CN203145954U - Bolt support system - Google Patents

Bolt support system Download PDF

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Publication number
CN203145954U
CN203145954U CN 201320067494 CN201320067494U CN203145954U CN 203145954 U CN203145954 U CN 203145954U CN 201320067494 CN201320067494 CN 201320067494 CN 201320067494 U CN201320067494 U CN 201320067494U CN 203145954 U CN203145954 U CN 203145954U
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CN
China
Prior art keywords
anchor
bolt support
anchor cable
board
lane
Prior art date
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CN 201320067494
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Chinese (zh)
Inventor
马万祥
康红普
陈治中
沈铭华
王文新
张锦宏
邓新东
吕凤圆
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenhua Group Corp Ltd
Shenhua Ningxia Coal Industry Group Co Ltd
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Shenhua Group Corp Ltd
Shenhua Ningxia Coal Industry Group Co Ltd
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Priority to CN 201320067494 priority Critical patent/CN203145954U/en
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Publication of CN203145954U publication Critical patent/CN203145954U/en
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Abstract

The utility model provides a bolt support system. The bolt support system comprises a roadway, roadway sides, a top plate and a bottom plate, wherein the roadway sides and the top plate are provided with a plurality of bolts and anchor cables which are fixedly connected with a rock layer outside the roadway, a support frame composed of W-shaped steel strips is arranged on the top plate, W-shaped steel guard boards are arranged on the roadway sides, a reinforcing mesh covering the support frame is arranged on the top plate, and barbed wires covering the W-shaped steel guard boards are arranged on the roadway sides. According to the bolt support system, the support density is reduced effectively, the roadway can be prevented from deforming in the whole construction process, falling along with tunneling and wall caving can be avoided, immediate maintenance after tunneling can be avoided, the tunneling speed is increased, and the working efficiency is improved.

Description

A kind of bolt support system
Technical field
The utility model relates to colliery, pit mining roadway support technical field, relates in particular to a kind of bolt support system.
Background technology
Existing roadway bolt support system, it is anchor rete cord+steel band combined supporting, and the regular screw threads steel anchor rod of specification Φ 20 * 2500mm is selected at the top, tunnel for use, and array pitch is 740 * 800mm between anchor pole; Tunnel portion of group adopts the rod bolt supporting of Φ 16 * 1600mm, and the shell feed plate of supporting 120 * 120 * 10mm and the bunk of 400 * 200 * 40mm use, between anchor pole, array pitch is 800 * 800mm; Back adopts the steel mesh reinforcement of the round steel welding of Φ 6.5mm, and the mesh specification is 100 * 100mm, and tunnel portion of group adopts the diamond mesh by the establishment of 8# galvanized wire, mesh 50 * 50mm, the full section linked network in tunnel; The top, tunnel is the anchor cable girder of 1600mm along the center line array pitch that is symmetrically arranged, and anchor cable spacing 2000mm, anchor cable joist adopt mining 11# i iron processing, and processing length is 2500mm.
Owing to be subjected to the variation (geological structures such as inclination angle and tomography etc.) of work plane condition of coal seam occurrence, geostatic stress is more concentrated, surrouding rock stress redistribution behind the roadway excavation, can occur that back " coal big gun " sound is big, the amount of crushing big, the steel mesh reinforcement pressurized is torn, following shoulder nest place anchor pole is broken, and the anchor cable pressurized such as is broken at phenomenon.
The utility model content
In view of this, the purpose of this utility model is to solve problems of the prior art, and a kind of bolt support system is provided.
The technical solution of the utility model provides a kind of bolt support system, comprise tunnel, lane group, top board and base plate composition, be provided with many on wherein said lane group and the described top board and be used for the anchor pole and the anchor cable that are connected and fixed with the outside lithosphere in described tunnel, wherein said top board is provided with the supporting frame of being made up of the W steel band of model, described lane is helped and is provided with W shaped steel backplate, also be provided with the steel mesh reinforcement that covers on the described supporting frame on the described top board, described lane is helped and also is provided with the wire gauze that covers on the described W shaped steel backplate.
Preferably, described anchor pole is the vertical muscle twisted steel anchor rod of the left-handed nothing of yield strength between 400MPa-500MPa.
Preferably, the array pitch between the described anchor pole is 900mm.
Preferably, described top board is provided with 5 described anchor poles.
Preferably, described anchor pole is that rupture pull force is the anchor pole of 304KN.
Preferably, described anchor cable is that 21.98mm, elongation per unit length are 7%, rupture pull force is the single-point anchor cable of the compressor wire twisted wire of 607KN for adopting diameter.
Preferably, described anchor cable is that 17.8mm, elongation per unit length are 4%, rupture pull force is the single-point anchor cable of the compressor wire twisted wire of 353KN for adopting diameter.
Preferably, described anchor pole is that pre-fastening moment is the anchor pole of 400Nm.
Preferably, described anchor cable and described lane group and top board junction are provided with and adopt steel plate to make the arch anchor cable supporting plate that is of a size of 300mm * 300mm * 16mm.
After adopting technique scheme, have following beneficial effect: adopt have high prestressed bolt support system after, owing to bring and increase the supporting area by pretightning force, the use W shaped steel that improves anchor pole, anchor cable, it has improved prestressing force, rigidity, the intensity of support system and has protected top area, the integrality of top board and lane group is obviously improved, laneway molding has bigger change, and whole section tunnel do not have to take place significantly distortion substantially, and the coal and rock of lane group and top board remains intact state substantially.Whole construction course top board and lane group is very smooth, does not have with pick to take place with emitting with the serious phenomenon of wall caving, and has improved driving speed, and avoided the phenomenon of repairing after the preceding pick.
Description of drawings
The structural representation of a kind of bolt support system that Fig. 1 provides for the utility model one embodiment;
Fig. 2 is the structural representation of the W steel band of model in the shown in Figure 1 a kind of bolt support system.
The specific embodiment
Further specify the specific embodiment of the present utility model below in conjunction with accompanying drawing.
Shown in Fig. 1-2, a kind of bolt support system that the utility model one embodiment provides, comprise tunnel 1, lane group 2, top board 3 and base plate 4 compositions, be provided with many on its inter-road group 2 and the top board 3 and be used for the anchor pole 5 and the anchor cable 6 that are connected and fixed with tunnel 1 outside lithosphere, wherein this top board 3 is provided with the supporting frame of being made up of W steel band of model 8 31, lane group 2 is provided with W shaped steel backplate 21, also be provided with the steel mesh reinforcement (not shown) that covers on the supporting frame 31 on the top board 2, also be provided with the wire gauze (not shown) that covers on the W shaped steel backplate 21 in the lane group 2.The utility model adopts yield strength greater than the High strength bolt 5 of 335MP, pretightning force reaches the high strength anchor cable 6 of 180kN, when skyhook 5, improve its pretightning force, make the pre-fastening moment of anchor pole 5 reach 400Nm by pre-clamping tool, improved bolt support system prestressing force thus, made the bolt support system before using, just have high prestressing force.The use of High strength bolt 5 and anchor cable 6, make anchor cable 6 and anchor pole 5 system variant more coordinate, anchor-holding force of anchor bolt is big, supporting capacity is strong, and more can adapt to high-ground stress, adopted and tunnel that geological structure influences in use, make anchor cable cable body intensity improve, the prestressing force level that applies has guaranteed that also than higher anchor cable prestressing force sphere of action is big, controls making good use of of surrounding rock separation layer, slip.W steel band of model 8, steel mesh reinforcement combination are carried out by improving the rigidity of structure of bolt support system by the bolt support system that the utility model provides, and form an integral body with anchor pole 5, increase the globality of support system.At the top board 3 peripheral W steel band of model supporting framves 31 of laying, lane group 2 is provided with W shaped steel backplate 21, to increase top board, lane group's position area and stress range of scatter, the stress diffusion is come, and with protection anchor pole, anchor cable, avoids it to be broken.After improving system stiffness, increase lifting surface area, the back deflection reduces greatly, and it can guarantee not take place significantly distortion, and the lane is helped and the coal and rock of top board remains intact state substantially.
Preferably, anchor pole 5 is the vertical muscle twisted steel anchor rod of the left-handed nothing of yield strength between 400MPa-500MPa.Array pitch between the anchor pole 5 is 900mm, and the spacing between the anchor pole 5 is 800mm.The rupture pull force of anchor pole 5 is 304KN.Anchor pole 5 can be chosen as the 22#-M24-BHRB600 High strength bolt.Anchor pole 5 is the vertical muscle twisted steel anchor rod of left-handed nothing, adopts the resin explosive roll anchoring of a joint Z2370 and a joint Z2335.
Preferably, in order to reduce support density effectively, top board 3 is provided with 5 anchor poles 5.
Preferably, anchor cable 6 is the single-point anchor cable of the compressor wire twisted wire of 21.98mm for adopting diameter, and the elongation per unit length of anchor cable 6 is 7%, and its rupture pull force is 607KN.Be that anchor cable 6 can be chosen as ¢ 21.98(1*19 thigh) anchor cable, adopt a joint Z2370 resin explosive roll end anchorage, array pitch 2000 * 1800mm between anchor cable.
Preferably, anchor cable 6 can also be the single-point anchor cable of the compressor wire twisted wire of 17.8mm for adopting diameter, and the elongation per unit length of anchor cable 6 is 4%, and its rupture pull force is 353KN.Be that anchor cable 6 also can be chosen as ¢ 17.8(1*7 thigh) anchor cable, adopt a joint Z2370 resin explosive roll end anchoring, array pitch 2000 * 1800mm between anchor cable.
The use of high strength, high-elongation anchor cable 6 makes anchor cable cable body elongation per unit length improve the more large deformation of suitable for surrounding rock, make anchor cable cable body intensity improve, the prestressing force level that applies has guaranteed that also than higher anchor cable prestressing force sphere of action is big, controls making good use of of surrounding rock separation layer, slip.
When skyhook 5, make the pre-fastening moment of High strength bolt 5 reach 400Nm by using torque multiplier.When installation, adopting novel pre-clamping tool--torque multiplier and hydraulic shock spanner make pre-fastening moment reach 400Nm.
Preferably, anchor cable 6 is provided with lane group 2 and top board 3 junctions and adopts steel plate to make the arch anchor cable supporting plate 7 that is of a size of 300mm * 300mm * 16mm.Arch anchor cable supporting plate 7 is used for fixedly anchor cable, and original anchor cable girder is changed to the single-point anchor cable, convenient construction.
A kind of bolt support system that the utility model provides, its anchor pole is that yield strength is the vertical muscle special screw thread steel anchor rod of left-handed nothing of 400-500MPa, adopt the resin explosive roll anchoring, adopt novel pre-clamping tool torque multiplier and hydraulic shock spanner to make pre-fastening moment reach 400Nm simultaneously, its top plate portion adopts the big W steel band of lifting surface area; Lane portion of group also adopts the big W shaped steel backplate that gets of lifting surface area, increases and protects top wall supporting area and stress range of scatter.Its anchor cable is the single-point anchor cable, adopts the resin explosive roll anchoring, and keeps support density constant, the arch form supporting plate that the anchor cable supporting plate adopts 300mm * 300mm * 16mm steel plate to make, and this anchor cable pretightning force can reach 180kN.The array pitch of anchor pole increases to 900mm, and spacing remains unchanged, and with between roofbolt, array pitch changes to 850 * 900mm by former design 740 * 800mm, roll bolt quantity is reduced to 5 by 6 simultaneously, reduces support density effectively.But improved rigidity, intensity, the pretightning force of support system and protected top area, the integrality of top board and lane group obviously is improved, laneway molding has bigger change, and whole section tunnel do not have to take place significantly distortion substantially, and the coal and rock of lane group and top board remains intact state substantially.Whole construction course top board and lane group is very smooth, does not have with pick to take place with emitting with the serious phenomenon of wall caving, and has avoided the phenomenon of repairing after the preceding pick, and improved driving speed, has improved operating efficiency.
Above-described only is principle of the present utility model and preferred embodiment.Should be pointed out that for the person of ordinary skill of the art, on the basis of the utility model principle, can also make some other modification, also should be considered as protection domain of the present utility model.

Claims (9)

1. bolt support system, it is characterized in that, comprise tunnel, lane group, top board and base plate composition, be provided with many on wherein said lane group and the described top board and be used for the anchor pole and the anchor cable that are connected and fixed with the outside lithosphere in described tunnel, wherein said top board is provided with the supporting frame of being made up of the W steel band of model, described lane is helped and is provided with W shaped steel backplate, also be provided with the steel mesh reinforcement that covers on the described supporting frame on the described top board, described lane is helped and also is provided with the wire gauze that covers on the described W shaped steel backplate.
2. a kind of bolt support according to claim 1 system is characterized in that described anchor pole is the vertical muscle twisted steel anchor rod of the left-handed nothing of yield strength between 400MPa-500MPa.
3. a kind of bolt support according to claim 2 system is characterized in that the array pitch between the described anchor pole is 900mm.
4. a kind of bolt support according to claim 3 system is characterized in that described top board is provided with 5 described anchor poles.
5. a kind of bolt support according to claim 4 system is characterized in that described anchor pole is that rupture pull force is the anchor pole of 304KN.
6. a kind of bolt support according to claim 5 system is characterized in that, described anchor cable is that 21.98mm, elongation per unit length are 7%, rupture pull force is the steel wire twisted wire single-point anchor cable of 607KN for adopting diameter.
7. a kind of bolt support according to claim 5 system is characterized in that, described anchor cable is that 17.8mm, elongation per unit length are 4%, rupture pull force is the steel wire twisted wire single-point anchor cable of 353KN for adopting diameter.
8. a kind of bolt support according to claim 1 system is characterized in that described anchor pole is that pre-fastening moment is the anchor pole of 400Nm.
9. a kind of bolt support according to claim 1 system is characterized in that described anchor cable and described lane group and top board junction are provided with the employing steel plate and make the arch anchor cable supporting plate that is of a size of 300mm * 300mm * 16mm.
CN 201320067494 2013-02-05 2013-02-05 Bolt support system Active CN203145954U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103758539A (en) * 2014-01-26 2014-04-30 河南大有能源股份有限公司常村煤矿 Steel belt for bolt-grouting supporting
CN104018848A (en) * 2014-06-21 2014-09-03 西安科技大学 Roof caving prevention and treatment method of rectangular roadway
CN105298521A (en) * 2015-11-17 2016-02-03 华北科技学院 Asymmetric supporting device for soft-rock gob-side roadway
CN105484757A (en) * 2015-12-18 2016-04-13 中国神华能源股份有限公司 Method and structure for treating bottom heaving of fully-mechanized mining face gate roadway
CN105484760A (en) * 2016-02-01 2016-04-13 四川川煤华荣能源股份有限公司花山煤矿 Forepoling structure of large-dip-angle coal face
CN106150526A (en) * 2016-08-31 2016-11-23 华北科技学院 A kind of roadway support device
CN106523003A (en) * 2016-09-27 2017-03-22 北京科技大学 Rigid-flexible coupling energy absorbing support technology suitable for deep mining roadway

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103758539A (en) * 2014-01-26 2014-04-30 河南大有能源股份有限公司常村煤矿 Steel belt for bolt-grouting supporting
CN104018848A (en) * 2014-06-21 2014-09-03 西安科技大学 Roof caving prevention and treatment method of rectangular roadway
CN104018848B (en) * 2014-06-21 2016-01-27 西安科技大学 A kind of rectangular shaped roadways roof collapse prevention and controls
CN105298521A (en) * 2015-11-17 2016-02-03 华北科技学院 Asymmetric supporting device for soft-rock gob-side roadway
CN105484757A (en) * 2015-12-18 2016-04-13 中国神华能源股份有限公司 Method and structure for treating bottom heaving of fully-mechanized mining face gate roadway
CN105484760A (en) * 2016-02-01 2016-04-13 四川川煤华荣能源股份有限公司花山煤矿 Forepoling structure of large-dip-angle coal face
CN105484760B (en) * 2016-02-01 2019-05-28 四川川煤华荣能源股份有限公司花山煤矿 Big angle coal face advance support structure
CN106150526A (en) * 2016-08-31 2016-11-23 华北科技学院 A kind of roadway support device
CN106523003A (en) * 2016-09-27 2017-03-22 北京科技大学 Rigid-flexible coupling energy absorbing support technology suitable for deep mining roadway

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