CN103603675A - Supporting method of permeable soft broken rock stratum roadway - Google Patents
Supporting method of permeable soft broken rock stratum roadway Download PDFInfo
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- CN103603675A CN103603675A CN201310427667.5A CN201310427667A CN103603675A CN 103603675 A CN103603675 A CN 103603675A CN 201310427667 A CN201310427667 A CN 201310427667A CN 103603675 A CN103603675 A CN 103603675A
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Abstract
The invention relates to a supporting method of a roadway in a coal mime, particularly to a supporting method of a permeable soft broken rock stratum roadway. The supporting method aims at solving the problems that soft broken rock stratum roadways especially permeable soft broken rock stratum roadways are poor in supporting effect, high in cost and the like. The supporting method comprises the steps of first concrete spraying; combined support through high strength deformed steel bar anchor rods and diamond metal nets; anchor cable installation; secondary concrete spraying; installation of chemical pulp grouting anchor rods; installation of cement slurry grouting anchor rods.
Description
Technical field
The present invention relates to the supporting method in tunnel in colliery, be specially a kind of supporting method of the tunnel, soft broken rock stratum of seeping water.
Background technology
China's coal-mine underground mining level was progressively toward deep deepening in the last few years, geological conditions also from simple to complex, rock crack and fault tectonic are also more and more many, and mine ground is pressed and horizontal direction geostatic stress obviously increases, the impact of flood in addition, make the rock mass of these beddings, joint, cranny development under groundwater erosion, rock mass weakens, and bulk strength and stability greatly reduce, roadway surrounding rock self-supporting ability step-down, roadway deformation amount strengthens, and the distortion duration lengthens.Under this kind of condition, in infiltration soft broken rock stratum, carry out roadway support, maintain the stable of tunnel and operation interval and all seem extremely difficult.
For solving a roadway support difficult problem in Soft and Cracked Rocks, once adopted U-shaped steel compressibile support to add shotcrete support, this support pattern has utilized U-shaped steel compressibile support and concrete spray coating to allow the feature of the appropriate distortion of country rock fully, while losing by U-shaped steel bracket contractibility, still can become the characteristic of rigid protection, contained preferably deformation of the surrounding rock in tunnel, but still cannot solve for the impact of roadway surrounding rock infiltration effect.
Low for infiltration soft broken rock gangway self, the feature that deformation of the surrounding rock in tunnel amount is large, the many collieries of China often adopt slip casting-anchor net spray supporting, by play anchor pole slip casting in rock stratum, this kind of method improves the globality of rock mass strength and country rock body within the specific limits, and the flexible association that utilizes wire lath and whitewashing to form plays the effect of compensator or trimmer pressure to a certain extent.But for the broken rock gangway of infiltration, this class methods sealing effect is not too obvious, and single injection chemical pulp expends too high.Therefore for infiltration soft broken Rock Workings Support, still there is defect in this type of supporting method technically and economically.
Summary of the invention
Not good in order to solve tunnel, the soft broken rock stratum soft broken rock stratum supporting effect of roadway that particularly seeps water, expend the problems such as larger, the present invention proposes a kind of infiltration soft broken rock stratum laneway support method.
The present invention adopts following steps to realize:
After A, tunnel blasting, tap, carry out just pneumatically placed concrete operation, jetting thickness 20～30mm;
B, employing high-strength screw-thread steel anchor pole add diamond mesh combined supporting, bolt diameter is 20mm, length is 2500mm, adopt resin anchoring agent end anchor, anchorage length is 1400mm, the high-strength screw-thread steel anchor pole axial deviation being positioned on drift section is no more than 10 °, and every row and every row high-strength screw-thread steel anchor pole end are fixed respectively a waste steel wire rope, clamping diamond mesh between wire rope;
C, in tunnel, anchor cable is played in the position of 45 ° of positive top, arch, tunnel and vertical curve angles, and every row has three anchor cables, and anchor cable axial deviation is in 20 °, and first row anchor cable is between first row and second row high-strength screw-thread steel anchor pole;
D, for preventing top layer spillage, before slip casting, carry out secondary and spray again, jetting thickness 30～50mm, can partly cover anchor pole;
E, adopt long 1500mm, the chemical pulp grouted anchor bar that the seamless steel pipe of diameter 22mm is made is reinforced, it is loose that chemical pulp grouted anchor bar is used for injecting novel water shutoff material horsepower, arrange with high-strength screw-thread steel anchor pole interval, and in roadway floor left and right edges position, set up two base angle chemical pulp grouted anchor bars, wherein, be positioned at the chemical pulp grouted anchor bar axial deviation that tunnel vault and two helps and be no more than 15 °, at the chemical pulp grouted anchor bar axial deviation of roadway floor between 35 ° to 50 °, first row chemical pulp grouted anchor bar is between first row and second row high-strength screw-thread steel anchor pole,
The cement paste grouted anchor bar that the seamless steel pipe of F, employing long 2500mm, diameter 22mm is made is reinforced, the cement paste grouted anchor bar axial deviation being positioned on drift section is no more than 15 °, cement paste grouted anchor bar and chemical pulp grouted anchor bar interval are arranged, first row cement paste grouted anchor bar is between first row and second row chemical pulp grouted anchor bar, and grouting amount is as the criterion not there are not a large amount of running pulps.
Further, described high-strength screw-thread steel bolt interval is 800mm.
Further, described anchor cable array pitch 3200mm.
Further, between described chemical pulp grouted anchor bar and cement paste grouted anchor bar, array pitch is 1600mm.
The present invention's soft broken rock stratum laneway support method that seeps water, its beneficial effect is:
Utilize anchor pole, whitewashing, anchor cable, slip casting many integration, combined supporting, effectively controlled surrouding rock deformation, the grouted anchor bar interval of not waiting by two kinds of length is arranged, reasonable distribution chemical grouting and cement injection, effectively sealing and reinforce adjoining rock, reduce the impact of flood on rock mass and anchoring body character greatly.The present invention program's supporting effect is good, Rational Parameters, has the features such as support cost is low, reliable in quality, strong adaptability simultaneously, and the roadway support of soft broken rock stratum is specially adapted to seep water.
Below in conjunction with accompanying drawing, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is layout section structure schematic diagram of the present invention;
Fig. 2 is layout plan structure schematic diagram of the present invention;
In figure: 1--high-strength screw-thread steel anchor pole; 2--anchor cable; 3--cement paste grouted anchor bar; 4--chemical pulp grouted anchor bar; 5--first spray-up; 6-wire lath; 7-multiple spray-up; 8-wire rope.
The specific embodiment
The present invention's soft broken rock stratum laneway support method that seeps water, comprises the steps:
After A, tunnel blasting, tap, prevent that unconsolidated rock from falling down and injure constructor by a crashing object, carry out just pneumatically placed concrete operation, first spray-up 5 thickness 20～30mm.
B, employing high-strength screw-thread steel anchor pole 1 add diamond mesh 6 combined supportings, bolt diameter is 20mm, length is 2500mm, adopt resin anchoring agent end anchor, anchorage length is 1400mm, 1 array pitch of high-strength screw-thread steel anchor pole is 800mm, high-strength screw-thread steel anchor pole 1 axial deviation (being the angle of high-strength screw-thread steel anchor pole 1 axis and this anchor pole 1 end section normal) being positioned on drift section is no more than 10 °, every row and every row high-strength screw-thread steel anchor pole 1 end are fixed respectively a waste steel wire rope 8, clamping diamond mesh 6 between wire rope 8.
C, installation anchor cable.In tunnel, anchor cable 2 is played in positive top, arch, tunnel and 45 ° of positions of vertical curve angle, every row has three anchor cables, anchor cable array pitch 3200mm, first row anchor cable, between first row and second row high-strength screw-thread steel anchor pole, guarantees in installation process that the axial deviation of anchor cable is in 20 °.
D, secondary spray again.For preventing rock mass top layer spillage, before slip casting, carry out secondary and spray again, spray-up 7 thickness 30～50mm, can partly cover anchor pole 1.
E, installation chemical pulp grouted anchor bar 4.Adopt the chemical pulp grouted anchor bar 4 of the seamless steel pipe making of long 1500mm, diameter 22mm to reinforce, this anchor pole 4 is loose for injecting novel water shutoff material horsepower, 4 array pitch 1600mm of grouted anchor bar, arrange with high-strength screw-thread steel anchor pole 1 interval, and in roadway floor left and right edges position, set up two base angle chemical pulp grouted anchor bars 4, the axial deviation of this anchor pole is between 35 ° to 50 °, and other chemical pulp grouted anchor bar 4 axial deviations of drift section are controlled in 15 °, first row chemical pulp grouted anchor bar 4 is between first row and second row high-strength screw-thread steel anchor pole 1.
F, installation cement paste grouted anchor bar 3.Adopt the cement paste grouted anchor bar 3 of the seamless steel pipe making of long 2500mm, diameter 22mm to reinforce, array pitch 1600mm between this cement paste grouted anchor bar, cement paste grouted anchor bar 3 axial deviations that are positioned on drift section are no more than 15 °, this anchor pole 3 is arranged with chemical pulp grouted anchor bar 4 intervals, first row cement paste grouted anchor bar 3 is between first row and second row chemical pulp grouted anchor bar 4, and grouting amount is as the criterion not there are not a large amount of running pulps.
The present invention's soft broken rock stratum laneway support method that seeps water, its principle is:
1, on rock mass top layer, whitewash and lay the tensile strength that wire lath can strengthen spray-up, the association that spray-up and wire lath form has again certain flexibility, can play the effect of compensator or trimmer pressure.2, wire rope is connected into an integral body by high-strength screw-thread steel anchor pole, gives full play to the anchorage effect of anchor pole, improves largely the self-bearing capacity of rock mass.3,, by be staggered installation of chemical pulp grouted anchor bar different in size and cement paste grouted anchor bar on tunnel, give full play to the grid cementation that chemical pulp produces rock mass water blockoff envelope rock effect and the cement paste in crack, rock mass top layer.
Above-described embodiment is described the preferred embodiment of the present invention; not scope of the present invention is limited; design under the prerequisite of spirit not departing from the present invention; various distortion and improvement that those of ordinary skills make the technical scheme of invention, all should fall in the definite protection domain of claim of the present invention.
Claims (1)
1. the present invention's soft broken rock stratum laneway support method that seeps water, comprises the steps:
After A, tunnel blasting, tap, carry out just pneumatically placed concrete operation, jetting thickness 20～30mm;
B, employing high-strength screw-thread steel anchor pole add diamond mesh combined supporting, bolt diameter is 20mm, length is 2500mm, adopt resin anchoring agent end anchor, anchorage length is 1400mm, the high-strength screw-thread steel anchor pole axial deviation being positioned on drift section is no more than 10 °, and every row and every row high-strength screw-thread steel anchor pole end are fixed respectively a waste steel wire rope, clamping diamond mesh between wire rope;
C, in tunnel, anchor cable is played in the position of 45 ° of positive top, arch, tunnel and vertical curve angles, and every row has three anchor cables, and anchor cable axial deviation is in 20 °, and first row anchor cable is between first row and second row high-strength screw-thread steel anchor pole;
D, for preventing top layer spillage, before slip casting, carry out secondary and spray again, jetting thickness 30～50mm, can partly cover anchor pole;
E, adopt long 1500mm, the chemical pulp grouted anchor bar that the seamless steel pipe of diameter 22mm is made is reinforced, it is loose that chemical pulp grouted anchor bar is used for injecting novel water shutoff material horsepower, arrange with high-strength screw-thread steel anchor pole interval, and in roadway floor left and right edges position, set up two base angle chemical pulp grouted anchor bars, wherein, be positioned at the chemical pulp grouted anchor bar axial deviation that tunnel vault and two helps and be no more than 15 °, at the chemical pulp grouted anchor bar axial deviation of roadway floor between 35 ° to 50 °, first row chemical pulp grouted anchor bar is between first row and second row high-strength screw-thread steel anchor pole,
The cement paste grouted anchor bar that the seamless steel pipe of F, employing long 2500mm, diameter 22mm is made is reinforced, the cement paste grouted anchor bar axial deviation being positioned on drift section is no more than 15 °, cement paste grouted anchor bar and chemical pulp grouted anchor bar interval are arranged, first row cement paste grouted anchor bar is between first row and second row chemical pulp grouted anchor bar, and grouting amount is as the criterion not there are not a large amount of running pulps.
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899331A (en) * | 2014-04-23 | 2014-07-02 | 中国矿业大学(北京) | Excavation roadway distribution method of high-stress extrusion high seam caving coal mining |
| CN103899329A (en) * | 2014-03-24 | 2014-07-02 | 中国矿业大学 | Large-deformation broken surrounding rock roadway management method |
| CN104005417A (en) * | 2014-06-09 | 2014-08-27 | 中交一公局第一工程有限公司 | Construction method for high side slope of loosen and calaclastic rock |
| CN104533484A (en) * | 2014-12-24 | 2015-04-22 | 神华集团有限责任公司 | Roadway supporting method |
| CN105178981A (en) * | 2015-09-30 | 2015-12-23 | 中国矿业大学 | Total-section closed type deep-shallow coupling yielding, bolting-grouting and supporting method for incompact and fractured soft-rock roadway |
| CN105350993A (en) * | 2015-10-08 | 2016-02-24 | 河南理工大学 | Tunnel full-section anchor cable and beam injection combined supporting technology |
| CN105569672A (en) * | 2015-12-29 | 2016-05-11 | 大同煤矿集团有限责任公司 | Method for supporting machine head chamber of large-roadway adhesive tape conveying machine |
| CN105737697A (en) * | 2016-05-05 | 2016-07-06 | 武汉大学 | Contour blasting method for joint development rock masses |
| CN105804768A (en) * | 2016-03-25 | 2016-07-27 | 山东大学 | Method for preventing vault surrounding rock collapse through joint supporting of steel arch and steel pieces during tunnel excavation |
| CN106246202A (en) * | 2016-11-01 | 2016-12-21 | 何双龙 | A kind of loose weak country rock tunnel combined bolting and shotcrete structure and construction method |
| CN107035387A (en) * | 2016-12-12 | 2017-08-11 | 贵州理工学院 | A kind of roadway surrounding rock control method under the influence of strong dynamic pressure |
| CN108194100A (en) * | 2017-12-21 | 2018-06-22 | 山东科技大学 | A kind of accurate three-dimensional prestress strengthening method of crack coal and rock |
| CN108468553A (en) * | 2018-02-11 | 2018-08-31 | 贵州开磷建设集团有限公司 | The construction method for supporting of roadway in a kind of carbonaceous shale |
| CN110952998A (en) * | 2019-12-12 | 2020-04-03 | 湖北尧治河化工股份有限公司 | Supporting method for fault broken roof |
| CN111322097A (en) * | 2020-01-16 | 2020-06-23 | 湖北三鑫金铜股份有限公司 | Supporting method for coordinating deformation of surrounding rock of roadway |
| CN111691904A (en) * | 2020-06-17 | 2020-09-22 | 黄文忠 | Adjustable supporting net rack capable of keeping fit with inside of tunnel for coal mining |
| CN112576276A (en) * | 2020-11-18 | 2021-03-30 | 彬县水帘洞煤炭有限责任公司 | Rock coal supporting method based on loose rock coal seam grouting reinforcement |
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| CN102877858A (en) * | 2012-09-26 | 2013-01-16 | 安徽理工大学 | Reinforcing method for crushed top plate of coal face |
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| CN101852083A (en) * | 2010-04-16 | 2010-10-06 | 中国科学院武汉岩土力学研究所 | Quick supporting method for large-deformation roadway easy to fall, break and loosen and apparatus thereof |
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Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899329A (en) * | 2014-03-24 | 2014-07-02 | 中国矿业大学 | Large-deformation broken surrounding rock roadway management method |
| CN103899329B (en) * | 2014-03-24 | 2016-03-30 | 中国矿业大学 | A kind of administering method of large deformation breaking surrounding rock tunnel |
| CN103899331B (en) * | 2014-04-23 | 2016-10-26 | 中国矿业大学(北京) | Digging laneway method for arranging during heavily stressed prominent high seam top coal caving |
| CN103899331A (en) * | 2014-04-23 | 2014-07-02 | 中国矿业大学(北京) | Excavation roadway distribution method of high-stress extrusion high seam caving coal mining |
| CN104005417A (en) * | 2014-06-09 | 2014-08-27 | 中交一公局第一工程有限公司 | Construction method for high side slope of loosen and calaclastic rock |
| CN104533484A (en) * | 2014-12-24 | 2015-04-22 | 神华集团有限责任公司 | Roadway supporting method |
| CN105178981A (en) * | 2015-09-30 | 2015-12-23 | 中国矿业大学 | Total-section closed type deep-shallow coupling yielding, bolting-grouting and supporting method for incompact and fractured soft-rock roadway |
| CN105350993A (en) * | 2015-10-08 | 2016-02-24 | 河南理工大学 | Tunnel full-section anchor cable and beam injection combined supporting technology |
| CN105350993B (en) * | 2015-10-08 | 2017-12-12 | 河南理工大学 | A kind of roadway full-fracture-surfacanchoring-rod anchor cable beam spray Combined Support Technology |
| CN105569672A (en) * | 2015-12-29 | 2016-05-11 | 大同煤矿集团有限责任公司 | Method for supporting machine head chamber of large-roadway adhesive tape conveying machine |
| CN105804768A (en) * | 2016-03-25 | 2016-07-27 | 山东大学 | Method for preventing vault surrounding rock collapse through joint supporting of steel arch and steel pieces during tunnel excavation |
| CN105737697A (en) * | 2016-05-05 | 2016-07-06 | 武汉大学 | Contour blasting method for joint development rock masses |
| CN105737697B (en) * | 2016-05-05 | 2017-06-27 | 武汉大学 | A kind of outlining blasting method suitable for joints development rock mass |
| CN106246202A (en) * | 2016-11-01 | 2016-12-21 | 何双龙 | A kind of loose weak country rock tunnel combined bolting and shotcrete structure and construction method |
| CN107035387A (en) * | 2016-12-12 | 2017-08-11 | 贵州理工学院 | A kind of roadway surrounding rock control method under the influence of strong dynamic pressure |
| CN108194100A (en) * | 2017-12-21 | 2018-06-22 | 山东科技大学 | A kind of accurate three-dimensional prestress strengthening method of crack coal and rock |
| CN108468553A (en) * | 2018-02-11 | 2018-08-31 | 贵州开磷建设集团有限公司 | The construction method for supporting of roadway in a kind of carbonaceous shale |
| CN110952998A (en) * | 2019-12-12 | 2020-04-03 | 湖北尧治河化工股份有限公司 | Supporting method for fault broken roof |
| CN110952998B (en) * | 2019-12-12 | 2021-10-08 | 湖北尧治河化工股份有限公司 | Supporting method for fault broken roof |
| CN111322097A (en) * | 2020-01-16 | 2020-06-23 | 湖北三鑫金铜股份有限公司 | Supporting method for coordinating deformation of surrounding rock of roadway |
| CN111691904A (en) * | 2020-06-17 | 2020-09-22 | 黄文忠 | Adjustable supporting net rack capable of keeping fit with inside of tunnel for coal mining |
| CN112576276A (en) * | 2020-11-18 | 2021-03-30 | 彬县水帘洞煤炭有限责任公司 | Rock coal supporting method based on loose rock coal seam grouting reinforcement |
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Application publication date: 20140226 |