CN106837380A - Synchronous deep hole grouting method - Google Patents

Synchronous deep hole grouting method Download PDF

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Publication number
CN106837380A
CN106837380A CN201611223362.2A CN201611223362A CN106837380A CN 106837380 A CN106837380 A CN 106837380A CN 201611223362 A CN201611223362 A CN 201611223362A CN 106837380 A CN106837380 A CN 106837380A
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CN
China
Prior art keywords
grouting
drilling
hole
construction
mud
Prior art date
Application number
CN201611223362.2A
Other languages
Chinese (zh)
Inventor
杨文斌
田书龙
李文龙
胡红伟
王俊杰
曹建波
卢俊丰
曹雪芹
张丰杰
张鹤
Original Assignee
山西晋城无烟煤矿业集团有限责任公司
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Application filed by 山西晋城无烟煤矿业集团有限责任公司 filed Critical 山西晋城无烟煤矿业集团有限责任公司
Priority to CN201611223362.2A priority Critical patent/CN106837380A/en
Publication of CN106837380A publication Critical patent/CN106837380A/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/10Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor

Abstract

The present invention is specially a kind of synchronous deep hole grouting method, solves the problems, such as the defect that the presence of pre-grouting and lag grouting cannot overcome.Synchronous deep hole grouting method, is comprised the following steps, and drilling arrangement is determined in two crossheadings at 25 ~ 30m of working face, and drilling is arranged as two rows interlaced arrangement, and the spacing of wells is 10m, and hole depth is 60 ~ 100m;Drilling construction is carried out by the way of one-step pore-creating, after pore-forming, drilling rod is exited, guard aperture pipe is inserted;Mortar depositing construction, maximum grouting pressure is 15 ~ 20MPa, the single fluid grouting ratio of mud 0.6:1, the two fluid grouting ratio of mud is 0.8:1;Slip casting finishes rear sealing of hole, and sealed borehole length is more than or equal to 15m.Present invention process Rational Parameters, construction procedure is easy and effective, and preferably, wall caving generation area and height are smaller for the rib globality after construction, has good effect for the integrality for improving exceptions area coal body and the bearing capacity for improving coal body.

Description

Synchronous deep hole grouting method

Technical field

The present invention relates to the method for underground coal mine prevention work face roof fall, specially a kind of synchronous deep hole grouting method.

Background technology

Exploitation scale with China's coal-mine enterprise constantly expands, and working seam also gradually has superficial part to develop to deep, makes Working seam into most mines is changed into soft seam.Mine especially with fully mechanized mining back production is particularly easy to cause rib piece Side, roof cracking, the high-yield and high-efficiency of final influence mine.

In order to administer fully-mechanized mining working wall caving, many mines have all carried out multinomial research, current most common improvement wall caving Method be slip casting method, be divided into pre-grouting and lag grouting by the slip casting time.Pre-grouting technique is generally with inorganic material It is slurries, and inorganic material is more based on ordinary cement, the particle of ordinary cement is big and setting time is general more than 28 days, So pre-grouting technique is usually to carry out grouting and reinforcing to coal seam before the non-back production of working face;Lag grouting technique generally with Based on organic material, and organic material is more based on polyurethane material, the material because setting time is within a few minutes, typically Occur to carry out grouting and reinforcing to coal seam after wall caving occurs in working face.Pre-grouting technique is split when there is slip casting cycle long, slip casting The shortcomings of gap agensis, material solidification difference, to improving working face wall wall caving DeGrain;Lag grouting technique can have Effect improvement working face wall wall caving, but the shortcomings of presence influences work back production, slip casting is costly.

The content of the invention

The present invention is in order to solve the problems, such as the defect that the presence of pre-grouting and lag grouting cannot overcome, there is provided a kind of Synchronous deep hole grouting method.

The present invention adopts the following technical scheme that realization:Synchronous deep hole grouting method, comprises the following steps,

(1)Drilling arrangement is determined in two crossheadings at 25 ~ 30m of working face, drilling arrangement is divided into upper and lower two row hole drilling, bores Hole position of opening is two rows interlaced arrangement, and the spacing of wells is 10m, and hole depth is 60 ~ 100m;

(2)Drilling construction is carried out, is constructed by the way of one-step pore-creating, after pore-forming, exit drilling rod, insert guard aperture pipe, guard aperture Guan Zhi Footpath is 30mm, and injected hole is opened in the range of guard aperture pipe front end 20m;

(3)Mortar depositing construction is carried out using mining hydraulic grouting pump deep hole grouting, maximum grouting pressure is 15 ~ 20MPa, single fluid grouting The ratio of mud 0.6:1, the two fluid grouting ratio of mud is 0.8:1;

(4)Slip casting finishes rear sealing of hole, and sealed borehole length is more than or equal to 15m.

According to ahead work face bearing stress analysis of distribution, elasto-plastic range (elasto-plastic region) is the scope in 15 ~ 30 meters of working face front. As working face is constantly pushed ahead, elasto-plastic range (elasto-plastic region) will enter in the drilling for arranging successively in advance, and at this moment tissue carries out slip casting, Best results.With reference to face propulsion speed, synchronous grouting distance is designed as away from 25 ~ 30 meters of working face.

Beneficial effects of the present invention are as follows:Using rational synchronous grouting technological design, working face roof fall wall caving is realized Prevention.Present invention process Rational Parameters, construction procedure is easy and effective, and the rib globality after construction is preferable, wall caving generating region Domain and height are smaller, have good effect for the integrality for improving exceptions area coal body and the bearing capacity for improving coal body.

Specific embodiment

Synchronous deep hole grouting method, comprises the following steps,

(1)Drilling arrangement is determined in two crossheadings at 25 ~ 30m of working face, drilling arrangement is divided into upper and lower two row hole drilling, bores Hole position of opening is two rows interlaced arrangement, and the spacing of wells is 10m, and hole depth is 60 ~ 100m;

(2)Drilling construction is carried out, is constructed by the way of one-step pore-creating, after pore-forming, exit drilling rod, insert guard aperture pipe, guard aperture Guan Zhi Footpath is 30mm, and injected hole is opened in the range of guard aperture pipe front end 20m;

(3)Mortar depositing construction is carried out using mining hydraulic grouting pump deep hole grouting, maximum grouting pressure is 15 ~ 20MPa, single fluid grouting The ratio of mud 0.6:1, the two fluid grouting ratio of mud is 0.8:1;

(4)Slip casting finishes rear sealing of hole, and sealed borehole length is more than or equal to 15m.

In specific implementation process, using federal single fluid grouting material, federal single fluid grouting material is a kind of single to injecting paste material Liquid grout reinforcement material, has the advantages that the property noted strong, good fluidity, permeability be strong, caking property is good, consolidating strength and filling Rate is high, and gelling time is 45min≤t≤240min, 24h intensity up to more than 25MPa, 3d intensity up to more than 35MPa, finally Intensity is up to more than 50MPa.

Claims (1)

1. a kind of synchronous deep hole grouting method, it is characterised in that:Comprise the following steps,
(1)Drilling arrangement is determined in two crossheadings at 25 ~ 30m of working face, drilling arrangement is divided into upper and lower two row hole drilling, bores Hole position of opening is two rows interlaced arrangement, and the spacing of wells is 10m, and hole depth is 60 ~ 100m;
(2)Drilling construction is carried out, is constructed by the way of one-step pore-creating, after pore-forming, exit drilling rod, insert guard aperture pipe, guard aperture Guan Zhi Footpath is 30mm, and injected hole is opened in the range of guard aperture pipe front end 20m;
(3)Mortar depositing construction is carried out using mining hydraulic grouting pump deep hole grouting, maximum grouting pressure is 15 ~ 20MPa, single fluid grouting The ratio of mud 0.6:1, the two fluid grouting ratio of mud is 0.8:1;
(4)Slip casting finishes rear sealing of hole, and sealed borehole length is more than or equal to 15m.
CN201611223362.2A 2016-12-27 2016-12-27 Synchronous deep hole grouting method CN106837380A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611223362.2A CN106837380A (en) 2016-12-27 2016-12-27 Synchronous deep hole grouting method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611223362.2A CN106837380A (en) 2016-12-27 2016-12-27 Synchronous deep hole grouting method

Publications (1)

Publication Number Publication Date
CN106837380A true CN106837380A (en) 2017-06-13

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Family Applications (1)

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CN201611223362.2A CN106837380A (en) 2016-12-27 2016-12-27 Synchronous deep hole grouting method

Country Status (1)

Country Link
CN (1) CN106837380A (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102322262A (en) * 2011-09-12 2012-01-18 山东科技大学 Colliery isolated island coal column crossheading bump control method
CN102400698A (en) * 2010-09-17 2012-04-04 焦作煤业集团赵固(新乡)能源有限责任公司 Method for controlling rib spalling in double hard high-mining-height fully-mechanized mining face coal wall
CN102852532A (en) * 2012-10-09 2013-01-02 冀中能源股份有限公司东庞矿 Grouting method for preventing rib walk caving
CN102877857A (en) * 2012-09-24 2013-01-16 山西晋城无烟煤矿业集团有限责任公司 Deep hole pre-grouting top plate reinforcement method for large-mining height working face under special geological conditions
CN102877858A (en) * 2012-09-26 2013-01-16 安徽理工大学 Reinforcing method for crushed top plate of coal face
CN104088638A (en) * 2014-06-25 2014-10-08 西安科技大学 Steep coal seam long-wall large-mining height workface coal wall caving and roof caving control technique
CN104594914A (en) * 2014-08-18 2015-05-06 河南理工大学 Coal mine tunnel broken surrounding rock layering grouting technology and method
CN105909287A (en) * 2016-05-17 2016-08-31 河南理工大学 Deep hole grouting technology and method at advanced abutment pressure region for comprehensive mining work surface of coal mine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102400698A (en) * 2010-09-17 2012-04-04 焦作煤业集团赵固(新乡)能源有限责任公司 Method for controlling rib spalling in double hard high-mining-height fully-mechanized mining face coal wall
CN102322262A (en) * 2011-09-12 2012-01-18 山东科技大学 Colliery isolated island coal column crossheading bump control method
CN102877857A (en) * 2012-09-24 2013-01-16 山西晋城无烟煤矿业集团有限责任公司 Deep hole pre-grouting top plate reinforcement method for large-mining height working face under special geological conditions
CN102877858A (en) * 2012-09-26 2013-01-16 安徽理工大学 Reinforcing method for crushed top plate of coal face
CN102852532A (en) * 2012-10-09 2013-01-02 冀中能源股份有限公司东庞矿 Grouting method for preventing rib walk caving
CN104088638A (en) * 2014-06-25 2014-10-08 西安科技大学 Steep coal seam long-wall large-mining height workface coal wall caving and roof caving control technique
CN104594914A (en) * 2014-08-18 2015-05-06 河南理工大学 Coal mine tunnel broken surrounding rock layering grouting technology and method
CN105909287A (en) * 2016-05-17 2016-08-31 河南理工大学 Deep hole grouting technology and method at advanced abutment pressure region for comprehensive mining work surface of coal mine

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Application publication date: 20170613

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