CN102678173B - High-strength leakproof packing structure of gob-side entry retaining roadside and construction method thereof - Google Patents
High-strength leakproof packing structure of gob-side entry retaining roadside and construction method thereof Download PDFInfo
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- CN102678173B CN102678173B CN201210158283.3A CN201210158283A CN102678173B CN 102678173 B CN102678173 B CN 102678173B CN 201210158283 A CN201210158283 A CN 201210158283A CN 102678173 B CN102678173 B CN 102678173B
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Abstract
The invention discloses a high-strength leakproof packing structure of a gob-side entry retaining roadside and a construction method thereof. The high-strength leakproof packing structure is formed by closely piling and arranging gangue bags filled with packing materials. Steel bars with inter-row spacing of 700mm*700mm are uniformly and transversely hammered into the inner part of each gangue bag, the steel bars pass through the rear end part of each gangue bag to be exposed out from the inner part side of gob-side entry retaining, the length ratio of the hammered part and the exposed part of each steel bar is 8:1-10:1, and the exposed parts of all steel bars are mutually intertwined and fixed in one through iron wires. Cement plaster with thickness of 2.0cm is sprayed on the surface of each steel bar gangue bag intertwined by the iron wires. According to the high-strength leakproof packing structure, the defect that simple use is lower is overcome, and the defect that the leakproofness is poorer when a composite support with an upper layer of packing materials and a lower layer of packing materials is adopted is also overcome.
Description
Technical field
The present invention relates to be applied in a kind of filling technique under coal mine, be specifically related to gob side entry retaining roadside packing structure and construction method.
Background technology
Roadside packing gob side entry retaining is a major reform of Coal Mining Technology, technique not only can improve coal resources recovery ratio, extend mine service-life, reduce tunnelling amount, alleviate digging takes over contradiction, cancels island working face and shorten moving time, and it is also that the most effective approach of coal-mining method reform is carried out in mine.
Gob side entry retaining is required of has the high strength roadside packing structure of high good leak tightness simultaneously.At present, conventional gob side entry retaining filling method mainly contains waste pack filling, paste body filling, high percentage of water rapid solidifying material filling etc. both at home and abroad, the Support Resistance that waste pack filling provides is less, seal is poor, cause goaf air leaking serious, paste body filling and high percentage of water rapid solidifying material early strength are low, and contractibility is poor, easily under roof weighting, destroy, bring very large difficulty to the fire prevention of gob side entry retaining Anti-air-leakage and maintenance work.
China Patent Publication No. CN101922292A (application number 201010105609.7) discloses a kind of coal mine gob-side entry retaining roadside segment bearing unequal strength support principle and application, be suitable for supporting mechanism and the application process of coal mine gob-side entry retaining segment bearing roadside support, its transportation lane roadside support is divided into upper and lower two-layer filler combination supporting.Upper strata adopts the large filler of the low deflection of intensity, and lower floor adopts the higher filler of intensity.Although this technology has reached the effect of supporting to a certain extent, but also there is following defect: the one, because filling structure adopts upper and lower two-layer filler combination supporting, in actual application, while causing supporting, seal is poor, still cannot solve the serious technical problem of goaf air leaking; The 2nd, owing to only having provided a general supporting theory, lack feasible operational means, cannot finely implement, can not spread.
In order to solve the Air Leakage of gob side entry retaining, someone is attempting at the good advanced material of obturation structure outside spraying Anti-air-leakage, such as Mary is loose, Roc is stopped, but because cost is higher, whitewash every square metre and reach 500-700 unit, at all cannot be at colliery spread.
Summary of the invention
In order to overcome, existing gob side entry retaining filling technique seal is poor, leak out serious and the poor technological deficiency of operability, the invention provides a kind of filling structure of strong operability of novel simple, this is that one is depressed strongly at top board, can keep the stable high strength filling structure of gob side entry retaining, also there is good seal simultaneously, thoroughly solved the technological deficiency of roadside support.
In order to realize above-mentioned task, filling structure of the present invention is closely to be piled up to arrange by the spoil bag that filler is housed to form, the wide 0.4-0.6 rice of spoil bag, long 1.2-1.5 rice, the inner even reinforcing bar that an array pitch is 700mm*700mm of laterally squeezing into of spoil bag, reinforcing bar exposes outside through spoil bag rearward end Cong Liu lane private side, squeezing into part and exposed portions serve length ratio is 8: 1-10: 1, and all reinforcing bar exposed portions serve are mutually entwined and are fixed into an entirety by iron wire; On the face that has iron wire to entwine at reinforcing bar spoil bag, be coated with the cement mortar that 2.0cm is thick; Wherein:
The mixture that water, Portland cement, the broken spoil that it is 1: 1.7: 5 that described filler refers to by mass ratio forms; Require about 30-40min of this mixture initial setting time, final setting time 1.5-2.5h, after final set, spoil bag compressive strength can reach 2-3MPa; After 28 days, spoil bag compressive strength can reach 10-20MPa.
Water, 425# Portland cement and husky molecular mixture that it is 1: 1.7: 5 that described cement mortar refers to by mass ratio.
Described reinforcing bar is preferentially selected the reinforcing bar of HRB335;
It is the steel wire of No. 4-No. 10 that described iron wire is preferentially selected specification.
The present invention has compared following advantage with traditional filling structure:
1, the present invention is by adjusting composition and the proportioning of filler, and squeeze into reinforcing bar in spoil bag, exposed portions serve is fixed with iron wire, not only make spoil bag there is higher intensity, can also make spoil bag be linked to be an entirety, prevent coming off of gunite material above spoil bag, surface whitewashing has strengthened the seal of spoil bag, prevent from staying lane to leak out, not only overcome the lower shortcoming of simple use (spoil bag Strength of backfill is generally 10-20MPa); And overcome the poor defect of seal while adopting upper and lower two-layer filler combination supporting.
2, the compressive strength after reinforcing bar spoil bag 28d of the present invention can reach 35-45MPa, and the compressive strength producing while crushing is generally 20-30MPa, and this explanation filling structure of the present invention is the sinking that can withstand top board completely, and simple in structure.
3, filling structure of the present invention is simple in structure, and cost is low, and every square metre of whitewashing only needs 50-70 unit, can be at colliery spread.
In a word, the present invention adopts easy filling structure, makes gob side entry retaining reach the double effects of Anti-air-leakage and high strong supporting, has outstanding substantive distinguishing features and significant progressive, meets the 3rd section of the 22nd article of Patent Law about creationary regulation.
Accompanying drawing explanation
Fig. 1 is the stereogram of filling structure of the present invention.
Fig. 2 is the Specific construction schematic diagram of filling structure of the present invention.
Number in the figure represents respectively: 1-spoil bag, and 2-reinforcing bar is squeezed into part, 3-reinforcing bar exposed portions serve, 4-cement sand bed, 5-iron wire, 6-pulp shooting machine, the 7-pipeline of whitewashing, 8-advance support, 9-work plane hydraulic prop, 10-work plane, 11-goaf, 12-Liu lane, 13-reinforcing bar whitewashing spoil bag, 14-wooden prop, 15-temporary lining, 16-Lagging support.
The specific embodiment
With reference to the accompanying drawings Specific construction mode of the present invention is described.
The first step: after underworkings excavation, carry out anchor, rope, net, band supporting and 9 supportings of work plane hydraulic prop, the face 10 of simultaneously assigning a work, mining face under mine 10 starts normal coal cutting, prop drawing after arranging, forms goaf 11.
Second step: carry out advance support 8 in Liu lane 12 and add articulated roof beam supporting, in Liu lane side filling width, carry out support reinforcement with wooden prop 14 again, along with the propelling of work plane, at advance support, 8 places increase hydraulic prop 9, strengthen as Lagging support 16, Lagging support 16 and wooden prop 14 shareds condense initial stage of front top plate of filler press.
The 3rd step: supporting simultaneously, starts the cement mortar material of the filling filler in spoil bag 1 shown in set-up dirgram 1 and whitewashing use on ground, be transported to and stay in lane 12.
The 3rd step: pile up row for 15 times and be tightly equipped with the spoil bag 1 of filler in work plane 10 rear temporary lining, the wide 0.4-0.6 rice of spoil bag 1, long 1.2-1.5 rice; Evenly laterally squeeze into HRB335 reinforcing bar in spoil bag 1 inside, reinforcing bar exposes outside through spoil bag 1 rearward end Cong Liu lane private side, part 2 squeezed into by reinforcing bar and exposed portions serve 3 length ratios are 8: 1-10: 1, and all exposed portions serve 3 are mutually entwined and are fixed into an entirety (seeing Fig. 1) by No. four to No. ten iron wires 5; Wherein:
The mixture that water, 425# Portland cement and the broken spoil that described filler is 1: 1.7: 5 by mass ratio forms; Require about 30-40min of this mixture initial setting time, final setting time 1.5-2.5h, after final set, spoil bag compressive strength can reach 2-3MPa; After 28 days, spoil bag compressive strength can reach 10-20MPa; And compressive strength after reinforcing bar spoil bag 28d can reach 35-45Mpa.
The 4th step: after 10 days, use pulp shooting machine 6 and whitewashing pipeline 7 to be sprayed with to inner side, obturation tunnel the cement sand bed 4 that 2.0cm is thick; That is to say, be coated with the cement sand bed 4 that 2.0cm is thick at reinforcing bar spoil bag 1 on the face that has iron wire to entwine, cement sand bed 4 forms reinforcing bar whitewashing spoil bag 13 as shown in Figure 2 together with being equipped with the spoil bag 1 of reinforcing bar;
Water, 425# Portland cement and husky molecular mixture that described cement mortar is is 1: 1.7: 5 by mass ratio.
The 5th step: after treating that reinforcing bar whitewashing spoil bag 13 solidifies 2-3 days, remove temporary lining 15, simultaneously the Lagging support 16 of other both sides, Chu lane outside the scope of 200 meters, recovery operation face rear.
The 6th step: along with the advance of the face repeats above-mentioned circulation second to the 5th step.
Claims (4)
1. the other high-strength leakproof filling structure in gob side entry retaining lane, it is characterized in that, it is closely piled up to arrange by spoil bag that filler is housed and forms, the wide 0.4-0.6 rice of spoil bag, long 1.2-1.5 rice, the reinforcing bar that an array pitch is 700mm × 700mm is evenly laterally squeezed in spoil bag inside, reinforcing bar exposes outside through spoil bag rearward end Cong Liu lane private side, and squeezing into part and exposed portions serve length ratio is 8: 1-10: 1, and all reinforcing bar exposed portions serve are mutually entwined and are fixed into an entirety by iron wire; On the face that has iron wire to entwine at reinforcing bar spoil bag, be coated with the cement mortar that 2.0cm is thick; Wherein:
The mixture that water, Portland cement, the broken spoil that it is 1: 1.7: 5 that described filler refers to by mass ratio forms; Require this mixture initial setting time 30-40min, final setting time 1.5-2.5h, after final set, spoil bag compressive strength reaches 2-3MPa; After 28 days, spoil bag compressive strength reaches 10-20MPa;
Water, 425# Portland cement and husky molecular mixture that it is 1: 1.7: 5 that described cement mortar refers to by mass ratio.
2. the other high-strength leakproof filling structure in gob side entry retaining as claimed in claim 1 lane, is characterized in that, described reinforcing bar is selected the reinforcing bar of HRB335.
3. the other high-strength leakproof filling structure in gob side entry retaining as claimed in claim 1 lane, is characterized in that, it is the steel wire of No. 4-No. 10 that described iron wire is selected specification.
4. the construction method of the other high-strength leakproof filling structure in gob side entry retaining as claimed in claim 1 lane, is characterized in that, step is as follows:
The first step: carry out anchor, rope, net, band supporting and work plane hydraulic prop (9) supporting after underworkings excavation, the face (10) of simultaneously assigning a work, mining face under mine (10) starts normal coal cutting, prop drawing after arranging, form goaf (11);
Second step: carry out advance support (8) in Liu lane (12) and add articulated roof beam supporting, in Liu lane side filling width, use again wooden prop (14) to carry out support reinforcement, along with the propelling of work plane, locate to increase hydraulic prop (9) at advance support (8), strengthen as Lagging support (16), Lagging support (16) and wooden prop (14) shared condense initial stage of front top plate of filler press;
The 3rd step: supporting simultaneously, starts to prepare the cement mortar material of the filler in spoil bag (1) and the use of whitewashing on ground, be transported to and stay in lane (12);
The 4th step: the spoil bag (1) of piling up row and be tightly equipped with filler under work plane (10) rear temporary lining (15); Evenly laterally squeeze into HRB335 reinforcing bar in spoil bag (1) inside, all reinforcing bar exposed portions serve (3) are mutually entwined and are fixed into an entirety by No. four to No. ten iron wires (5);
The 5th step: after 10 days, use pulp shooting machine (6) and whitewashing pipeline (7) to be sprayed with the cement sand bed that 2.0cm is thick (4) to inner side, obturation tunnel, cement sand bed (4) forms reinforcing bar whitewashing spoil bag (13) together with being equipped with the spoil bag (1) of reinforcing bar;
The 6th step: after treating that reinforcing bar whitewashing spoil bag (13) solidifies 2-3 days, remove temporary lining (15), simultaneously the Lagging support (16) of other both sides, Chu lane outside the scope of 200 meters, recovery operation face rear;
The 7th step: along with the advance of the face repeats above-mentioned circulation second to the 6th step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210158283.3A CN102678173B (en) | 2012-05-12 | 2012-05-12 | High-strength leakproof packing structure of gob-side entry retaining roadside and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210158283.3A CN102678173B (en) | 2012-05-12 | 2012-05-12 | High-strength leakproof packing structure of gob-side entry retaining roadside and construction method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN102678173A CN102678173A (en) | 2012-09-19 |
| CN102678173B true CN102678173B (en) | 2014-07-02 |
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| CN201210158283.3A Expired - Fee Related CN102678173B (en) | 2012-05-12 | 2012-05-12 | High-strength leakproof packing structure of gob-side entry retaining roadside and construction method thereof |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388488B (en) * | 2013-08-21 | 2016-01-20 | 大同煤矿集团有限责任公司 | Girdle gob side entry retaining placement method |
| CN106870001B (en) * | 2017-02-21 | 2019-05-21 | 长沙矿山研究院有限责任公司 | Tunnel is layered pocket type self-support filling counterfort construction method |
| CN109490086B (en) * | 2018-12-24 | 2021-03-02 | 山东科技大学 | Roadway surrounding rock support strength test device and strength determination method |
| CN110107350B (en) * | 2019-05-28 | 2020-11-13 | 太原理工大学 | Cylindrical gob-side entry retaining roadside filling template and use method thereof |
| CN112431630B (en) * | 2020-10-27 | 2022-10-14 | 河南理工大学 | Resistance-increasing type large-deformation gob-side entry retaining roadside support structure and construction method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5615979A (en) * | 1995-08-14 | 1997-04-01 | Lin; Fen-Fen | Mine support bag |
| CN201090245Y (en) * | 2007-09-19 | 2008-07-23 | 中国矿业大学 | Flexible filling bag with vessel |
| CN101922292A (en) * | 2010-02-04 | 2010-12-22 | 成云海 | Coal mine gob-side entry retaining roadside segment bearing unequal strength support principle and application |
| CN101936065A (en) * | 2010-08-12 | 2011-01-05 | 惠兴田 | Template with rigid-flexible composite structure and partition wall construction method by retaining roadway along goaf thereof |
| 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 |
-
2012
- 2012-05-12 CN CN201210158283.3A patent/CN102678173B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5615979A (en) * | 1995-08-14 | 1997-04-01 | Lin; Fen-Fen | Mine support bag |
| CN201090245Y (en) * | 2007-09-19 | 2008-07-23 | 中国矿业大学 | Flexible filling bag with vessel |
| CN101922292A (en) * | 2010-02-04 | 2010-12-22 | 成云海 | Coal mine gob-side entry retaining roadside segment bearing unequal strength support principle and application |
| CN101936065A (en) * | 2010-08-12 | 2011-01-05 | 惠兴田 | Template with rigid-flexible composite structure and partition wall construction method by retaining roadway along goaf thereof |
| 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 |
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Granted publication date: 20140702 Termination date: 20210512 |