CN102200015A - Loose coal roadway supporting method - Google Patents

Loose coal roadway supporting method Download PDF

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Publication number
CN102200015A
CN102200015A CN201110079780XA CN201110079780A CN102200015A CN 102200015 A CN102200015 A CN 102200015A CN 201110079780X A CN201110079780X A CN 201110079780XA CN 201110079780 A CN201110079780 A CN 201110079780A CN 102200015 A CN102200015 A CN 102200015A
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CN
China
Prior art keywords
coal
loose
supporting
loose coal
roadway
Prior art date
Application number
CN201110079780XA
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Chinese (zh)
Inventor
刘利平
潘松山
安栓志
郭之理
黄淑红
Original Assignee
洛阳龙门煤业有限公司
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Publication date
Application filed by 洛阳龙门煤业有限公司 filed Critical 洛阳龙门煤业有限公司
Priority to CN201110079780XA priority Critical patent/CN102200015A/en
Publication of CN102200015A publication Critical patent/CN102200015A/en

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Abstract

The invention discloses a loose coal roadway supporting method. The method comprises the following steps of: spraying a layer of double-component chemical grout malisan N with thickness of 10 to 20 millimeters on the coal of two sides of a roadway respectively after the loose coal roadway is tunneled; and performing anchor rod driving and net hanging support by adopting a conventional anchor rod construction method after the double-component chemical grout malisan N is solidified and firmly combined with the coal. The method effectively controls coal leakage or side falling of a loose coal bed, is convenient for construction, low in cost and good in supporting effect, and greatly reduces the labor intensity of personnel.

Description

A kind of loose coal laneway support method

Technical field

The invention belongs to roadway support technical field under the coal mine, especially relate to a kind of loose coal laneway support method.

Background technology

At present, under coal mine, the most occurrence conditions in " three is soft " coal seam that the coal seam is soft, top board is soft, base plate is soft are poor, particularly some coal seam, coalfield is very loose, being Powdered tax deposits, f is between 0.1~0.5 for the hardness factor value, directly is the broken mud stone of thick-layer at most, and part location top board is broken oil shale of thick-layer and seam interlayer.The coal seam discloses the adhesion stress extreme difference of back coal, is loose Powdered, and finger pressure is promptly broken, coal group just comes off or wall caving when the driving supporting or before the supporting, tunnel coal group can't beat with conventional supporting method at all and annotate anchor pole and anchor cable, and therefore, shed shoring is generally adopted in existing roadway support.But shed shoring tunnelling speed is slow, and maintenance effects is poor, the cost height, and supporting intensity is low; Behind the frame canopy because roadway surrounding rock stress, particularly the tunnel side pressure is high, uncontrollable roadway deformation, have to repeatedly reprocess and drift section less, do not reach the quality specifications requirement.

Summary of the invention

For addressing the above problem, the purpose of this invention is to provide that a kind of method is simple, easy construction, cost is low, supporting effect is good loose coal laneway support method.

For achieving the above object, the present invention adopts following technical scheme:

A kind of loose coal laneway support method, after the loose coal tunnelling, two help to spray on the coal body the thick beautiful diffusing N of two-component chemical slurries horse of one deck 10mm ~ 20mm in the tunnel; Treat that the beautiful diffusing N of two-component chemical slurries horse solidifies, and after the coal body strong bonded, adopts conventional anchor rod construction method to play the supporting of anchor pole linked network.

The beautiful diffusing N of two-component chemical slurries horse is the poly-inferior glue fat material that is generated by resin and two kinds of composition reactions of catalyzer, is a kind of macromolecule polymeric material, has the initial setting time short (shortest time is 20 seconds), bonding force height, the characteristic of good springiness.During use, resin and catalyzer are annotated by pneumatic spray pump with the volume ratio of 1:1 and are spilt, and quick construction is simple.

The beautiful diffusing N slurries of horse just can reach higher set strength since initial set in tens seconds in three minutes, and slurries do not have shrinkage phenomenon when solidifying and can expand, and cohesive is very doughtily arranged after the curing, can combine with coal body securely.

For the loose coal tunnel, carry out the beautiful diffusing N spray-up of horse on the coal body surface, the surperficial coal body of fixed tunnel portion of group increases surperficial coal body survivability, and enough pretightning forces are arranged when making skyhook, improves the anchor bolt construction quality; Because the indivedual sections of loose coal seam coal road coal group are prone to the hole of collapsing when beating bolthole, can adopt the form of sleeve pipe to punch or annotate anchor pole.The beautiful diffusing N jetting thickness of horse is the best with 10mm~20mm.

The correlated performance of the beautiful diffusing N of two-component chemical slurries horse sees the following form shown in 1,2,3.

The beautiful diffusing N bicomponent material basic parameter of table 1 horse

Basis Resin Catalyzer Density (g/cm 3,25℃) 1.04 1.23 Viscosity (mPas, 25 ℃) 200 300 Mixed proportion (volume ratio) 1 1 Storage temperature (℃) 5~30 5~30

20 ℃ of shelf lifes (moon) 6 6

The beautiful diffusing N bicomponent material response data of table 2 horse

Polymerization product Response data in the time of 20 ℃ Begin reaction (min) 1 Finish reaction (min) 2 Expansion multiple 1~2 Bonding force (Mpa) >5

The beautiful diffusing N Material Physics mechanical property test data of table 3

Because adopt aforesaid technical scheme, the present invention has following superiority:

This loose coal laneway support method, it utilizes beautiful the loosing of two-component chemical slurries horse to solidify soon, solidify the characteristics that the back is flexible and intensity is big, controlled loose coal seam and leaked coal or wall caving phenomenon, avoided when pressurization anchor pole pallet, because coal mass strength is lower, along with pressurization increases, pallet pierces coal body, makes bolt pretension not reach the drawback of requirement, has filled up the vacancy that loose coal seam coal road can not adopt bolt support.

Tunnel cost height when adopting bolt support to avoid adopting shed shoring, the shortcoming that intensity is low, repair rate is high have been saved cost, and comparing with shed shoring economizes on the use of funds is 800 ~ 1500 yuan/m, also greatly reduces personnel's labour intensity simultaneously.

The specific embodiment

By following examples technical scheme of the present invention is described in further detail.

Adopt the distance of pneumatic pick driving (because the coal seam is too loose, need not to use to blow out and force coal breakage) row's anchor hole on the loose coal tunnel after, at first carry out temporary lining, temporary lining adopts forestope that the top board that exposes is carried out supporting more; Help at two coals that expose then and spray the thick beautiful diffusing N of two-component chemical slurries horse of one deck 10mm ~ 20mm with the surperficial coal body of fixed tunnel portion of group, in order to avoid coal or wall caving are leaked in loose coal seam; Adopt conventional anchor rod construction method to play the supporting of anchor pole linked network at last.

Conventional anchor rod construction method, concrete steps are: the anchor pole of selecting appropriate size according to the construction needs; Several anchor poles are packed in the anchor hole of back, and several anchor poles link together by steel band, linked network on anchor pole, and the anchor pole spacing is in time adjusted according to the country rock situation; Again several anchor poles are packed in the anchor hole that tunnel two helps into linked network on anchor pole; Check workmanship.

The anchor pole that back, two is helped is the high-strength resin anchor pole, adopts the anchoring of resin explosive roll lengthening.

Back adopts high-strength resin anchor pole, steel band, steel mesh reinforcement combined supporting, and high-strength resin anchor pole, steel band, two anti-net and steel mesh reinforcement combined supporting are helped to adopt in tunnel two.

Claims (1)

1. loose coal laneway support method is characterized in that: after the loose coal tunnelling, two help to spray on the coal body the thick beautiful diffusing N of two-component chemical slurries horse of one deck 10mm ~ 20mm in the tunnel; Treat that the beautiful diffusing N of two-component chemical slurries horse solidifies, and after the coal body strong bonded, adopts conventional anchor rod construction method to play the supporting of anchor pole linked network.
CN201110079780XA 2011-03-31 2011-03-31 Loose coal roadway supporting method CN102200015A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201110079780XA CN102200015A (en) 2011-03-31 2011-03-31 Loose coal roadway supporting method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201110079780XA CN102200015A (en) 2011-03-31 2011-03-31 Loose coal roadway supporting method

Publications (1)

Publication Number Publication Date
CN102200015A true CN102200015A (en) 2011-09-28

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102562089A (en) * 2011-12-23 2012-07-11 中国矿业大学 Method for ensuring supporting pre-tightening force of anchor rod for coal laneway
CN104564082A (en) * 2013-10-27 2015-04-29 中国石油化工集团公司 Petroleum drilling well wall reinforcing method
CN105569699A (en) * 2015-12-22 2016-05-11 大同煤矿集团有限责任公司 Inclined shaft development support technology for isolated coal pillar
CN105649661A (en) * 2016-03-16 2016-06-08 重庆工程职业技术学院 Rib spalling support method and structure in tunneling medium-thickness coal seam

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101725362A (en) * 2009-12-09 2010-06-09 中国矿业大学(北京) Composite support device of dynamic pressure softrock tunnel based on steel pipe concrete bracket
CN101864967A (en) * 2010-06-13 2010-10-20 中国矿业大学 Strengthening and reinforcing method of high-ground-pressure soft rock laneway by hierarchical grouting

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* Cited by examiner, † Cited by third party
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CN101725362A (en) * 2009-12-09 2010-06-09 中国矿业大学(北京) Composite support device of dynamic pressure softrock tunnel based on steel pipe concrete bracket
CN101864967A (en) * 2010-06-13 2010-10-20 中国矿业大学 Strengthening and reinforcing method of high-ground-pressure soft rock laneway by hierarchical grouting

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102562089A (en) * 2011-12-23 2012-07-11 中国矿业大学 Method for ensuring supporting pre-tightening force of anchor rod for coal laneway
CN104564082A (en) * 2013-10-27 2015-04-29 中国石油化工集团公司 Petroleum drilling well wall reinforcing method
CN104564082B (en) * 2013-10-27 2016-08-17 中国石油化工集团公司 A kind of oil drilling borehole wall reinforcement means
CN105569699A (en) * 2015-12-22 2016-05-11 大同煤矿集团有限责任公司 Inclined shaft development support technology for isolated coal pillar
CN105649661A (en) * 2016-03-16 2016-06-08 重庆工程职业技术学院 Rib spalling support method and structure in tunneling medium-thickness coal seam

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Application publication date: 20110928