CN211174154U - Coal road supporting corner hinged supporting plate and coal road combined supporting structure - Google Patents
Coal road supporting corner hinged supporting plate and coal road combined supporting structure Download PDFInfo
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- CN211174154U CN211174154U CN201920510636.9U CN201920510636U CN211174154U CN 211174154 U CN211174154 U CN 211174154U CN 201920510636 U CN201920510636 U CN 201920510636U CN 211174154 U CN211174154 U CN 211174154U
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Abstract
The utility model discloses a shouldered angle hinged support board and coal road combined support structure that coal road was strutted, shouldered angle hinged support board is articulated by two stock trays and is formed, form "┐" shape layer board, the contained angle of two stock trays can be adjusted according to the flare angle between coal road roof and the group portion, "┐" shape layer board sets up in the sectional shoulder angle of coal road, the anchor is between coal road surface and stock pretension nut, with the stock in the sectional shoulder angle department of coal road, steel band and reinforcing bar net connect into whole, form the combined support system that has the synergism, can strengthen the support intensity of lane shoulder angle department, improve its anti-shearing ability, prevent simultaneously that this position crack from developing and causing the roof collapse, avoid traditional support mode not enough, finally improve the overall stability and the effect of strutting of whole tunnel, guarantee the security of coal road in service period.
Description
Technical Field
The utility model belongs to the coal road supports the field, especially relates to a bight articulated layer board and coal road combined supporting structure that coal road was strutted.
Background
In the coal mine production work of China, a roadway is an important channel for serving the coal mine stoping work. In order to improve the tunneling efficiency of the roadway and achieve the optimization of stability control within a balance service life and saving of supporting cost, the roadway of a mining area generally adopts a rectangular section. Because the shear stress at the shoulder angle of the rectangular roadway is concentrated strongly, the surrounding rock at the shoulder angle is sheared and damaged to generate cracks, and the cracks grow towards the direction of the roadway top plate to finally cause the top plate to collapse. The roadway of the coal mining area in China is generally soft and broken surrounding rocks, and along with the increase of mining depth and the influence of special geological structures, the stress environment borne by the roadway surrounding rocks is deteriorated, so that the supporting difficulty is continuously increased, and therefore, the development of the supporting member for the roadway is of great significance.
The conventional coal roadway supporting member mainly acts on the top plate and the side part in a concentrated manner, the roadway shoulder angle with the largest shearing stress is neglected, the supporting system has a weak control effect on the surrounding rocks of the roadway shoulder angle, and the surrounding rocks of the shoulder angle generate cracks and develop towards the top plate and the rock mass of the two sides. In addition, under a conventional supporting method, the single anchor rods in the roadway side wall and top supporting system play a supporting role independently, a cooperative integral supporting system is difficult to form, the integral supporting effect is exerted, the prestressing direction is only a single vertical direction or a single horizontal direction, the development of cracks generated on shoulder angle surrounding rocks and the stability of the surrounding rocks in an anchoring area after the roadway is excavated are not controlled favorably, and finally, the supporting members are broken by each bolt and the roadway is unstable.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a supporting component of hexagon tunnel shoulder angle "┐" shape layer board, this supporting component is formed by two stock trays are articulated, can adjust according to the angle that roof and lane group formed in the tunnel section, in order to reach the purpose that the tray closely laminates with the country rock and improves country rock stability, through the stock of group is located to the shoulder angle, the connection effect of steel band makes tunnel roof and two group, the supporting construction in the middle of tunnel bottom plate and two groups and the lane group forms the two stock joint support system in shoulder angle that has the synergism, form the extrusion pocket to coal rock roof and tunnel group portion and lane group shoulder angle department and protect the effect, thereby reinforcing tunnel overall stability.
The utility model discloses a following technical scheme realizes:
the utility model provides a shoulder angle hinge plate that coal road was strutted, this hinge plate is formed by two stock trays are articulated, form "┐" shape layer board, the contained angle of two stock trays can be adjusted according to the flare angle between coal road roof and the group portion, "┐" shape layer board sets up in the sectional shoulder angle of coal road, the anchor is between coal road surface and stock pretension nut, locate to connect into whole with stock, steel band and reinforcing bar net at the sectional shoulder angle of coal road, form the joint support system that has the synergism.
The utility model also provides an adopt the coal road of aforementioned shoulder angle hinge layer board to unite supporting construction for the hexagon tunnel, roof outside, two group are the top, two group middle parts, two group are the downside and the bottom plate outside bore the stock hole that corresponds to "┐" shape layer board hole site in shoulder angle department, reinforcing bar net and steel band are laid at roof and two group department, shoulder angle hinge layer board sets up in shoulder angle department roof outside, two group are the top, two group middle parts, two group downside and bottom plate outside to lie in the outside of reinforcing bar net and steel band, the stock is installed in the stock hole, and stock, steel band and reinforcing bar net connect into whole, form the joint supporting construction who has the synergism.
The utility model discloses a tunnel shoulder angle "┐" shape layer board supporting member is formed by two tray hinges, use in the hexagon tunnel, through "┐" shape layer board with each shoulder angle department stock in tunnel, the steel band, connect into whole with the reinforcing bar net, two group's stock perpendicular to tunnel slope stretches into to consolidating the confined rock stratum, make the tunnel stock couple together different terranes, increase the resistance between the layer, support the resistance and distribute in tunnel shoulder angle department more evenly, increase the supporting force of lane shoulder angle department, and make tunnel roof and two group support the system and form the joint support system that has the synergism in shoulder angle department, the hidden danger of tunnel shoulder angle department crack development has been avoided, the stability of system is strutted in the improvement.
By the above-mentioned technical scheme, the utility model provides a tunnel shoulder angle "┐" type layer board supporting construction system, through strengthening shoulder angle department support intensity to with roof and two group, the bottom plate couples together with the system of strutting between two groups and the lane group, forms the joint support system that many stocks strutted in coordination, improves the tradition and struts the not enough in lane group angle department, thereby improves the overall reliability of system is strutted in the tunnel.
Drawings
Fig. 1 is a schematic view of a supporting plate supporting system of a hexagonal section roadway '┐';
FIG. 2 is a detail view of the support at the shoulder angle;
FIG. 3 is a hexagonal cross-section tunnel "┐" shaped pallet;
FIG. 4 is a schematic view of the prestress distribution of the ┐ -shaped pallet;
fig. 5 is a schematic diagram of distribution of prestress of a hexagonal shoulder angle section roadway for mounting an '┐' shaped supporting plate.
In the figure, 1- ┐ -shaped supporting plate, 2-transverse steel belt, 3-anchor rod, 4-anchor rod tray and 5-reinforcing mesh.
Detailed Description
The utility model provides a tunnel bight "┐" shape layer board supporting construction system preferred embodiment as follows:
after the section of the roadway is excavated, according to the design, supporting holes are arranged on the outermost side of a top plate at a shoulder angle, the uppermost sides of two sides and the middle of two sides, anchor rod holes corresponding to ┐ -shaped supporting plate holes are respectively drilled on the outermost sides of the lowermost sides and the outermost sides of a bottom plate of the two sides, the anchor rod holes on the outermost sides of the top plate (bottom plate) are required to be inclined towards the shoulder angle by 15 degrees to 20 degrees in a way of being vertical to the roadway, the anchor rod holes on the uppermost sides (lower sides) of the two sides are inclined towards the shoulder angle by 15 degrees to 20 degrees in a way of being vertical to the roadway, the anchor rod holes on the shoulder angle in the middle of the roadway are inclined towards the shoulder angle by 15 degrees to.
After drilling anchor rod holes, laying a steel bar mesh 5 on the surface of a roadway, connecting the steel bar mesh with the previously laid steel bar mesh by using No. 14 steel wires, installing steel bars, then respectively installing top outermost anchor rods and side anchor rods, installing an ┐ -shaped supporting plate 1 at the end part of each anchor rod 3, applying pre-tightening force to enable a transverse steel strip 2 and the steel bar mesh to be tightly attached to the rock surface of the roadway, wherein the transverse steel strip can be a W-shaped steel strip or a steel bar steel strip and the like, and finally welding rib plates between the supporting plates to fix the angle between anchor rod trays 4.
The anchor rod is a left-handed thread steel anchor rod with the length of 1.8-2.4 m and the first anchor rod is f 18-22 mm, and the second anchor rod is a left-handed thread steel anchor rod or a round steel anchor rod with the length of 1.6-2.4 m and the second anchor rod is f 18-22 mm. Each anchor rod is anchored by two rolls of anchoring agent in an lengthening way (one roll of MSCK2355 resin anchoring agent and one roll of MSK2355 resin anchoring agent, wherein the MSCK2355 resin anchoring agent is arranged at the bottom of a hole).
The anchor rod anchoring end is provided with a matched diagonal pulling supporting plate.
The shoulder angle ┐ -shaped supporting plate is made of Q235 steel, the length of each arm ┐ -shaped is 360mm, the width of each arm is 250mm, and the thickness of each steel plate is 20 mm.
The steel strip can be a W-shaped steel strip with the thickness of 3-5 mm and the width of 280mm or a steel bar ladder beam made of f14mm steel bars. The reinforcing mesh is made of f6.5mm reinforcing steel bars.
Firstly, excavating a roadway section into a hexagon capable of ensuring the stability of surrounding rocks, drilling anchor rod holes corresponding to '┐' -shaped supporting plate holes on the outermost side of a top plate at a shoulder angle according to supporting holes, the uppermost sides of two sides, the middle parts of two sides, the lowermost sides of two sides and the outermost sides of a bottom plate respectively, wherein the anchor rod holes on the outermost side of the top plate (bottom plate) are required to be vertically inclined to the shoulder angle of the roadway by 15-20 degrees, the anchor rod holes on the uppermost sides (lower sides) of two sides are required to be vertically inclined to the shoulder angle by 15-20 degrees, the anchor rod holes on the shoulder angle of the middle parts of the sides are required to be vertically arranged to the roadway side, paving a steel mesh and a steel strip (the steel strip can be a 'W' -shaped steel strip or a trapezoidal steel bar beam) on the top plate and the two sides according to design requirements, placing the '┐' -shaped supporting plate in place according to the requirements of the eye positions on the outer sides of the steel mesh and the steel strip, finally installing 18 mm of the anchor rod holes drilled before, the length of the steel strip can be 1.6-2.4 m, applying a left-handed screw thread anchoring agent and applying a pre-tightening steel bolt and a round steel rod anchoring nut (┐) and applying a pre-shaped anchoring screw bolt).
Claims (2)
1. A shoulder angle hinged supporting plate for supporting a coal roadway is characterized in that the hinged supporting plate is formed by hinging two anchor rod trays to form an ┐ -shaped supporting plate, the included angle of the two anchor rod trays can be adjusted according to the field angle between a top plate and a side part of the coal roadway, the ┐ -shaped supporting plate is arranged at a shoulder angle of a coal roadway section and is anchored between the surface of the coal roadway and an anchor rod pre-tightening nut, and the anchor rod, a steel belt and a steel bar net are connected into a whole at the shoulder angle of the coal roadway section to form a combined supporting system with a synergistic effect.
2. A coal roadway combined supporting structure adopting the shoulder angle hinged supporting plate disclosed by claim 1, which is used for a hexagonal roadway and is characterized in that anchor rod holes corresponding to ┐ -shaped supporting plate hole positions are drilled in the outermost side of a top plate, the uppermost sides of two sides, the middle parts of two sides, the lowermost sides of two sides and the outermost side of a bottom plate at a shoulder angle, the steel bar nets and the steel belts are laid at the top plate and the two sides, the shoulder angle hinged supporting plate is arranged at the outermost side of the top plate, the uppermost sides of two sides, the middle parts of two sides, the lowermost sides of two sides and the outermost side of the bottom plate at the shoulder angle and is positioned on the outer sides of the steel bar nets and the steel belts, the anchor rods are arranged in the anchor rod holes, and the anchor rods, the steel belts and.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920510636.9U CN211174154U (en) | 2019-04-15 | 2019-04-15 | Coal road supporting corner hinged supporting plate and coal road combined supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920510636.9U CN211174154U (en) | 2019-04-15 | 2019-04-15 | Coal road supporting corner hinged supporting plate and coal road combined supporting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211174154U true CN211174154U (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920510636.9U Expired - Fee Related CN211174154U (en) | 2019-04-15 | 2019-04-15 | Coal road supporting corner hinged supporting plate and coal road combined supporting structure |
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| CN (1) | CN211174154U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704324A (en) * | 2022-03-28 | 2022-07-05 | 中国矿业大学 | Gangue blocking tray and non-roadside filling gob-side entry retaining goaf side cooperative control structure |
-
2019
- 2019-04-15 CN CN201920510636.9U patent/CN211174154U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704324A (en) * | 2022-03-28 | 2022-07-05 | 中国矿业大学 | Gangue blocking tray and non-roadside filling gob-side entry retaining goaf side cooperative control structure |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200804 |
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| CF01 | Termination of patent right due to non-payment of annual fee |