CN210948737U - Efficient and rapid tunneling roadway support facility for inclined small-section half-coal-rock roadway with thin coal seam - Google Patents
Efficient and rapid tunneling roadway support facility for inclined small-section half-coal-rock roadway with thin coal seam Download PDFInfo
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- CN210948737U CN210948737U CN201921974980.XU CN201921974980U CN210948737U CN 210948737 U CN210948737 U CN 210948737U CN 201921974980 U CN201921974980 U CN 201921974980U CN 210948737 U CN210948737 U CN 210948737U
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Abstract
The utility model discloses a facility is strutted in high-efficient quick tunnelling of half coal rock roadway of low seam slope small cross section sets up in the tunnelling, group, tunnel roof, tunnel bottom plate constitute under group, the tunnel on the tunnel. The roadway roof and the coal seam roof are aligned in parallel and form the same plane; the roadway bottom plate is horizontally arranged. A row of anchor rods and anchor cables are arranged at the center line of the roadway top plate; and a row of roof anchor rods are respectively arranged on the roof of the roadway close to the upper wall and the lower wall of the roadway. The upper, middle and lower parts of the roadway upper wall are respectively provided with a row of anchor rods. And a steel wire mesh is hung between the tail end of the anchor rod cable and the tail end of the anchor rod. The utility model discloses mainly adopt stock, anchor rope and hang the initiative of establishing reinforcing bar net formation and strut, utilize the supporting ability of rock mass self, strut tunnel roof and last group. And the support belongs to flexible support, so that the shock of blasting can be absorbed more favorably, and a stable roadway can be formed more favorably.
Description
Technical Field
The utility model relates to a coal mining tunnel struts facility.
Background
The mining difficulty of the inclined thin coal seam is very high, including the difficulty of tunneling in a tunnel, and the sectional area of the tunneled coal mining tunnel is small in order to reduce the mining cost due to the thin coal seam, so that large-scale mechanical operation cannot be adopted, and the blasting tunneling method is usually adopted in the existing inclined thin coal seam tunnel mining. However, the shock of blasting is large, and the surrounding rock mass is greatly influenced.
In order to solve this problem, in the prior art, a high-strength support is adopted in the roadway, for example, a hydraulic prop with a large supporting force, a dense prop, an infusion support, a steel column and steel beam support, or a combination thereof is used to resist the huge vibration in blasting and tunneling, so as to protect the roadway safety. However, the cost of the support is high, the construction period is long, and the comprehensive cost of coal mining is influenced.
Therefore, comprehensively, the construction of low-performance support is complex, the construction period is long, the high-efficiency and quick tunneling cannot be better matched, and the obtained support performance is poor due to the main external support.
SUMMERY OF THE UTILITY MODEL
In order to solve above-mentioned problem, shorten construction cycle and cost, provide the initiative in tunnel and strut, cooperate high-efficient quick tunnelling tunnel better, offset the vibrations of blasting, the utility model provides a facility is strutted in high-efficient quick tunnelling in low section half coal rock roadway of thin coal seam slope.
The utility model discloses a facility is strutted in high-efficient quick tunnelling of half coal rock roadway of low seam slope small cross section sets up in the tunnelling, group, tunnel roof, tunnel bottom plate constitute under group, the tunnel on the tunnel.
Tunneling a tunnel into the coal seam, wherein the top plate of the tunnel is aligned with the top plate of the coal seam in parallel and forms the same plane; the roadway bottom plate is horizontally arranged.
Three rows of roof anchor rods and one row of anchor cables are arranged to be beaten into the rock mass of the roadway roof; the anchor cable is arranged at the center line along the direction of the roadway; wherein the first row of roof bolts are arranged at the center line along the trend of the roadway; arranging a second row of roof anchor rods on the roof of the roadway close to the lower wall of the roadway; and a third row of roof anchor rods are arranged on the roadway roof close to the upper side of the roadway.
Three rows of upper anchor rods are arranged to be drilled into a rock body of the upper wall of the roadway, wherein a first row of upper anchor rods are arranged in the middle of the upper wall of the roadway; and a second row of upper anchor rods are arranged at the junction of the coal seam and the rock mass of the upper wall of the roadway, and a third row of upper anchor rods are arranged at one quarter of the lower part of the upper wall of the roadway.
And a steel wire mesh is hung between the tail end of the anchor rod cable and the tail end of the anchor rod.
The efficient and rapid tunneling roadway support facility for the inclined small-section half-coal rock roadway with the thin coal seam is further described as that the anchor cable is perpendicular to the top plate of the roadway.
The efficient and rapid tunneling roadway support facility for the inclined small-section half-coal-rock roadway with the thin coal seam is further described in the specification that the first row of roof anchor rods are perpendicular to the roof of the roadway.
The efficient and rapid tunneling roadway support facility for the inclined small-section half-coal-rock roadway with the thin coal seam is further described in the specification that the second row of roof anchor rods are perpendicular to the roof of the roadway.
According to the efficient and rapid tunneling roadway support facility for the inclined small-section half-coal-rock roadway with the thin coal seam, a first included angle is formed between the roadway upper wall and the vertical line of the roadway top plate, and the top plate anchor rods in the third row are driven into the rock mass along the angular bisector direction of the first included angle.
The efficient and rapid tunneling roadway support facility for the inclined small-section half-coal-rock roadway with the thin coal seam is further described in the specification that the first row of upper anchor rods is perpendicular to the upper wall of the roadway.
According to the efficient and rapid tunneling roadway support facility for the inclined small-section half-coal-rock roadway with the thin coal seam, a second included angle is formed between the vertical line of the upper wall of the roadway and the trend of the coal seam, and the anchor rods of the upper wall of the second row are driven into the rock mass along the direction of the bisector of the second included angle.
According to the efficient and rapid tunneling roadway support facility for the inclined small-section half-coal-rock roadway with the thin coal seam, the steel wire meshes are paved from the junction of the roadway top plate and the roadway lower wall to one fourth of the lower part of the roadway upper wall.
The efficient and rapid tunneling roadway support facility for the low-coal-seam inclined small-section half-coal-rock roadway is further described as follows, the anchor cables and the first row of roof anchor rods are alternately distributed along the direction of the roadway.
According to the efficient and rapid tunneling roadway support facility for the low-coal-seam inclined small-section half-coal-rock roadway, the second row of roof anchor rods are arranged 15cm away from the junction of the roadway roof and the roadway lower wall; and the third row of roof bolts are arranged at the position 15cm away from the junction of the roadway roof and the roadway upper wall.
Has the advantages that:
the utility model discloses mainly adopt stock, anchor rope and hang the initiative of establishing reinforcing bar net formation and strut, utilize the supporting ability of rock mass self, strut tunnel roof and last group. And the support belongs to flexible support, so that the shock of blasting can be absorbed more favorably, and a stable roadway can be formed more favorably.
The support has simple structure, is convenient and quick to construct, and is beneficial to the high-efficiency quick tunneling of the inclined small-section half-coal rock roadway of the thin coal seam.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein: a laneway lower wall 1; a coal seam 2; an anchor rod 3; an anchor cable 4; a roadway roof 5; a roadway roof vertical line 6; a vertical line 7 is arranged on the roadway upper wall; an upper roadway wall 8; a roadway floor 9; a steel mesh 10.
Detailed Description
The excavation roadway is composed of an upper roadway wall 8, a lower roadway wall 1, a roadway top plate 5 and a roadway bottom plate 9.
The excavation roadway is excavated in the coal seam 2, the roadway top plate is aligned with the coal seam top plate in parallel and forms the same plane, the excavation roadway top plate is an inclined top plate, the excavation roadway top plate is inclined downwards from the upper side of the roadway and towards the lower side of the roadway, the inclination angle of the coal seam in the embodiment is about 30 degrees, and therefore the inclination angle of the roadway top plate is still 30 degrees. The roadway bottom plate is horizontally arranged, the roadway upper wall and the roadway lower wall are vertically arranged, and therefore the whole roadway section in the embodiment is trapezoidal.
When the roadway is utilized, the upper corner of the lower side of the roadway is provided with a ventilation pipeline. The tunnel is divided into a left part and a right part, and the part close to the lower wall of the tunnel is used for installing a belt conveyer. And the position close to the upper wall of the roadway is used for mounting a small train track. The junction of the roadway upper wall and the roadway bottom plate is provided with a cut which is used as a water channel.
Three rows of roof anchor rods 3 are arranged in the rock mass of the roadway roof and are respectively a first row of roof anchor rods, a second row of roof anchor rods and a third row of roof anchor rods. Meanwhile, a row of anchor cables 4 are also driven into the top plate of the roadway.
Wherein the first row of roof bolts are arranged at the center line along the trend of the roadway and are vertical to the roof of the roadway.
The second row of roof anchor rods are arranged on the roadway roof and close to the roadway lower side, are 15cm away from the junction of the roadway roof and the roadway lower side, and are perpendicular to the roadway roof.
And the third row of roof bolts are arranged on the roof of the roadway close to the upper part of the roadway. A first included angle is formed between the upper wall of the roadway and the vertical line 6 of the top plate of the roadway, and the top plate anchor rods in the third row are driven into the rock mass along the direction of the angular bisector of the first included angle. In addition, the angle bisector direction along the first included angle is driven into the rock mass, the angle bisector direction is not coincident with the angle bisector direction, the angle of driving into the rock mass is consistent, the direction is consistent, and the third row of roof anchor rods can be understood to be parallel to the angle bisector of the first included angle.
The anchor cable is arranged at the center line along the direction of the roadway; and is perpendicular to the roadway roof.
Three rows of upper anchor rods are arranged in the rock mass of the upper wall of the roadway. Respectively a first row of upper anchor rods, a second row of upper anchor rods and a third row of upper anchor rods.
Wherein the first row of upper anchor rods are arranged in the middle of the upper wall of the roadway and are vertical to the upper wall of the roadway.
The anchor rods for the upper wall in the second row are arranged at the junction of the coal bed and the rock body of the upper wall of the roadway, a second included angle is formed between the vertical line 7 of the upper wall of the roadway and the trend (inclined direction) of the coal bed, and the anchor rods for the upper wall in the second row are driven into the rock body along the direction of the angle bisector of the second included angle. In addition, the angle bisector direction along the second included angle is not coincident with the angle bisector, but is consistent with the angle bisector direction along the second included angle, the angle of the rock mass is consistent, the direction is consistent, and the second row of the upper anchor rods can be understood as the angle bisector of the second included angle.
A third row of upper anchor rods are arranged at one fourth of the lower part of the upper wall of the roadway; and the third row of roof bolts are arranged at the position 15cm away from the junction of the roadway roof and the roadway upper wall.
The anchor cables and the first row of roof anchor rods are alternately distributed along the direction of the roadway.
And a steel wire mesh 10 is hung between the tail end of the anchor rod cable and the tail end of the anchor rod. The steel wire mesh is a whole piece of mesh, and is laid from the junction of the top plate of the roadway and the lower wall of the roadway until the distance between the top plate of the roadway and the lower wall of the roadway is one quarter.
The first embodiment is as follows:
the distance between the anchor rods in each row is 1.0-1.2 m, the diameter of the anchor rope is 17.8mm, × 5300mm and the distance is 3000 mm.
After the anchor rod is driven in, the front end of the anchor rod is totally immersed into the rock body, only the tail end with the length of about 3-5cm is left outside, the tail end is provided with threads, the reinforcing mesh is paved on the surface of the rock body, then, the reinforcing mesh is fixed at the tail end of the anchor rod through the threads by using a tray, and meanwhile, the reinforcing mesh is pressed on the rock body by the tray, so that the paving of the reinforcing mesh is completed.
Example two:
the specification of three rows of anchor rods on the roadway roof is as follows: the left-handed thread steel high-strength anchor rod is used, and the specification is psi 20mm 2200mm
The high-strength arched pallet of 150mm × 150mm × 12mm and the high-strength nut are matched as matched products, and the lengthened resin is adopted for anchoring, and the diameter of a drill hole in a rock body is 28 mm.
The reinforcing mesh is used as an auxiliary support and adopts phi 6mm
The reinforcing steel bars are manufactured by self-welding, the specification of the reinforcing steel bar net of the top plate is 2650mm × 1100mm, the specification of the mesh is 100mm × 100mm, two reinforcing steel bar nets are used in each row, the adjacent reinforcing steel bar nets are lapped by about 100mm, 16# iron wire buttons are used for connection, holes are connected, and each iron wire button is twisted by at least 3 circles.
Anchor rod anchoring force: the roof bolt design anchorage force is 100 kN.
Anchor rod installation pretightning force: firstly, an anchor rod stirring resin cartridge is installed by using an anchor rod drilling machine, then a nut is screwed by using a large-torque wrench, the pre-tightening torque of the anchor rod is not less than 300 N.m and not more than 500 N.m, if the torque requirement cannot be met, a torque amplifier is purchased, and the pre-tightening torque of the anchor rod is made to meet the requirement as far as possible.
The specification of the roadway upper wall three-row anchor rod is as follows: the left-handed thread steel high-strength anchor rod is used, and the specification is psi 18mm 1800mm
The high-strength arched tray with the height of 150mm × 150mm × 12mm and the high-strength nut are matched as matched products.
And adopting lengthened resin for anchoring, wherein the diameter of a drill hole in the rock body is 28 mm.
The roadway upper side is matched with a rhombic metal net serving as an auxiliary support, the metal net is made of No. 8 iron wires, the specification is 3000mm × 1100mm, the mesh specification is 40mm × 40mm, two pieces are used in each row, the adjacent nets are lapped for about 100mm, 16# iron wire buttons are used for connection, the holes are connected, and each iron wire is twisted for at least more than 3 circles.
Anchor rod anchoring force: the anchor rod design anchoring force is 100 kN.
Anchor rod installation pretightning force: firstly, an anchor rod stirring resin cartridge is installed by using an anchor rod drilling machine, then a nut is screwed by using a large-torque wrench, the pre-tightening torque of the anchor rod is not less than 200 N.m and not more than 500 N.m, if the torque requirement cannot be met, a torque amplifier is purchased, and the pre-tightening torque of the anchor rod is made to meet the requirement as far as possible.
The specification of the anchor cable is that 1 × 7 strands of high-strength low-relaxation steel strands are adopted for manufacturing the anchor cable, and the diameter of the anchor cable is psi 17.8mm
The breaking load is 355KN, the elongation is 4%, the anchor cable is 5300mm long, and the effective length is about 5000 mm; in the section with great change of the coal seam thickness, the length of the anchor cable can be adjusted as required, and the anchor cable at least extends into the coal seam roof more than 1500 mm.
Arranging anchor cables: the central vertical roof of the roadway roof is arranged in a row, and the row spacing is 3000 mm.
Anchorage force of the anchor cable: the anchor cable design anchorage force is greater than 250 kN.
Pre-tightening force of the anchor cable: the anchor cable pretightening force is 200 KN.
Claims (8)
1. The high-efficiency rapid excavation roadway support facility for the low-coal-seam inclined small-section half-coal-rock roadway is arranged in an excavation roadway and comprises an upper roadway wall, a lower roadway wall, a roadway top plate and a roadway bottom plate; the method is characterized in that the tunneling roadway is dug into the coal seam, and the top plate of the roadway is aligned with the top plate of the coal seam in parallel and forms the same plane; the roadway bottom plate is horizontally arranged;
three rows of roof anchor rods and one row of anchor cables are arranged to be beaten into the rock mass of the roadway roof; the anchor cable is arranged at the center line along the direction of the roadway; wherein the first row of roof bolts are arranged at the center line along the trend of the roadway; arranging a second row of roof anchor rods on the roof of the roadway close to the lower wall of the roadway; arranging a third row of roof anchor rods on the top plate of the roadway close to the upper wall of the roadway, forming a first included angle between the upper wall of the roadway and the vertical line of the top plate of the roadway, and driving the third row of roof anchor rods into a rock mass along the direction of the bisector of the first included angle;
three rows of upper anchor rods are arranged to be drilled into a rock body of the upper wall of the roadway, wherein a first row of upper anchor rods are arranged in the middle of the upper wall of the roadway; a second row of upper anchor rods are arranged at the junction of the coal seam and the rock mass of the upper wall of the tunnel, a second included angle is formed between the vertical line of the upper wall of the tunnel and the trend of the coal seam, and the second row of upper anchor rods are driven into the rock mass along the angular bisector direction of the second included angle; a third row of upper anchor rods are arranged at one fourth of the lower part of the upper wall of the roadway;
and a steel wire mesh is hung between the tail end of the anchor rod cable and the tail end of the anchor rod.
2. The efficient and rapid tunneling roadway support facility for the inclined small-section half-coal-rock roadway with the thin coal seam as claimed in claim 1, wherein the anchor cables are perpendicular to the roadway top plate.
3. The efficient and rapid tunneling roadway support facility for the inclined small-section half-coal-rock roadway with the thin coal seam as claimed in claim 1, wherein the first row of roof bolts is perpendicular to the roadway roof.
4. The efficient and rapid excavation roadway support facility for the low-seam inclined small-section half-coal-rock roadway of claim 1, wherein the second row of roof bolts is perpendicular to the roadway roof.
5. The efficient and rapid tunneling roadway support facility for the inclined small-section half-coal-rock roadway with the thin coal seam as claimed in claim 1, wherein the first row of upper anchor rods is perpendicular to the upper side of the roadway.
6. The efficient and rapid tunneling roadway support facility for the inclined small-section half-coal-rock roadway with the thin coal seam as claimed in claim 1, wherein the steel wire mesh is laid from the junction of the roadway top plate and the roadway lower wall to the lower quarter of the roadway upper wall.
7. The efficient and rapid tunneling roadway support facility for the inclined small-section half-coal-rock roadway with the thin coal seam as claimed in claim 1, wherein the anchor cables and the first row of roof bolts are alternately distributed along the roadway direction.
8. The efficient and rapid tunneling roadway support facility for the inclined small-section half-coal-rock roadway with the thin coal seam as claimed in claim 1, wherein the second row of roof bolts are arranged 15cm away from the junction of the roadway roof and the roadway lower wall; and the third row of roof bolts are arranged at the position 15cm away from the junction of the roadway roof and the roadway upper wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921974980.XU CN210948737U (en) | 2019-11-15 | 2019-11-15 | Efficient and rapid tunneling roadway support facility for inclined small-section half-coal-rock roadway with thin coal seam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921974980.XU CN210948737U (en) | 2019-11-15 | 2019-11-15 | Efficient and rapid tunneling roadway support facility for inclined small-section half-coal-rock roadway with thin coal seam |
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| Publication Number | Publication Date |
|---|---|
| CN210948737U true CN210948737U (en) | 2020-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921974980.XU Expired - Fee Related CN210948737U (en) | 2019-11-15 | 2019-11-15 | Efficient and rapid tunneling roadway support facility for inclined small-section half-coal-rock roadway with thin coal seam |
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| CN (1) | CN210948737U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112065481A (en) * | 2020-08-28 | 2020-12-11 | 山东李楼煤业有限公司 | Anti-shearing anchor rod and supporting method for preventing shearing and dislocation of top plate |
| CN114718620A (en) * | 2021-12-23 | 2022-07-08 | 中国矿业大学 | 7 type tray and big inclination coal seam tunnel high group anchor in coordination protect structure |
-
2019
- 2019-11-15 CN CN201921974980.XU patent/CN210948737U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112065481A (en) * | 2020-08-28 | 2020-12-11 | 山东李楼煤业有限公司 | Anti-shearing anchor rod and supporting method for preventing shearing and dislocation of top plate |
| CN114718620A (en) * | 2021-12-23 | 2022-07-08 | 中国矿业大学 | 7 type tray and big inclination coal seam tunnel high group anchor in coordination protect structure |
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| GR01 | Patent grant | ||
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Granted publication date: 20200707 Termination date: 20201115 |