CN104912590A - Separated filling entry retaining method for sandstone roof medium-thickness coal seam - Google Patents
Separated filling entry retaining method for sandstone roof medium-thickness coal seam Download PDFInfo
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- CN104912590A CN104912590A CN201510271570.9A CN201510271570A CN104912590A CN 104912590 A CN104912590 A CN 104912590A CN 201510271570 A CN201510271570 A CN 201510271570A CN 104912590 A CN104912590 A CN 104912590A
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Abstract
The invention discloses a separated filling entry retaining method for a sandstone roof medium-thickness coal seam. According to the method, the width of filling bodies is designed according to the stope geological conditions and the surrounding rock properties; the filling body intervals are determined according to the daily advancing condition of a working face; anchor rods are supported for supporting and protecting a roof in a roadway; a metal screen is erected for protection; the circle progress of roadway-side filling bodies is determined through being combined with the concrete production technical conditions of a mine; a separated filling mode is adopted for filling body filling; a separation plate is used between every two adjacent filling bodies for separation and sealing, so that the gob area air leakage is prevented. The separated filling entry retaining method has the characteristics that the safety and the stability are high; the filling construction engineering quantity is small; and the filling cost is low, and the like. The separated filling entry retaining method is applicable to the gob-side entry retaining mining of the medium-thickness coal seam under the conditions that the condition is the sandstone roof condition; the coal seam is more stable; the coal seam inclination angle is smaller than 25 degrees; the coal seam thickness in the gob area range is stable; and no great-fall fault exists.
Description
Technical field
The present invention relates to a kind of method of gob side entry retaining, particularly relate to the filling of a kind of sandstone top board medium-thickness seam compartment and stay lane method, belong to Mineral Engineering field.
Background technology
Gob side entry retaining, that is, without the problem of coal pillar mining technology as one " not only old but also new ", which reduces ten thousand tons, tunnel drivage ratio, and eliminate the coal resources loss of stage coal pillar.Saying its " always ", is because gob side entry retaining just proposes from the sixties in last century and tests in indivedual colliery and obtain successfully; Saying that it is " newly ", is because the general applicability for gob side entry retaining is not also come to a conclusion.Particularly, the surrouding rock deformation rule of gob side entry retaining and the parameter designing of roadside support, also do not form specification so far.
In gob side entry retaining, roadside support body demand fulfillment intensity is enough large, cut top in time, good leak tightness, again can Anti-air-leakage, and there is certain contractibility, to adapt to the motion of base object model.
In gob side entry retaining, because distance, space are large, roadside support body construct the man power and material's cost needing at substantial.
In recent years, along with the development of pumping of concrete correlation technique, pumping high-moisture quick-setting fills the roadside packing technology of material, has obtained general employing.The development of concrete ejection technology, on the one hand, significantly reduces the labour intensity of roadside packing construction; On the other hand, also drastically increase efficiency of construction, reduce the cycle of construction.
How to improve the obturation placement method of prior art, namely, on the basis of safe and effective roadside packing, by the improvement on filling method or method, further reduction filling cost, has become the focus of those skilled in the art's research and has thirsted for solution for a long time but one of unsolved technical problem always.
Summary of the invention
The object of the invention is, provide the filling of a kind of sandstone top board medium-thickness seam compartment to stay lane method, the raw material that its obturation construction works amount is little, filling consumes is relatively less, and pack effectiveness is high, and integrated cost is low.
The present invention for achieving the above object required technical problem solved is, how fully to keep the condition of stability of the roadway, to keep the seal in goaf, and under the prerequisite of the safety and high efficiency of guarantee mine, the obturation construction works amount of effective reduction gob side entry retaining, save filling cost, and then reduce the technical problem of pit mining cost.
The present invention for solving the problems of the technologies described above adopted technical scheme is, lane method is stayed in the filling of a kind of sandstone top board medium-thickness seam compartment, it is characterized in that, comprises the following steps:
The first step, according to stope geological conditions and rock property, the width of design obturation;
According to the daily footage determination block interval of work plane; Further, install anchor pole and supporting is carried out to the top board in lane, and set up wire lath and protect;
Second step, in conjunction with the concrete production specifications of mine, determines the advance of working cycle of road-in packing;
3rd step, in stowing operation, first sets up division board in interval section; Then, construct an obturation at a certain distance, until tunnel stays obturation needed for lane all to construct;
Construct in process in above-mentioned obturation, that section of division board at obturation position place is cast directly over obturation inside;
4th step, after body to be filled solidification, between obturation and top, base plate, division board and top, between base plate, and each gap of division board therein is carried out whitewashing and is sealed, and prevents goaf air leaking;
Described sandstone top board medium-thickness seam refers to: sandstone roof condition, and coal seam is comparatively stable, seam inclination is less than 25 °; Further, within the scope of exploiting field, coal seam thickness is stablized, without the medium-thickness seam of the larger tomography of drop.
The technique effect that technique scheme is directly brought is, adopt the mode of interval filling, carry out sandstone top board medium-thickness seam tunnel and stay constructing of lane obturation, to the section of load bearing support must carrying out obturation and construct, directly adopt division board to isolate, cut off and seal to the section without the need to load bearing support.This technological thought produces and practical application, apparently, significantly can save the use of filler, shortens the filling construction operation time, raises the efficiency and reduce integrated cost.
The difficult point of technique scheme is, sandstone roof condition, the medium-thickness seam that coal seam is comparatively stable, seam inclination is less than 25 °; Further, within the scope of exploiting field, coal seam thickness is stablized, and without the tomography that drop is larger, the sandstone top board medium-thickness seam under this precondition, in its gob side entry retaining, roadside packing can adopt interval filling method to carry out filling.The announcement of this objective law and discovery, being prerequisite and the basis of the formation of the technology of the present invention thought, is the key point of technical solution of the present invention.
That is, this " rule " or " discovery of this technical problem ", the solution making it follow-up is natural, very clear.
It should be noted that, in gob side entry retaining, (continous way) strip filling method of prior art, long-term existence.And all the time, those skilled in the art continues to have carried out such or such many technological improvements, but no matter which kind of technological improvement, its most essential most crucial " form of structure of continous way ", always for those skilled in the art firmly believe and use till today.That is, this is from a side sufficient proof: the present invention (discloses this objective law for the discovery of the above-mentioned technical problem existing for prior art, in other words conj.or perhaps for the discovering of this technology prejudice, cognitive until the process that solves), absolutely not obviously.
The reliability of above-mentioned technological thought and the basis of validity are: for sandstone top board, because lithology is better, more stable, and the tension of its top board and shear strength are comparatively large, support can keep self not rupturing without the need to pressure-bearing.Reason is, when not considering the support force of side, tunnel coal body, its mechanical model is simply supported beam model, and the foundation of this simply supported beam model, need whether stabilize to precondition with interval top board.In fact, the amount of deflection through immediate roof suspended span rock stratum corresponding to the work plane that calculates is very little.That is, gob side entry retaining under this mine condition, on orebody trend, stay the basic deformation amount of establishing interval top board less, the ceiling location place in the middle of span, the position of maximum deformation quantity.Therefore, stay in tunnel when establishing non-support top board, as long as the span in tunnel is no more than limiting value, can stability of the roadway be protected; Even if stay establish larger spacing distance or meet the structure such as tomography time, only certain reinforcement for support and protect measure need be taked can to ensure the stability of top board to suspended span top board.
Technique scheme, it utilizes the mutual coordinated of division board, obturation, anchor pole, ensure that the safety in production in tunnel.
Be not difficult to find out, under the sandstone medium-thickness seam of technique scheme, lane method is stayed in compartment filling, fully meeting under the condition keeping stability of the roadway, the seal in maintenance goaf, the safety and high efficiency of guarantee mine, significantly can reduce the obturation consumption of raw materials amount of gob side entry retaining, (practical situations shows to save filling cost, on average can reduce by more than 40%), thus reduce the integrated cost of pit mining, reduce unit cost of mining.
Be preferably, above-mentioned division board is plank, color steel or glass epoxy.
The technique effect that this optimal technical scheme is directly brought is, plank, color steel or glass epoxy, and its common feature is: lightweight, inexpensive, thermal insulation and decay resistance is good, standardization convenient processing and manufacture.Like this, on the one hand, constructing operation labour intensity reduces, and is beneficial to the further control of cost; On the other hand, be conducive to working environment in tunnel keep and improve.
Further preferably, above-mentioned division board is rectangular shape.
The technique effect that this optimal technical scheme is directly brought is, makes rectangular shape, be conducive to unified for division board regulation and standardization construction operation, increase work efficiency further.
In sum, the present invention, relative to prior art, has following beneficial effect:
1, adopt the filling of road-in packing interval, the consumption of tunnel filling material can be reduced, reduce cost of production;
2, adopt division board to isolate between obturation and obturation, sealing, construction costs significantly reduces, and thermal insulation and efficiency of construction significantly improve.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram in tunnel of the present invention;
Fig. 2 is the side-looking structural representation in tunnel of the present invention.
Description of reference numerals: 1-obturation; 2-division board; 3-goaf; 4-top board; 5-base plate; 6-anchor pole; 7-coal seam.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in detail.
Lane method is stayed in a kind of sandstone top board medium-thickness seam compartment of the present invention filling, it is characterized in that, comprises the following steps:
The first step, according to stope geological conditions and rock property, the width of design obturation 1;
According to the daily footage determination block interval of work plane; Further, the top board 4 installed in anchor pole 6 pairs of lanes carries out supporting, and sets up wire lath and protect;
Second step, in conjunction with the concrete production specifications of mine, determines the advance of working cycle of road-in packing;
3rd step, in stowing operation, first sets up division board 2 in interval section; Then, construct an obturation 1 at a certain distance, until tunnel stays obturation needed for lane all to construct;
Construct in process in above-mentioned obturation, that section of division board at obturation position place is cast directly over obturation inside;
4th step, after body to be filled solidification, between obturation and top, base plate, division board and top, between base plate 4,5, and each gap of division board therein is carried out whitewashing and is sealed, and prevents goaf 3 from leaking out;
Above-mentioned sandstone top board medium-thickness seam refers to: sandstone roof condition, and coal seam is comparatively stable, seam inclination is less than 25 °; Further, within the scope of exploiting field, coal seam thickness is stablized, without the medium-thickness seam 7 of the larger tomography of drop.
Above-mentioned division board is plank, color steel or glass epoxy.
Above-mentioned division board is rectangular shape.
Embodiment 1
For A mine B tunnel, certain mining area:
Its basic condition is: pit mining 16 coal, coal seam thickness 1.6m, seam inclination 22 °, and Roof rock feature is metastable siltstone and packsand, and tunnel total length is 1000m.
Said method is adopted to carry out interval filling:
Be 1.8m according to stope geological conditions and rock property determination obturation width, utilize high strength anchor bar 4 to combine support in mine gateway etc. at side, the tunnel partial panels at division board place and safeguard, anchor pole is arranged as the layout of 800mm × 800mm;
In conjunction with the concrete production specifications of mine, determine the advance of working cycle 4.8m of road-in packing, wherein the length of obturation is 3m, and its spacing distance is 1.8m;
Wherein, division board adopts plank.
Actual result proves, roof stability is good, Roadway Safety is good, construction works amount and engineering time significantly reduce;
With (continuously) strip filling Method compare of prior art, filling cost reduces about 41%.
Embodiment 2
B1 tunnel for certain mining area A1 mine:
Its basic condition is: pit mining 12 coal, coal seam thickness 1.8m, seam inclination 25 °, and the packsand that Roof rock feature is is comparatively stable, tunnel total length 810m.
Said method is adopted to carry out interval filling:
Be 2.0m according to stope geological conditions and rock property determination obturation width, utilize high strength anchor bar 4 to combine support in mine gateway etc. at side, the tunnel partial panels at division board place and safeguard, anchor pole is arranged as the layout of 900mm × 900mm;
In conjunction with the concrete production specifications of mine, determine the advance of working cycle 6m of road-in packing, wherein the length of obturation is 4m, and its spacing distance is 2m;
Wherein, division board adopts color steel.
Actual result proves, roof stability is good, Roadway Safety is good, construction works amount and engineering time significantly reduce;
With (continuously) strip filling Method compare of prior art, filling cost reduces about 42%.
Embodiment 3
B2 tunnel for certain mining area A2 mine:
Its basic condition is: pit mining 28 coal, coal seam thickness 1.5m-1.8m, seam inclination 22 °, and the packsand that Roof rock feature is wherein is mingled with a small amount of fossil plant fragment, but still steady rock stratum in belonging to, tunnel total length 1200m.
Said method is adopted to carry out interval filling:
Be 1.8m according to stope geological conditions and rock property determination obturation width, utilize high strength anchor bar 4 to combine support in mine gateway etc. at side, the tunnel partial panels at division board place and safeguard, anchor pole is arranged as the layout of 800mm × 800mm;
In conjunction with the concrete production specifications of mine, determine the advance of working cycle 4.8m of road-in packing, wherein the length of obturation is 3m, and its spacing distance is 1.8m;
Wherein, division board adopts glass epoxy.
Actual result proves, roof stability is good, Roadway Safety is good, construction works amount and engineering time significantly reduce;
With (continuously) strip filling Method compare of prior art, filling cost reduces about 40%.
Claims (3)
1. a lane method is stayed in the filling of sandstone top board medium-thickness seam compartment, it is characterized in that, comprises the following steps:
The first step, according to stope geological conditions and rock property, the width of design obturation;
According to work plane daily footage situation determination obturation interval;
Further, install anchor pole and supporting is carried out to the top board in lane, and set up wire lath and protect;
Second step, in conjunction with the concrete production specifications of mine, determines the advance of working cycle of road-in packing;
3rd step, in stowing operation, first sets up division board in interval section; Then, construct an obturation at a certain distance, until tunnel stays obturation needed for lane all to construct;
Construct in process in above-mentioned obturation, that section of division board at obturation position place is cast directly over obturation inside;
4th step, after body to be filled solidification, between obturation and top, base plate, division board and top, between base plate, and each gap of division board therein is carried out whitewashing and is sealed, and prevents goaf air leaking;
Described sandstone top board medium-thickness seam refers to: sandstone roof condition, and coal seam is comparatively stable, seam inclination is less than 25 °; Further, within the scope of exploiting field, coal seam thickness is stablized, without the medium-thickness seam of the larger tomography of drop.
2. under a kind of sandstone medium-thickness seam according to claim 1, lane method is stayed in compartment filling, and it is characterized in that, described division board is plank, color steel or glass epoxy.
3. under a kind of sandstone medium-thickness seam according to claim 1 and 2, lane method is stayed in compartment filling, and it is characterized in that, described division board is rectangular shape.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510271570.9A CN104912590B (en) | 2015-05-26 | 2015-05-26 | Separated filling entry retaining method for sandstone roof medium-thickness coal seam |
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| CN201510271570.9A CN104912590B (en) | 2015-05-26 | 2015-05-26 | Separated filling entry retaining method for sandstone roof medium-thickness coal seam |
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| CN104912590B CN104912590B (en) | 2017-05-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681206A (en) * | 2018-08-20 | 2019-04-26 | 华北科技学院 | A method of filling control ground settlement of mining |
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| CN101737078A (en) * | 2008-11-07 | 2010-06-16 | 中国矿业大学 | Structure and method for preventing gob-side entry retaining filling wall from slipping |
| CN101975085A (en) * | 2010-09-09 | 2011-02-16 | 中国矿业大学 | Gob-side entry retaining reinforcing filling body structure and construction method thereof |
| CN103089299A (en) * | 2013-01-16 | 2013-05-08 | 中国矿业大学 | Obligate cavity channel gob-side entry retaining wall filling method |
| CN203067027U (en) * | 2013-01-23 | 2013-07-17 | 中国矿业大学 | Vaulted gob-side entry filling wall body structure |
| CN104018837A (en) * | 2014-06-20 | 2014-09-03 | 中国矿业大学 | Spacing-filling gob-side entry retaining method for treating dinting gangue |
| CN204175308U (en) * | 2014-10-28 | 2015-02-25 | 中国矿业大学(北京) | A kind of strip filling gob side entry retaining system |
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- 2015-05-26 CN CN201510271570.9A patent/CN104912590B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101737078A (en) * | 2008-11-07 | 2010-06-16 | 中国矿业大学 | Structure and method for preventing gob-side entry retaining filling wall from slipping |
| CN101975085A (en) * | 2010-09-09 | 2011-02-16 | 中国矿业大学 | Gob-side entry retaining reinforcing filling body structure and construction method thereof |
| CN103089299A (en) * | 2013-01-16 | 2013-05-08 | 中国矿业大学 | Obligate cavity channel gob-side entry retaining wall filling method |
| CN203067027U (en) * | 2013-01-23 | 2013-07-17 | 中国矿业大学 | Vaulted gob-side entry filling wall body structure |
| CN104018837A (en) * | 2014-06-20 | 2014-09-03 | 中国矿业大学 | Spacing-filling gob-side entry retaining method for treating dinting gangue |
| CN204175308U (en) * | 2014-10-28 | 2015-02-25 | 中国矿业大学(北京) | A kind of strip filling gob side entry retaining system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681206A (en) * | 2018-08-20 | 2019-04-26 | 华北科技学院 | A method of filling control ground settlement of mining |
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Granted publication date: 20170510 Termination date: 20200526 |