CN102337925B - Method for enlarging, filling and supporting coal-pillar-free mining roadway for fully-mechanized top coal caving - Google Patents
Method for enlarging, filling and supporting coal-pillar-free mining roadway for fully-mechanized top coal caving Download PDFInfo
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- CN102337925B CN102337925B CN 201110254384 CN201110254384A CN102337925B CN 102337925 B CN102337925 B CN 102337925B CN 201110254384 CN201110254384 CN 201110254384 CN 201110254384 A CN201110254384 A CN 201110254384A CN 102337925 B CN102337925 B CN 102337925B
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Abstract
The invention relates to a method for enlarging, filling and supporting a coal-pillar-free mining roadway for fully-mechanized top coal caving, which comprises the following steps of: A, evenly mixing gravel and sand on a ground mixing plant; B, transferring the obtained mixture of the gravel and the sand, cement, flyash and additive to a storing part of an underground pump station; C, loading the materials in the step B to a mixer to be mixed evenly to obtain filling concrete; D, pumping the concrete obtained in the step C to a filling module, and filling along with the enlarging to ensure filling quality; E, forming a filling wall with an early strength in the filling module by the concrete, and demoulding after the filling wall reaches the supporting strength of a top plate; F, cleaning a filling pipeline, and pumping clean water to moisten the pipeline and test the pressure; and G, repeating the steps A-F until the filling is completed.
Description
Technical field
The present invention relates to a kind of for mining without the coal pillar mining supporting method, relate in particular to and a kind ofly for mining, without the coal pillar mining tunnel, expand side filling concrete wall supporting method.
Background technology
Without applying of coal pillar mining pattern, be to explore the important component part that realizes energy-saving and emission-reduction thought and implement the human survival strategy of sustainable development in current China's coal-mine production and construction, without the coal pillar mining technology, be an important research branch of " green exploitation ", be also that country's 12 plan emphasis are subsidized one of research direction simultaneously.The existing mine of China is subject to the protection pillar concentrated stress to affect unworkable adjacent coal seam reserves may to count in 10,000,000,000 tons, cause the serious wasting of resources.
At present national most of mining area still adopts traditional gob side entry driving method, between work plane, all stays the section fender of having established 2～5m or the wide coal column of 8～20m.Its objective is in order to prevent that production or preparation face and adjacent goaf from forming and leak out and cause the coal spontaneous combustion of leaving in goaf, preventive works face mine pressure causes district sublevel entry distortion, unstability, destruction.Although between the work plane section reserved coal pillar in a short time to preventing from leaking out, spontaneous fire, roof supporting play a role, but caused the waste of coal resources, and coal column is pressed shortcake at goaf side, even crushing, very easily cause the goaf Coal Pillar Spontaneous Combustion to get angry, safety in production is constituted a threat to.Therefore, realize that work plane is without coal pillar mining, there is very most important theories researching value and practice significance.
In the prior art, do not have complete expansion side filling and support process.Although the patents such as CN101372891B, CN101906979A, CN102011610A disclose multiple filling and support process method, but its processing step is simple, all can't be applied to expand the side supporting, and its filling wall do not have early powerful feature, be unfavorable for the recycling of mould.
Summary of the invention
For solving above-mentioned defect of the prior art, the invention provides and a kind ofly for mining, without the coal pillar mining gate road, expand side filling and support method, lower curtate is along filling wall digging laneway.Solve existing combining and put gob side entry driving waste coal resources, coal mining rate is low, the filling complicated construction technique, can not realize the problem that expands side, filling, the large deformation of support integratedization control country rock, destroys unstability, can eliminate the impact of coal column concentrated stress simultaneously, reduce the roadway maintenance cost, with expanding with filling, improve the operating efficiency without the coal pillar mining pattern.
For solving the problems of the technologies described above, the present invention includes:
A kind ofly for mining, without the coal pillar mining tunnel, expand side filling and support method, it comprises the following steps:
A, stone and sand are stirred at the ground agitator;
B, gained stone, sand mix and cement, flyash, early strength admixture in steps A are transported to pumping plant storing place, down-hole;
C, material material loading to mixer in step B is stirred, obtain the filling concrete;
D, gained concrete pump in step C is delivered to the filling mould, the filling mould is arranged in to section road entity coal side, described coal side constantly expands side, expand side after top board carry out the supporting of anchor rete cord with the coal side, help with filling the assurance filling quality with expansion;
E, concrete form in the filling mould has the early filling wall of epistasis energy, after the filling wall reaches top plate supporting intensity, carries out the demoulding;
F, cleaning filling pipeline, the pump clear water moistens the pipe pressure testing;
G, repeating step A-F, until filling is complete.
Material loading in step C adopts the bridge-type belt, and the bridge-type belt is fixed with playing cathead, plays cathead and coordinates turnbuckle and bridge-type belt reliably fixing with the 40T chain.
Described filling in step e side within the walls sets wooden prop and is added strong supporting, wooden prop spacing 0.7～1m.
Described filling in step e is the distance Sub-Level Caving not of side face end 6～8m within the walls, forms coal body-filling wall-emit caving coal and the common bearing structure of spoil compression body.
Described filling wall comprises the damper for forming of two face closures, and damper for forming is connected with grouting pipeline, and demoulding aftershaping baffle plate manually moves forward.
The moving step pitch of described artificial reach is 4～6m.
Step e also is included in work plane lower curtate crossheading along filling wall driving small section tunnel, meets lower curtate working face extraction needs.
Provided by the inventionly for mining, without the coal pillar mining tunnel, expand side filling and support method, by stone, sand stirs to obtain at the ground agitator and fills siccative, to fill siccative again, cement, flyash, additive (early strength admixture), water stirs at the underground filling station, along with the continuous expansion of filling section road entity coal side is helped, by the filling concrete, by the concrete filling pump, be delivered in the filling mould that lacks two sides, when the filling wall has some strength and after roof supporting effect a period of time, drag the filling mould by artificial or machinery, and constantly move forward with expanding side operation and packing job, realized expanding side, filling, support integratedization control, reduce colliery tradition gob side entry driving and stayed a large amount of loss of coal pillar of establishing, improved the rate of extraction, reduced the roof accident rate, and in coal is got angry short mine of phase, reduce goaf and left over coal, reduced the probability of goaf coal spontaneous combustion with dangerous, cancelled section coal pillar, liberated coal column and concentrated abutment pressure to affect coal seam, reduce lower curtate roadway support and maintenance cost, realized clean exploitation, with expanding, with filling, reduced filling cost, improved the operating efficiency without the coal pillar mining pattern.
The accompanying drawing explanation
Fig. 1 is the general flow chart of supporting method in the present invention;
Fig. 2 is that side filling schematic diagram is expanded in the tunnel of implementing supporting method in the present invention;
Fig. 3 is that the A-A section in the side filling is expanded in the tunnel of implementing supporting method in the present invention;
Fig. 4 is that the B-B section in the side filling is expanded in the tunnel of implementing supporting method in the present invention;
Fig. 5 is that the C-C section in the side filling is expanded in the tunnel of implementing supporting method in the present invention.
The specific embodiment
The invention provides and a kind ofly for mining, without the coal pillar mining tunnel, expand side filling and support method, clearer, clear and definite in order to make purpose of the present invention, technical scheme and advantage, below with reference to accompanying drawing, the present invention is described in more detail.
The invention provides and a kind ofly for mining, without the coal pillar mining tunnel, expand side filling and support method, stone, sand, cement, flyash, additive (early strength admixture) are added to the concrete filling material that water stirs and produces, by long distance pumping to the filling mould, with expanding with filling, expansion side, filling, support integratedization control technology have been realized, improved coal mining rate, reduce lower curtate and this section roadway maintenance cost, improved the operating efficiency of mining without the coal pillar mining pattern.As Fig. 1, to as shown in Fig. 6, mining provided by the invention expands side filling and support method without the coal pillar mining tunnel and mainly comprises the following steps:
A, the filling siccative that stone, sand are obtained in the ground stirring in proportion and cement, flyash, additive (early strength admixture) etc. are stored in being transported to storing place, down-hole;
B, gained filler in step a is delivered to mixer 1 stirs and obtain fill concrete;
In c, confined space that fill concrete is formed by grouting pump 2, transfer pipeline 3 to filling mould 4 and coal body;
Further, in above-mentioned lane side stowing operation, along with the continuous expansion of section road is helped, after filling wall 7 has some strength, reach filling mould 4, prepare for carrying out next filling circulation, stowing interval can be chosen 4～6m, with expanding with filling, reduced filling cost, improved the operating efficiency without the coal pillar mining pattern.
Further, fill mould and use special firm template, by steel, hook mutually and overlap, form the filling mould that lacks two sides, utilize post in an opposite direction to control form stable, the filling wall is not subject to work plane 9 to advance step pitch to affect, improve charging efficiency and the filling wall connects the top rate, facilitated workman's operation.
Further, above-mentioned lane helps stowboard to carry out the supporting of anchor guipure rope, after the expansion side, in time the coal side is carried out to the supporting of anchor rete cord, has guaranteed the safety of workman's operation.On the filling wall, damper for forming is set, damper for forming is connected with grouting pipeline, happier fill concrete is delivered to of grouting pump filled in mould, make up blind, improve charging efficiency, damper for forming can have two sides, be separately positioned on the scarce place, two sides of filling mould, in the moulding of filling wall, after the reach of filling mould, damper for forming can be moved forward, moving forward, step pitch is identical with stowing interval to be got final product.
Further, after the reach of filling baffle plate, in order to guarantee wall stability, in the inboard, tunnel, set wooden prop 8, an array pitch is controlled at 0.7～1m, prevents from damaging the filling concrete wall structure stable because leading or hysteresis bearing pressure cause the back large deformation;
Further, avoid in order to guarantee filled wall the impact that press on old top, controlling basic rimrock piece rotation sinks to touching cash stable, reduce the compressive deformation amount of filling wall, two of terminations Sub-Level Caving not during work plane 9 back production, two normal supports Sub-Level Caving not inwards successively, the distance of guaranteeing to have 6～8m is Sub-Level Caving not, forms coal body-filling wall-emit caving coal and the common bearing structure of spoil compression body.
In order further to set forth the present invention, as shown in Fig. 1 and Fig. 5, by stone, sand stirs and obtains siccative at the ground agitator, same cement, flyash, additive (early strength admixture) etc. is transported to storing place, down-hole, by belt filled to mixer 1, utilize filling pump 2, transfer pipeline 3 is delivered to filling mould 4, form filled wall 7 (shown in Fig. 4), constantly expanding and helping forward along with section road entity coal side, the filling wall has early epistasis energy, reach some strength, to a period of time after top board generation supporting role, carry out the demoulding, the reach of filling mould, moistened subsequently pump pressure testing (being the debugging of pump), carry out the filling of next circulation, section road adopts the supporting of anchor guipure rope, after expanding side, entity coal side is carried out to bolting with wire mesh in time, the filled wall inboard sets wooden prop 8 and carries out reinforce support, the distance of work plane 9 sides reservation 6～8m is Sub-Level Caving not, work plane is adopted the roof caving situation as Fig. 5, face timbering and advance support synchronously carry out in conjunction with actual conditions, the lower curtate tunnel is tunneled as Fig. 6 along body of wall, control section is long-pending, carry out light section pick lane, make tunnel in depressor area, and carry out the supporting of anchor guipure rope.
Should be understood that; above-mentioned comparatively detailed without the filling and support method description of coal pillar mining tunnel expansion side for mining; can not therefore think limiting the scope of the invention; those of ordinary skill in the art is under enlightenment of the present invention; do not breaking away from the scope situation that the claims in the present invention protect; can also make the various deformation such as replacement, simple combination; within these all fall into protection scope of the present invention, the scope of asking for protection of the present invention should be as the criterion with claims.
Claims (6)
1. one kind is expanded side filling and support method for mining without the coal pillar mining tunnel, and it comprises the following steps:
A, stone and sand are stirred at the ground agitator;
B, gained stone, sand mix and cement, flyash, early strength admixture in steps A are transported to pumping plant storing place, down-hole;
C, material material loading to mixer in step B is stirred, obtain the filling concrete;
D, gained concrete pump in step C is delivered in the confined space that filling mould and coal body form, the filling mould is arranged in to section road entity coal side, and described coal helps constantly to expand side, expands the rear top board of side and coal side and carries out the supporting of anchor rete cord, with expanding side with filling, guarantee filling quality;
E, concrete form in the filling mould has the early filling wall of epistasis energy, after the filling wall reaches top plate supporting intensity, carries out the demoulding;
F, cleaning filling pipeline, the pump clear water is moistened the pump pressure testing;
G, repeating step A-F, until filling is complete;
Wherein, the described filling in step e is the distance Sub-Level Caving not of side face end 6～8m within the walls, forms coal body-filling wall-emit caving coal and the common bearing structure of spoil compression body.
2. supporting method according to claim 1 is characterized in that: the material loading in step C adopts the bridge-type belt, and the bridge-type belt is fixed with playing a cathead, plays cathead and coordinates turnbuckle and bridge-type belt reliably to fix with the 40T chain.
3. supporting method according to claim 1 is characterized in that: the described filling in step e side within the walls sets wooden prop and is added strong supporting, wooden prop spacing 0.7～1m.
4. supporting method according to claim 1, it is characterized in that: described filling wall comprises the two sides damper for forming, and damper for forming is connected with grouting pipeline, demoulding aftershaping baffle plate manually moves forward.
5. supporting method according to claim 4, it is characterized in that: the moving step pitch of described artificial reach is 4～6m.
6. supporting method according to claim 1 is characterized in that: step e also is included in work plane lower curtate crossheading along filling wall driving small section tunnel, meets lower curtate working face extraction needs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110254384 CN102337925B (en) | 2011-08-31 | 2011-08-31 | Method for enlarging, filling and supporting coal-pillar-free mining roadway for fully-mechanized top coal caving |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110254384 CN102337925B (en) | 2011-08-31 | 2011-08-31 | Method for enlarging, filling and supporting coal-pillar-free mining roadway for fully-mechanized top coal caving |
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| CN102337925A CN102337925A (en) | 2012-02-01 |
| CN102337925B true CN102337925B (en) | 2013-12-25 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061770B (en) * | 2012-12-20 | 2015-10-21 | 大同煤矿集团有限责任公司 | Nearly interlamellar spacing tunnel gradation driving and supporting method |
| CN104251139B (en) * | 2013-06-26 | 2016-04-06 | 河南理工大学 | Coal-face Collapsed zone filling mining method |
| CN104695991A (en) * | 2015-03-20 | 2015-06-10 | 北京昊华能源股份有限公司 | Coal mine multiple seam bolting-grouting process |
| CN105481314B (en) * | 2015-12-01 | 2017-09-12 | 安徽理工大学 | Utilize the colliery Paste-like body filler and its preparation and fill method of building waste |
| CN105888683B (en) * | 2016-06-28 | 2018-01-02 | 安徽理工大学 | A kind of caved gangue method for cleaning based on slurry injection technique |
| CN111140280B (en) * | 2019-12-23 | 2021-04-13 | 太原理工大学 | Method for reinforcing and blocking water of gob-side roadway coal pillar slope pile-spraying concrete wall |
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| US3440824A (en) * | 1967-05-16 | 1969-04-29 | Thomas J Doolin | Method and apparatus for backfilling and underpinning an underground coal or ore mine |
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| CN101749020A (en) * | 2010-01-26 | 2010-06-23 | 淄博市王庄煤矿 | Forward coal mining by filling method |
| CN101906979A (en) * | 2009-06-08 | 2010-12-08 | 兖州煤业股份有限公司 | Gob-side road retaining supporting method and road-injecting slip mould |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6554368B2 (en) * | 2000-03-13 | 2003-04-29 | Oil Sands Underground Mining, Inc. | Method and system for mining hydrocarbon-containing materials |
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3440824A (en) * | 1967-05-16 | 1969-04-29 | Thomas J Doolin | Method and apparatus for backfilling and underpinning an underground coal or ore mine |
| CN101021153A (en) * | 2007-02-23 | 2007-08-22 | 中国矿业大学 | Waste filling thin coal seam tunnelling method |
| CN101117890A (en) * | 2007-08-17 | 2008-02-06 | 淮南矿业(集团)有限责任公司 | Gob-side entry retaining roadside support method |
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| CN101372891A (en) * | 2008-06-10 | 2009-02-25 | 沈阳市华祥矿山机械厂 | Strip filling integral backstopping coal mining method |
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