CN101117890A - Method of support along spatially keeping lane - Google Patents

Method of support along spatially keeping lane Download PDF

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Publication number
CN101117890A
CN101117890A CNA2007100260969A CN200710026096A CN101117890A CN 101117890 A CN101117890 A CN 101117890A CN A2007100260969 A CNA2007100260969 A CN A2007100260969A CN 200710026096 A CN200710026096 A CN 200710026096A CN 101117890 A CN101117890 A CN 101117890A
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China
Prior art keywords
lane
obturation
support along
water
compressive strength
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Granted
Application number
CNA2007100260969A
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Chinese (zh)
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CN100464057C (en
Inventor
袁亮
程桦
薛俊华
郑是立
孙全业
孙道胜
卢平
王春林
曹广勇
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COALMINE GAS CONTROL NATIONAL ENGINEERING INSTITUTE CENTER
Anhui University of Architecture
Huainan Mining Group Co Ltd
Original Assignee
COALMINE GAS CONTROL NATIONAL ENGINEERING INSTITUTE CENTER
Anhui University of Architecture
Huainan Mining Group Co Ltd
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Application filed by COALMINE GAS CONTROL NATIONAL ENGINEERING INSTITUTE CENTER, Anhui University of Architecture, Huainan Mining Group Co Ltd filed Critical COALMINE GAS CONTROL NATIONAL ENGINEERING INSTITUTE CENTER
Priority to CNB2007100260969A priority Critical patent/CN100464057C/en
Publication of CN101117890A publication Critical patent/CN101117890A/en
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Publication of CN100464057C publication Critical patent/CN100464057C/en
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Abstract

A method for supporting and protecting gob roadway walls built along the gob road-way is characterized in that the filling bodies of gob roadway walls are built along the working surface at the side of the goaf to establish a supporting and protecting belt for gob roadway walls. The method can effectively control the roof delamination of a direct roof and can timely cut off the roof and the lower basic roof and also can fill out goaf with the falling recrement, thereby reducing the bending of the basic roof, and the loading of the inner supporting and protecting structure and the deformation of the wall rock of the gob roadway, as well as keeping the stability of the gob roadway, meanwhile, the method also can seal the goaf, prevent air leaking and spontaneous combustion of coal, and avoid harmful air coming into the working area.

Description

Method of support along spatially keeping lane
Technical field
The present invention relates to be applied under the coal mine for keeping the stable supporting method of gob side entry retaining.
Background technology
The Anhui Huainan Mining Area is located in the innerland, East China, is the important coal energy base of China.Explored coal seam is soft low-permeable high gas layer, and the gas reserves reach 5,928 hundred million m 3
In order to carry out extraction for the free gas of desorb that the crack passage circle that formed by mining influence by the goaf overlying rock from mined bed and release layer is pooled in top, goaf and the annular fissure circle, it is to utilize gob side entry retaining to realize that the Y type ventilates, and is provided with the tendency mash gas pumping drilling in the district of release crack that a kind of method is arranged.The enforcement of this method, gob side entry retaining is basis and prerequisite, but, because gob side entry retaining will stand the strong influence of adopting for twice, roadway surrounding rock is movable violent, and the roadway maintenance difficulty is bigger, is difficult to keep the stability in tunnel with supporting in the lane merely, but, also do not have at present a kind of method of more capable effect.
Summary of the invention
The present invention is for avoiding above-mentioned existing in prior technology weak point, a kind of method of support along spatially keeping lane being provided.This supporting method can effectively be controlled the absciss layer on direct top and in time cut off directly top and the next basic top, the spoil filling in the goaf that falls that making collapses is closely knit, reduce the bending on basic top, reduce the suffered load of supporting in the lane and the distortion of roadway surrounding rock, the stability in maintenance tunnel.Simultaneously, can seal the goaf, prevent to leak out and the spontaneous fire of coal, avoid that pernicious gas enters the workspace in the goaf.
The technical scheme that technical solution problem of the present invention is adopted is:
The characteristics of method of support along spatially keeping lane of the present invention are to construct lane group obturation with work plane in place, goaf one side to form the roadside support band.
The characteristics of method of support along spatially keeping lane of the present invention also are:
The width of roadside support band is 1.5m-3.0m, highly for mining height, and be connected with direct top.
In the lane group obturation forming process, compressive strength was not less than 2.0MPa in one day, and compressive strength was not less than 4.0MPa in three days, and compressive strength was not less than 5.0MPa in seven days, and compressive strength was not less than 10.0MPa in 28 days.
The characteristics of method of support along spatially keeping lane of the present invention also are:
Described lane helps the material of obturation to be made up of cement, flyash, stone, sand, water and compound additive, and various composition consumptions are by weight:
Cement be 10-20 part, flyash be 7-40 part,
Stone is that 15-40 part, sand are that 15-25 part, water are 10-30 part;
The volume of compound additive active ingredient is the 0.5-2.0% of cement and flyash total amount by weight percentage.
Described compound additive consisting of by weight:
Water reducing agent is that 20-50 part, water-loss reducer are that 0-10 part, air entraining agent are that 0-5 part, early strength admixture are 50-80 part.In compound additive,
Water reducing agent is wooden calcium, naphthalene sulfonate formal or polycarboxylic acids;
Water-loss reducer is carboxymethyl cellulose or polyacrylamide;
Air entraining agent is colophonium pyrolytic polymer or lauryl sodium sulfate;
Early strength admixture is calcium chloride, sodium chloride, sodium sulphate or triethanolamine.
It is that each used material beyond dewatering is mixed on the ground that the characteristics of method of support along spatially keeping lane of the present invention also are to construct lane group obturation, with the packed or container down-hole pumping plant that is transported in bulk, with conveying worm, belt conveyor or chain mat machine material is delivered to underground filling stock bucket, in the underground filling pump, add entry again by required amount, stir after the filling pipeline is pumped in the filling mould, compound is closely knit from levelling in the filling mould, natural curing, treat that sclerosis forms form removal after the intensity, promptly gets obturation.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, the present invention constructs lane group obturation with work plane, immediate support top coal reaches directly top, guarantee that the top coal is with directly the top is not broken in the tunnel, avoid itself and old top, top absciss layer, and cut off the tunnel and lean on the top coal of goaf side and directly push up, effectively reduce the pressure that lane group obturation is born, kept stability of the roadway.
2, the present invention has realized the sealing to the goaf simultaneously, prevents to leak out and the spontaneous fire of coal, avoids that pernicious gas enters the workspace in the goaf.
3, the present invention's lane group obturation of constructing had both had enough intensity, had good contractibility again.
4, the present invention's lane group obturation of constructing adopts the long distance pumping construction, is fit to down-hole special construction condition.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Below by the specific embodiment, the invention will be further described in conjunction with the accompanying drawings
The specific embodiment
Referring to Fig. 1, to construct lane group obturation with work plane in place, goaf one side and form the roadside support band, the width of this roadside support band is 1.5m-3.0m, highly is mining height, is connected with direct top.
In concrete the enforcement, the material of lane group obturation is made up of cement, flyash, stone, sand, water and compound additive, and various composition consumptions are by weight:
Cement be 10-20 part, flyash be 7-40 part,
Stone is that 15-40 part, sand are that 15-25 part, water are 10-30 part;
The volume of compound additive active ingredient is the 0.5-2.0% of cement and flyash total amount by weight percentage.
Compound additive consisting of by weight:
Water reducing agent is that 20-50 part, water-loss reducer are that 0-10 part, air entraining agent are that 0-5 part, early strength admixture are 50-80 part.
Water reducing agent adopts wooden calcium, naphthalene sulfonate formal or polycarboxylic acids;
Water-loss reducer adopts carboxymethyl cellulose or polyacrylamide;
Air entraining agent adopts colophonium pyrolytic polymer or lauryl sodium sulfate;
Early strength admixture adopts calcium chloride, sodium chloride, sodium sulphate or triethanolamine.
Concrete construction is that each used material beyond dewatering is mixed on the ground, with the packed or container down-hole pumping plant that is transported in bulk, with conveying worm, belt conveyor or chain mat machine material is delivered to underground filling stock bucket, in the underground filling pump, add entry again by required amount, stir after the filling pipeline is pumped in the filling mould, compound is closely knit from levelling in the filling mould, natural curing, treat that sclerosis forms form removal after the intensity, promptly gets obturation.One day compressive strength of obturation is not less than 2.0MPa, and compressive strength was not less than 4.0MPa in three days, and compressive strength was not less than 5.0MPa in seven days, and compressive strength was not less than 10.0MPa in 28 days.
Referring to Fig. 1, the roadside support band that lane group obturation forms can effectively be controlled the absciss layer on direct top and in time cut off directly top and the next basic top, the spoil filling in the goaf that falls that making collapses is more closely knit, reduce bending, the sinking on basic top, thereby the suffered load of supporting and the distortion of roadway surrounding rock in the minimizing lane keep the stability in tunnel; Simultaneously, owing to seal the goaf in time, prevent to leak out and the spontaneous fire of coal, avoided that pernicious gas enters working space in the goaf.
In gob side entry retaining goaf top plate pressure relief district, for being subjected to the crack of mining influence formation to enclose the free gas of the desorb that is pooled in top, goaf and the annular fissure circle by the goaf overlying rock from mined bed and release layer, carry out extraction by the tendency boring that is arranged in the district of release crack in staying the lane, release crack district is positioned at the above absciss layer fissure zone of goaf top plate caving zone that Y type ventilation operation face return air stays the lane.
In concrete the enforcement, the material of lane group obturation can be implemented in the following manner.
Embodiment 1:
One, gets the raw materials ready
Cement, flyash, stone, Sha Heshui, various composition consumptions are by weight:
Cement is that 14 parts of flyash are 20 parts
Stone is that 28 parts of sand are that 22 parts of water are 16 parts
The volume of compound additive active ingredient is 1.3% of cement and flyash total amount by weight percentage.
The composition of used compound additive is by weight:
As the polycarboxylic acids of water reducing agent be 30 parts,
As the carboxymethyl cellulose of water-loss reducer be 1.5 parts,
As the colophonium pyrolytic polymer of air entraining agent be 1.2 parts,
Calcium chloride as early strength admixture is 67.3 parts.
Used cement, flyash, stone, sand are:
Cement: P.O42.5 level, flyash: II level, stone: maximum particle diameter: 6mm, sand: medium sand.
Two, work progress
Cement, flyash, stone, sand and compound additive mix in ground, with the packed or special container down-hole pumping plant that is transported in bulk, with belt conveyor or chain mat machine material is delivered to the delivery pump hopper, add in delivery pump that water stirs after conveyance conduit is pumped in the filling mould, it is closely knit from levelling in the filling mould newly to mix compound, natural curing, form removal after the certain intensity of generation of waiting to harden promptly gets obturation.
Three, properties of product:
1, newly mixing the compound slump is 210mm, realizes that the pumping distance is 750m, is pumped into self-compaction behind the mould.
2, one day compressive strength is 3.8MPa, and three days compressive strength is 7.8MPa, and seven days compressive strength is 10.3MPa, and 28 days compressive strength is 17.4MPa.
3, residual strength is 51.5% of a ultimate compressive strength.
Embodiment 2:
One, batching
Cement, flyash, stone, Sha Heshui, various composition consumptions are by weight:
Cement is that 20 parts of flyash are 7 parts
Stone is that 40 parts of sand are that 20 parts of water are 13 parts
The volume of compound additive active ingredient is 1.6% of cement and flyash total amount by weight percentage.
The composition of used compound additive is by weight percentage:
As the polycarboxylic acids of water reducing agent be 30 parts,
As the carboxymethyl cellulose of water-loss reducer be 1.5 parts,
As the colophonium pyrolytic polymer of air entraining agent be 1.2 parts,
Calcium chloride as early strength admixture is 67.3 parts.
Used cement, flyash, stone, sand are:
Cement: P.O42.5 level, flyash: II level, stone: maximum particle diameter: 6mm, sand: medium sand
Two, work progress is with embodiment 1
Three, properties of product:
1, newly mixing the compound slump is 220mm, realizes that the pumping distance is 550m, is pumped into self-compaction behind the mould.
2, one day compressive strength is 9.8MPa, and three days compressive strength is 15.6MPa, and seven days compressive strength is 21.5MPa, and 28 days compressive strength is 37.0MPa.
3, residual strength is 36.6% of a ultimate compressive strength.
Embodiment 3:
One, gets the raw materials ready
Cement, flyash, stone, Sha Heshui, various composition consumptions are by weight:
Cement is that 10 parts of flyash are 40 parts
Stone is that 15 parts of sand are that 15 parts of water are 20 parts
The volume of compound additive active ingredient is 1.5% of cement and flyash total amount by weight percentage.
The composition of used compound additive is by weight:
As the polycarboxylic acids of water reducing agent be 30 parts,
As the carboxymethyl cellulose of water-loss reducer be 1.5 parts,
As the colophonium pyrolytic polymer of air entraining agent be 1.2 parts,
Calcium chloride as early strength admixture is 67.3 parts.
Used cement, flyash, stone, sand are respectively:
Cement: P.O42.5 level, flyash: II level, stone: maximum particle diameter: 6mm, sand: medium sand
Two, work progress is with embodiment 1
Three, properties of product:
1, newly mixing the compound slump is 250mm, realizes that the pumping distance is 2000m, is pumped into self-compaction behind the mould.
2, one day compressive strength is 2.3MPa, and three days compressive strength is 4.2MPa, and seven days compressive strength is 5.4MPa, and 28 days compressive strength is 10.5MPa.
3, residual strength is 62.5% of a ultimate compressive strength.
Increase the consumption of cement and stone, the intensity of material increases, and compressibility reduces;
Increase flyash and air entraining agent consumption, but pumping apart from increase, the strength of materials reduces, compressibility strengthens.
In addition, in concrete the enforcement, compound additive composition by weight also can be:
Water reducing agent Water-loss reducer Air entraining agent Early strength admixture
??1 ??50 ??0 ??0 ??50
??2 ??20 ??0 ??3.5 ??76.5
??3 ??40 ??5.5 ??0 ??54.5
??4 ??35 ??2.4 ??2.6 ??60
The concrete application of last table compound additive is: when the pumping distance more in short-term, can adopt prescription 1; When 1 day, 3 days early strength is had relatively high expectations, can adopt prescription 2; When pumping distance and requirement of strength are when medium, can adopt prescription 3; When the pumping distance is big, when requirement of strength is medium, can adopt prescription 4.

Claims (6)

1. a method of support along spatially keeping lane is characterized in that constructing lane group obturation with work plane in place, goaf one side forms the roadside support band.
2. method of support along spatially keeping lane according to claim 1 is characterized in that described roadside support band, and its width is 1.5m-3.0m; It highly is a mining height, is connected with direct top.
3. method of support along spatially keeping lane according to claim 1, it is characterized in that compressive strength was not less than 2.0MPa in one day in the described lane group obturation forming process, compressive strength was not less than 4.0MPa in three days, compressive strength was not less than 5.0MPa in seven days, and compressive strength was not less than 10.0MPa in 28 days.
4. method of support along spatially keeping lane according to claim 1 is characterized in that the material of described lane group obturation is made up of cement, flyash, stone, sand, water and compound additive, and various composition consumptions are by weight:
Cement be 10-20 part, flyash be 7-40 part,
Stone is that 15-40 part, sand are that 15-25 part, water are 10-30 part;
The volume of compound additive active ingredient is the 0.5-2.0% of cement and flyash total amount by weight percentage.
Described compound additive consisting of by weight:
Water reducing agent is that 20-50 part, water-loss reducer are that 0-10 part, air entraining agent are that 0-5 part, early strength admixture are 50-80 part.
5. method of support along spatially keeping lane according to claim 4 is characterized in that in the described compound additive,
Water reducing agent is wooden calcium, naphthalene sulfonate formal or polycarboxylic acids;
Water-loss reducer is carboxymethyl cellulose or polyacrylamide;
Air entraining agent is colophonium pyrolytic polymer or lauryl sodium sulfate;
Early strength admixture is calcium chloride, sodium chloride, sodium sulphate or triethanolamine.
6. method of support along spatially keeping lane according to claim 5, it is characterized in that the described lane group obturation of constructing is that each used material mixes on the ground with dewatering in addition, with the packed or container down-hole pumping plant that is transported in bulk, with conveying worm, belt conveyor or chain mat machine material is delivered to underground filling stock bucket, in the underground filling pump, add entry again by required amount, stir after the filling pipeline is pumped in the filling mould, compound is closely knit from levelling in the filling mould, natural curing, treat that sclerosis forms form removal after the intensity, promptly gets obturation.
CNB2007100260969A 2007-08-17 2007-08-17 Method of support along spatially keeping lane Active CN100464057C (en)

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101858215A (en) * 2010-04-30 2010-10-13 河南理工大学 Road retained method for extrusion molding of waste rock
CN101871353A (en) * 2010-06-22 2010-10-27 宋彦波 Method for soft rock roadway grouting and full-length prestress baseboard anchor cable comprehensive support
CN101519977B (en) * 2009-03-28 2011-05-11 中国矿业大学 Method for fixing gob-side entry retaining roadside packing body on coal seam with big inclined angle
CN102146797A (en) * 2011-01-21 2011-08-10 中国矿业大学 Short-section temporary gob-side entry retaining method
CN101725368B (en) * 2009-11-28 2011-08-17 山东科技大学 Thick seam large mining height working face gob-side entry retaining method
CN102182498A (en) * 2011-03-23 2011-09-14 彬县水帘洞煤炭有限责任公司 Comprehensive laneway-supporting method for cracked area in coal mine
CN102337925A (en) * 2011-08-31 2012-02-01 山东科技大学 Method for enlarging, filling and supporting coal-pillar-free mining roadway for fully-mechanized top coal caving
CN101906979B (en) * 2009-06-08 2012-02-22 兖州煤业股份有限公司 Gob-side road retaining supporting method and road-injecting slip mould
CN102661144A (en) * 2012-04-28 2012-09-12 山东科技大学 Method for determining anchoring depth of anchor cable along deep lane wall of empty crossheading entity coal side
CN103216236A (en) * 2013-03-13 2013-07-24 中国矿业大学(北京) Method for reducing subsidence of stope overburden bed separation by grouting
CN103321642A (en) * 2013-05-06 2013-09-25 中国矿业大学 Gob-side entry retaining adjoining rock stabilizing method based on lateral rock formation pre-splitting control
CN103334772A (en) * 2013-07-08 2013-10-02 中铁十四局集团有限公司 Slurry capable of stabilizing tunnel face of underground excavation sand layer, slurry preparation method, grouting equipment and grouting process
CN103557000A (en) * 2013-11-07 2014-02-05 北京科技大学 Method for preventing gob-side entry rock burst through side-drawing filling
CN104446115A (en) * 2014-11-18 2015-03-25 桂林华越环保科技有限公司 Concrete synergist
CN105254204A (en) * 2015-09-25 2016-01-20 广西壮族自治区水利科学研究院 Channel side slope cast in situ concrete composite additive and preparation method thereof
CN105293974A (en) * 2015-12-07 2016-02-03 广州大学 Concrete compound super early strength agent and use method thereof
CN106988744A (en) * 2017-04-05 2017-07-28 华北科技学院 " prop obturation " coordinates supporting gob-side entry retaining method by a kind of lane
CN108409260A (en) * 2018-05-31 2018-08-17 佛山市高明区爪和新材料科技有限公司 A kind of preparation method of coal mine consolidated fill slurry

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Publication number Priority date Publication date Assignee Title
CN101519977B (en) * 2009-03-28 2011-05-11 中国矿业大学 Method for fixing gob-side entry retaining roadside packing body on coal seam with big inclined angle
CN101906979B (en) * 2009-06-08 2012-02-22 兖州煤业股份有限公司 Gob-side road retaining supporting method and road-injecting slip mould
CN101725368B (en) * 2009-11-28 2011-08-17 山东科技大学 Thick seam large mining height working face gob-side entry retaining method
CN101858215B (en) * 2010-04-30 2012-10-03 河南理工大学 Road retained method for extrusion molding of waste rock
CN101858215A (en) * 2010-04-30 2010-10-13 河南理工大学 Road retained method for extrusion molding of waste rock
CN101871353A (en) * 2010-06-22 2010-10-27 宋彦波 Method for soft rock roadway grouting and full-length prestress baseboard anchor cable comprehensive support
CN101871353B (en) * 2010-06-22 2013-06-19 河北同成科技股份有限公司 Method for soft rock roadway grouting and full-length prestress baseboard anchor cable comprehensive support
CN102146797A (en) * 2011-01-21 2011-08-10 中国矿业大学 Short-section temporary gob-side entry retaining method
CN102182498A (en) * 2011-03-23 2011-09-14 彬县水帘洞煤炭有限责任公司 Comprehensive laneway-supporting method for cracked area in coal mine
CN102337925B (en) * 2011-08-31 2013-12-25 山东科技大学 Method for enlarging, filling and supporting coal-pillar-free mining roadway for fully-mechanized top coal caving
CN102337925A (en) * 2011-08-31 2012-02-01 山东科技大学 Method for enlarging, filling and supporting coal-pillar-free mining roadway for fully-mechanized top coal caving
CN102661144B (en) * 2012-04-28 2014-12-10 山东科技大学 Method for determining anchoring depth of anchor cable along deep lane wall of empty crossheading entity coal side
CN102661144A (en) * 2012-04-28 2012-09-12 山东科技大学 Method for determining anchoring depth of anchor cable along deep lane wall of empty crossheading entity coal side
CN103216236B (en) * 2013-03-13 2015-05-06 中国矿业大学(北京) Method for reducing subsidence of stope overburden bed separation by grouting
CN103216236A (en) * 2013-03-13 2013-07-24 中国矿业大学(北京) Method for reducing subsidence of stope overburden bed separation by grouting
CN103321642B (en) * 2013-05-06 2015-03-11 中国矿业大学 Gob-side entry retaining adjoining rock stabilizing method based on lateral rock formation pre-splitting control
CN103321642A (en) * 2013-05-06 2013-09-25 中国矿业大学 Gob-side entry retaining adjoining rock stabilizing method based on lateral rock formation pre-splitting control
CN103334772A (en) * 2013-07-08 2013-10-02 中铁十四局集团有限公司 Slurry capable of stabilizing tunnel face of underground excavation sand layer, slurry preparation method, grouting equipment and grouting process
CN103557000A (en) * 2013-11-07 2014-02-05 北京科技大学 Method for preventing gob-side entry rock burst through side-drawing filling
CN103557000B (en) * 2013-11-07 2015-07-15 北京科技大学 Method for preventing gob-side entry rock burst through side-drawing filling
CN104446115A (en) * 2014-11-18 2015-03-25 桂林华越环保科技有限公司 Concrete synergist
CN105254204A (en) * 2015-09-25 2016-01-20 广西壮族自治区水利科学研究院 Channel side slope cast in situ concrete composite additive and preparation method thereof
CN105293974A (en) * 2015-12-07 2016-02-03 广州大学 Concrete compound super early strength agent and use method thereof
CN106988744A (en) * 2017-04-05 2017-07-28 华北科技学院 " prop obturation " coordinates supporting gob-side entry retaining method by a kind of lane
CN108409260A (en) * 2018-05-31 2018-08-17 佛山市高明区爪和新材料科技有限公司 A kind of preparation method of coal mine consolidated fill slurry

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