor rods, and the distance between the reserved hole sites is 60-70cm; the steel wire mesh is woven by adopting 8-12mm steel strands, the steel wire mesh is connected by bayonet, the mesh diameter of the aggregate interception grid steel wire mesh is 5-10mm, and the mesh diameter of the roadway top auxiliary top-connected grid steel wire mesh is 20-30mm; the length of the anchor rod is 1.5-2.5m, the diameter of the anchor rod is 18-20mm, and the interval row distance is 60-70cm; the length of the anchor cable is 4-6m, the diameter of the anchor cable is 20-30mm, and the interval row distance is 100cm; the diameter of the steel wire rope is 8-10mm, the diameter of the connecting steel bar is 8-12mm, and the diameter of the counterweight steel bar is 20-30mm.
The installation process can be completed before the working face is recovered, and components of the combined device except the anchor rod and the anchor cable can be disassembled and recycled after the working face is recovered.
Claims (8)
1. A combination formula auxiliary roof-connecting device for crossing quick shutoff in tunnel, its characterized in that includes:
an aggregate interception grille comprising: the interception grid steel wire netting is fixed on a roadway in a retractable manner through anchor cables (1) and/or anchor rods (3) and frames (2);
an auxiliary roof-top grille comprising: a top-connected grid steel wire mesh, wherein the mesh diameter of the top-connected grid steel wire mesh is larger than that of the interception grid steel wire mesh; the top-connected grid steel wire meshes are multiple, and the top and the bottom of each top-connected grid steel wire mesh are respectively connected through a connecting steel bar (7) and a counterweight steel bar (8); the roof-connected grid steel wire mesh net can be retracted and fixed on a roadway roof (5) through anchor cables (1) and/or anchor rods (3).
2. A modular auxiliary roof attachment for rapid closure of a water passing roadway as claimed in claim 1, wherein said aggregate intercepting grid comprises: a frame; the frame is fixed on a roadway top plate (5), a roadway bottom plate (6) and a roadway side wall (9), and the interception grid steel wire mesh is fixed on the frame through anchor cables (1) and/or anchor rods (3).
3. The combined auxiliary roof grafting device for rapid closure of a water passing roadway according to claim 1, wherein the combined auxiliary roof grafting device comprises a plurality of steel wire meshes, wherein the top, the bottom and the side parts of a first interception grid steel wire mesh are respectively fixed on a roadway top plate (5), a roadway bottom plate (6) and a roadway side wall (9) through anchor cables (1) and/or anchor rods (3) and a frame (2) in a retractable manner; the tops of the rest top-connected grid steel wire meshes are fixed on a roadway top plate (5) through anchor cables (1) and/or anchor rods (3), the side parts and the bottoms of the top-connected grid steel wire meshes are in a natural suspension state, and the top-connected grid steel wire meshes are connected through counterweight steel bars (8) at the bottoms so as to be synchronously retracted and extended.
4. A combined auxiliary roof-engaging device for rapid closure of a water-passing tunnel according to claim 1, characterized in that the interception grid wire mesh and/or the roof-engaging grid wire mesh are woven by means of steel strands (11), the steel strands (11) being connected by means of a snap (12).
5. The combined auxiliary roof grafting device for rapid closure of a water passing roadway according to claim 1, wherein the aggregate interception grid wire mesh is 5-10mm in diameter and the roof grafting grid wire mesh is 20-30mm in diameter.
6. The combined auxiliary roof grafting method for quickly intercepting a water passing roadway is characterized by comprising the following steps of:
an aggregate interception grating is arranged at the downstream of a to-be-built water-blocking wall section, the aggregate interception grating comprises an interception grating steel wire mesh, and the interception grating steel wire mesh is retractably fixed on a roadway through anchor cables (1) and/or anchor rods (3);
installing a roof auxiliary roof-engaging grill upstream of the aggregate-intercepting grill, the auxiliary roof-engaging grill comprising: a top-connected grid steel wire mesh, wherein the mesh diameter of the top-connected grid steel wire mesh is larger than that of the interception grid steel wire mesh; the top-connected grid steel wire meshes are multiple, and the top and the bottom of each top-connected grid steel wire mesh are respectively connected through a connecting steel bar (7) and a counterweight steel bar (8); the roof-connected grid steel wire mesh net can be retractable and fixed on a roadway roof (5) through anchor cables (1) and/or anchor rods (3);
after water burst, the interception grid wire mesh and/or the roof-grafting grid wire mesh are unfolded to intercept aggregate and/or roof.
7. The combined auxiliary roof grafting method for rapid closure of a water passing roadway according to claim 6, wherein the distance between the bottom of the expanded roof grafting grid wire mesh and the roadway roof (5) is smaller than the distance between the bottom of the expanded interception grid wire mesh and the roadway roof (5).
8. The method of claim 6, wherein the grid wire mesh is installed within 20-50 meters upstream of the interception grid wire mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111286292.6A CN113982684B (en) | 2021-11-02 | 2021-11-02 | Combined auxiliary roof connecting device and method for rapid closure of water passing tunnel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111286292.6A CN113982684B (en) | 2021-11-02 | 2021-11-02 | Combined auxiliary roof connecting device and method for rapid closure of water passing tunnel |
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| CN113982684A CN113982684A (en) | 2022-01-28 |
| CN113982684B true CN113982684B (en) | 2023-10-27 |
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