CN104100271A - Side-supporting roadway forming method by pre-digging guide cavern and filling with artificial side wall for secondary use - Google Patents
Side-supporting roadway forming method by pre-digging guide cavern and filling with artificial side wall for secondary use Download PDFInfo
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- CN104100271A CN104100271A CN201410300415.0A CN201410300415A CN104100271A CN 104100271 A CN104100271 A CN 104100271A CN 201410300415 A CN201410300415 A CN 201410300415A CN 104100271 A CN104100271 A CN 104100271A
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Abstract
The invention discloses a side-supporting roadway forming method by pre-digging a guide cavern and filling with an artificial side wall for secondary use. Firstly, the guide cavern is dug in advance before mining roadway construction, and filling is performed to form the artificial side wall; then mining roadways are constructed in sequence respectively along two sides of the artificial side wall, and are filled with the artificial side wall which serves as a side support of the two mining roadways for mining of two working faces. Compared with a gob-side entry retaining technology in existing coal pillar-free roadway protection technologies, the side-supporting roadway forming method has the advantages that the mining roadways are directly caved without maintenance, the percentage reduction of area is small, and the method is also applicable under the complex conditions such as high seam full-mechanized caving mining and deep-part high-stress seam mining; the pre-dug guide cavern is used for filling, during filling, two sides of the guide cavern are both solid coal, and two side templates are not needed during filling, so the process is simple and the construction speed is high.
Description
Technical field
The present invention relates to colliery non chain pillar entryprotection technology.
Background technology
Non chain pillar entryprotection technology is the important development direction of Coal Mining Technology, not only can reduce the waste of coal resources, improve resource recovery, and eliminate the stress concentration phenomenon producing because of reserved coal pillar, highly beneficial to dynamic disasters such as control Rock Burst, coal and Gas Outbursts, meanwhile, mine sustainable development and the green exploitation of realization are also had to important function.
At present conventional non chain pillar entryprotection technology mainly contains two kinds of gob side entry retaining and gob side entry drivings.
So-called edge air gallery technology, refers in the time mining, and utilizes support material to safeguard former stope drift active workings along edge, goaf, the return aircourse using former stope drift active workings as next work plane, and the defect of existence is:
The one,, because the stope drift active workings of a upper work plane and the return aircourse of next work plane are tunnels, make tunnel be subject to the mining influence of upper and lower two work planes, ore deposit is pressed and is manifested acutely, the contraction percentage of area is large, particularly when the condition such as high seam longwall top coal caving, heavily stressed coal seam, deep and tight roof, gob side entry retaining is safeguarded very difficult, often need repeatedly to reprocess, and obturation is easily damaged by pressure, produce crack and cause goaf air leaking, commute spontaneous combustion, the seam mining that gas bearing capacity is high are very unfavorable.
The 2nd,, during due to Liu lane, need to utilize at edge, goaf support material to build together interim body of wall, when construction, first use individual prop temporary lining, then pile up spoil body of wall, or frame formwork supporting plate carries out filling, complicated construction technique, filling velocity is slow, affects coal mining progress.
The 3rd,, due to roadside packing body, to connect top rate low, cuts top weak effect, causes obturation to bear pressure larger, easily produces crack, easily causes to goaf air leaking again, easily causes spontaneous combustionof coal.
So-called gob side entry driving technology, refers to along edge, goaf digging laneway or only stays very narrow coal column digging laneway, and whether according to staying coal column be divided into Tunnelling Along Goaf and stay two kinds of modes of fender gob side entry driving, the defect of existence is:
Adopt when Tunnelling Along Goaf, tunnel goaf side needs filling or piles up the waste pack etc. of certain width, and construction technology is more complicated; Pick directly connects with tunnel in goaf when lane, causes goaf air leaking, and the water in goaf and pernicious gas easily enter tunnel, to goaf prevent fires, tunnelling is safely etc. very unfavorable; Be not suitable for easy spontaneous combustion, gas bearing capacity is high, water yield is large coal seam;
When fender gob side entry driving is stayed in employing, will the certain coal resources of waste, and stability of coal pillar is poor, easily unstability, wall caving, freshly distinguished and admirablely can enter goaf by coal column crack, easily causes that goaf gets angry.
Summary of the invention
In order to overcome, in non chain pillar entryprotection technology, tunnel is difficult in maintenance, the contraction percentage of area is large, and coal mining speed is slow, supporting effect is poor and the shortcoming of goaf air leaking, the invention provides a kind of pre-pick and leads the artificial side of cave filling secondary multiplexing roadside support and become lane method.
Technical scheme of the present invention is:
A kind of pre-pick is led the artificial side of cave filling secondary multiplexing roadside support and is become lane method, it is characterized in that:
The first step: the driving of the upper and lower stope drift active workings of the first work plane
The 1.1st step: dig in advance stope drift active workings under the first work plane and lead cave
Under the first work plane before back production tunnelling, first the lower side position of stope drift active workings under the first work plane, under wide the first work plane of driving 2m, stope drift active workings are led cave, and it is contour isometric that under the first work plane, stope drift active workings are led under cave and the first work plane stope drift active workings, and do temporary lining;
The 1.2nd step: under the first work plane, stope drift active workings are led the filling of cave
Under the first work plane, stope drift active workings are led after cave tunneled, and lead filling solidification material in cave to stope drift active workings under the first work plane, form the first artificial side of work plane;
The 1.3rd step: the upper and lower stope drift active workings of the first work plane tunnel simultaneously
Treat under the first work plane that stope drift active workings are led cave whole fill complete, solidify after 1～2 month, tunnel stope drift active workings under the first work plane along the first artificial side of work plane, wherein the first artificial side of work plane becomes a side wall body of stope drift active workings under the first work plane, tunnels stope drift active workings on the first work plane according to conventional method simultaneously;
Second step: the first working face mining
After stope drift active workings have been arranged under the first work plane, carry out the exploitation of the first work plane; Along with the exploitation of the first work plane, the upper and lower stope drift active workings of the first work plane after exploitation are no longer safeguarded, directly scrap, and are caving gradually together with goaf, and the goaf being caving is progressively stable with the roof strata of scrapping stope drift active workings;
The 3rd step: the driving of the upper and lower stope drift active workings of the second work plane
In the first working face mining or after the first working face mining is complete, tunnel stope drift active workings on the second work plane along the first artificial side of work plane opposite side again, the first artificial side of work plane becomes a side wall body of stope drift active workings on the second work plane, under the second work plane back production tunnelling according to above-mentioned steps once stope drift active workings driving method carry out;
The 4th step: the upper and lower stope drift active workings driving of the second working face mining and the 3rd work plane is continued to use respectively above-mentioned steps two and three, by that analogy, until this section all working face exploitation is complete.
Advantage applies of the present invention exists:
1, compared with edge air gallery technology in existing non chain pillar entryprotection technology, in the present invention, stope drift active workings are directly caving, and need not safeguard, the contraction percentage of area is little, applicable equally at complex conditions such as high seam longwall top coal caving, the heavily stressed seam minings in deep; Adopt pre-pick to lead cave and carry out filling, when filling, lead cave both sides and be entity coal, need not two side templates when filling, technique is simple, speed of application is fast.
2, directly connect top owing to leading cave obturation and top board, it is isolated that goaf is filled with body all the time, enters the security incidents such as the goaf ignition, tunnel water burst and the gas explosion that cause in tunnel can effectively prevent Tunnelling Along Goaf time because of pernicious gases such as water and gas in goaf air leaking and goaf; Can effectively completely cut off goaf, prevent goaf air leaking, avoid goaf coal incidents of spontaneous combustion to occur, highly beneficial to preventing fires.
3, obturation adopts concrete filling material and reinforcing bar, and intensity is large, toughness is high, cuts top effective, is conducive to reduce side direction roof pressure, has substantially eliminated the tunnel unstable phenomenon causing because of wall caving.
4, because filling is in advance led the pre-buried artificial body of wall of cave, the filling velocity impact on working face mining slowly while having eliminated gob side entry retaining.
5, compared with Tunnelling Along Goaf technology in existing non chain pillar entryprotection technology, when the present invention tunnels stope drift active workings, without in goaf side filling or pile up waste pack, construction technology is simple, and tunnelling speed is fast.
6, owing to having completely abolished coal column, compared with staying fender gob side entry driving technology, reduce the waste of coal resources, improve resource recovery.
In a word, the present invention is the side wall body as stope drift active workings by pre-buried artificial body of wall, has not only realized complete non chain pillar entryprotection, and tunnelling and filling process simple, become lane speed fast, little impact on production, stability and the safety of roadway surrounding rock are significantly improved.In addition, overall economic efficiency of the present invention is good, to the strong adaptability of coal seam thickness, coal-mining method, condition of coal seam occurrence, roof and floor condition, spontaneous combustion situation and gas hydrologic condition etc., has greatly expanded the scope of application of non chain pillar entryprotection technology.
Brief description of the drawings
Fig. 1 is that cave plane of arrangement figure is led in the pre-pick of the present invention;
Fig. 2 is that cave layout elevation is led in the pre-pick of the present invention;
Fig. 3 is that cave filling situation arrangement diagram is led in the pre-pick of the present invention;
Fig. 4 is that the elevation that forms artificial side after cave filling is led in the pre-pick of the present invention;
Fig. 5 is the elevation after the present invention's the first working face extraction tunnelling;
Fig. 6 is the elevation after the present invention's the first working face extraction;
Fig. 7 is the elevation after the stope drift active workings of the present invention's the second work plane tunnel;
Fig. 8 is the elevation after the present invention's the second working face extraction;
Fig. 9 is the present invention's floor map of constructing.
Under marginal data: 1-the first work plane, stope drift active workings are led cave; 2-the first work plane; 3-the second work plane; 4-the first artificial side of work plane; Stope drift active workings on 5a-the first work plane; Stope drift active workings under 5b-the first work plane; Stope drift active workings on 6a-the second work plane; Stope drift active workings under 6b-the second work plane; 7-filling section; The positive filling section of 8-; 9-filling template; The supporting of 10-monomer; 11-grouting pipeline; 12-filling pump; 13-goaf; 14-the 3rd work plane; Under 15-the second work plane, stope drift active workings are led cave; 16-the second artificial side of work plane.
Detailed description of the invention
With reference to the accompanying drawings the present invention is described in further details.
As shown in Fig. 1-9, pre-pick of the present invention is led the artificial side of cave filling secondary multiplexing roadside support and is become lane method to be:
The first step: the driving of the upper and lower stope drift active workings 5a of the first work plane, 5b
The 1.1st step: dig in advance stope drift active workings under the first work plane and lead cave 1
As depicted in figs. 1 and 2, before under the first work plane, stope drift active workings 5b tunnels, first the lower side position of stope drift active workings 5b under the first work plane, tunnel stope drift active workings under the first wide work plane of 2m and lead cave 1, it is contour isometric that under the first work plane, stope drift active workings are led under cave 1 and the first work plane stope drift active workings 5b, and do temporary lining; When temporary lining, determine according to leading cave wall rock condition, when wall rock condition is stablized, can adopt wooden prop, an intercolumniation array pitch 0.5-2.0m; When wall rock condition is unstable, can adopt the supporting of individual prop+articulated roof beam or adopt bolt support, adopt when bolt support therebetween, array pitch is 1.0-2.0m, shown in Fig. 3, carries out temporary lining with monomer supporting 10;
The 1.2nd step: under the first work plane, stope drift active workings are led the filling of cave 1
As shown in Figure 3, under the first work plane, stope drift active workings are led after cave 1 tunneled, and lead filling solidification material in cave 1 to stope drift active workings under the first work plane, form the first artificial side 4 of work plane;
Solidification material is mixed and is formed by the broken spoil of the river sand of 100 parts of cement, 25 parts of granularity 5-10mm, 50 parts of granularity 5-10mm, 140 parts of flyash, 2 parts of early strength admixture, 2 parts of water reducing agents and suitable quantity of water, when filling leading a certain amount of reinforcing bar of interlaced arrangement in cave 1; Require obturation final setting time to be not more than 3 hours, final strength is not less than 2MPa, and within 28 days, intensity is not less than 30MPa.When sublevel fill stoping, be retrusive sublevel fill stoping, every 3-5m is as one section, and after 7 initial sets of filling section above, the 3-5m that draws back, props up upper filling template 9, and filler is delivered to rear positive filling section 8 by filling pump 12 and grouting pipeline 11; Every section of sand off after coagulation carries out next section of filling for 3 hours above again, until the whole cave 1 of leading is filled up, solidifies rear formation pre-buried artificial body of wall together, is called for short the first artificial side 4 of work plane (seeing Fig. 4);
The 1.3rd step: under the first work plane, on stope drift active workings 5b and the first work plane, stope drift active workings 5a tunnels simultaneously
As shown in Figure 5, treat under the first work plane that stope drift active workings are led cave 1 whole fill complete, solidify after 1-2 month, tunnel stope drift active workings 5b under the first work plane along the first artificial side 4 of work plane, wherein the first artificial side 4 of work plane becomes a side wall body of stope drift active workings 5b under the first work plane; Tunnel stope drift active workings 5a on the first work plane according to existing conventional method at section to be exploited simultaneously;
Second step: the first work plane 2 is exploited
After stope drift active workings 5b has arranged under the first work plane, carry out the exploitation of the first work plane 2; Along with the exploitation of the first work plane 2, under the first work plane after exploitation, on stope drift active workings 5b and the first work plane, stope drift active workings 5a no longer safeguards, directly scraps, and is caving gradually, together with goaf 13 as shown in Fig. 6 and Fig. 9; The goaf 13 being caving and the roof strata of scrapping stope drift active workings are progressively stable;
The 3rd step: the driving of stope drift active workings 6b under stope drift active workings 6a and the second work plane on the second work plane
As shown in Fig. 7 and Fig. 9, when the first work plane 2 is exploited or after the first work plane 2 has been exploited, tunnel stope drift active workings 6a on the second work plane along the first artificial side of work plane 4 opposite sides again, the first artificial side 4 of work plane becomes a side wall body of stope drift active workings 6a on the second work plane, under the second work plane, stope drift active workings 6b driving carries out according to lower back production tunnelling method in above-mentioned steps two, first under pre-pick the second work plane, stope drift active workings are led cave 15, and fill formation the second artificial side 16 of work plane;
The 4th step: the second work plane 3 is exploited and the upper and lower stope drift active workings driving of the 3rd work plane 14 is continued to use respectively above-mentioned steps two and three, after the second work plane 3 has been exploited, on the second work plane, under stope drift active workings 6a and the second work plane, stope drift active workings 6b is caving gradually together with goaf, the first artificial side 4 of work plane completes mission, as shown in Figure 8 and Figure 9;
By that analogy, until this section all working face exploitation is complete.
Claims (1)
1. pre-pick is led the artificial side of cave filling secondary multiplexing roadside support and is become a lane method, it is characterized in that,
The first step: the driving of the upper and lower stope drift active workings of the first work plane
The 1.1st step: dig in advance stope drift active workings under the first work plane and lead cave
Under the first work plane before back production tunnelling, first the lower side position of stope drift active workings under the first work plane, under wide the first work plane of driving 2m, stope drift active workings are led cave, and it is contour isometric that under the first work plane, stope drift active workings are led under cave and the first work plane stope drift active workings, and do temporary lining;
The 1.2nd step: under the first work plane, stope drift active workings are led the filling of cave
Under the first work plane, stope drift active workings are led after cave tunneled, and lead filling solidification material in cave to stope drift active workings under the first work plane, form the first artificial side of work plane;
The 1.3rd step: the upper and lower stope drift active workings of the first work plane tunnel simultaneously
Treat under the first work plane that stope drift active workings are led cave whole fill complete, solidify after 1～2 month, tunnel stope drift active workings under the first work plane along the first artificial side of work plane, wherein the first artificial side of work plane becomes a side wall body of stope drift active workings under the first work plane, tunnels stope drift active workings on the first work plane according to conventional method simultaneously;
Second step: the first working face mining
After stope drift active workings have been arranged under the first work plane, carry out the exploitation of the first work plane; Along with the exploitation of the first work plane, the upper and lower stope drift active workings of the first work plane after exploitation are no longer safeguarded, directly scrap, and are caving gradually together with goaf, and the goaf being caving is progressively stable with the roof strata of scrapping stope drift active workings;
The 3rd step: the driving of the upper and lower stope drift active workings of the second work plane
In the first working face mining or after the first working face mining is complete, tunnel stope drift active workings on the second work plane along the first artificial side of work plane opposite side again, the first artificial side of work plane becomes a side wall body of stope drift active workings on the second work plane, under the second work plane back production tunnelling according to above-mentioned steps once stope drift active workings driving method carry out;
The 4th step: the upper and lower stope drift active workings driving of the second working face mining and the 3rd work plane is continued to use respectively above-mentioned steps two and three, by that analogy, until this section all working face exploitation is complete.
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| CN105317459A (en) * | 2015-11-19 | 2016-02-10 | 中国矿业大学(北京) | Subarea filling method used for controlling large-area falling disaster of hard roof |
| CN108104813A (en) * | 2017-11-22 | 2018-06-01 | 临沂矿业集团菏泽煤电有限公司 | A kind of coal-mining method by roof collapse area |
| CN111720119A (en) * | 2020-07-22 | 2020-09-29 | 天地科技股份有限公司 | Coal mine pillar-free wall-reserving mining method |
| CN113464140A (en) * | 2021-08-18 | 2021-10-01 | 山东新巨龙能源有限责任公司 | Coal mine bed-jig roadway coal-pillar-free mining method |
| CN113605893A (en) * | 2021-08-26 | 2021-11-05 | 河南理工大学 | Control method for pre-filled completely gob-side entry driving surrounding rock |
| CN114109392A (en) * | 2021-10-14 | 2022-03-01 | 中煤科工开采研究院有限公司 | Wide-excavation narrow-filling type excavation method of stoping roadway |
| CN117090573A (en) * | 2023-10-17 | 2023-11-21 | 臣功环境科技有限公司 | Z-type full-wind-pressure staggered strip continuous mining and continuous charging integrated process for mine |
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| CN105317459A (en) * | 2015-11-19 | 2016-02-10 | 中国矿业大学(北京) | Subarea filling method used for controlling large-area falling disaster of hard roof |
| CN108104813A (en) * | 2017-11-22 | 2018-06-01 | 临沂矿业集团菏泽煤电有限公司 | A kind of coal-mining method by roof collapse area |
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| CN113464140A (en) * | 2021-08-18 | 2021-10-01 | 山东新巨龙能源有限责任公司 | Coal mine bed-jig roadway coal-pillar-free mining method |
| CN113464140B (en) * | 2021-08-18 | 2023-09-22 | 山东新巨龙能源有限责任公司 | Coal mine forming roadway coal pillar-free mining method by using coal mine tire membrane |
| CN113605893A (en) * | 2021-08-26 | 2021-11-05 | 河南理工大学 | Control method for pre-filled completely gob-side entry driving surrounding rock |
| CN113605893B (en) * | 2021-08-26 | 2023-11-21 | 河南理工大学 | Control method for pre-filling full gob-side entry driving surrounding rock |
| CN114109392A (en) * | 2021-10-14 | 2022-03-01 | 中煤科工开采研究院有限公司 | Wide-excavation narrow-filling type excavation method of stoping roadway |
| CN117090573A (en) * | 2023-10-17 | 2023-11-21 | 臣功环境科技有限公司 | Z-type full-wind-pressure staggered strip continuous mining and continuous charging integrated process for mine |
| CN117090573B (en) * | 2023-10-17 | 2023-12-19 | 臣功环境科技有限公司 | Z-type full-wind-pressure staggered strip continuous mining and continuous charging integrated process for mine |
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