CN102678173A - 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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- CN102678173A CN102678173A CN2012101582833A CN201210158283A CN102678173A CN 102678173 A CN102678173 A CN 102678173A CN 2012101582833 A CN2012101582833 A CN 2012101582833A CN 201210158283 A CN201210158283 A CN 201210158283A CN 102678173 A CN102678173 A CN 102678173A
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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 the coal mine, be specifically related to gob side entry retaining roadside packing structure and job practices.
Background technology
The roadside packing gob side entry retaining is a major reform of coal mining technology; This technology not only can improve the coal resources recovery ratio, prolong mine service-life, reduce the tunnelling amount, alleviate digging takes over contradiction, cancellation isolated island work plane and shortens moving time, and it also is that the mine is carried out coal-mining method and reformed valid approach.
What gob side entry retaining required is to have the high strength roadside packing structure of high good leak tightness simultaneously.At present, gob side entry retaining filling method commonly used both at home and abroad mainly contains waste pack filling, paste body filling, high percentage of water rapid solidifying material filling etc., and the supporting resistance that the waste pack filling provides is less; Seal is poor; Cause the goaf to leak out seriously, paste body filling and high percentage of water rapid solidifying material early strength are low, and contractibility is relatively poor; Under roof weighting, destroy easily, anti-leak out fire prevention and maintenance work bring very big difficulty to gob side entry retaining.
Chinese patent publication number CN101922292A (application number 201010105609.7) discloses a kind of coal mine gob-side entry retaining roadside segment bearing unequal strength support principle and application; A kind of supporting mechanism and application process that is suitable for coal mine gob-side entry retaining segment bearing roadside support, its transportation lane roadside support are divided into two-layer filler combination supporting up and down.The low big filler of deflection of intensity is adopted on the upper strata, and lower floor adopts the higher filler of intensity.Though this technology has reached the effect of supporting to a certain extent; But also there is following defective: the one, because the filling structure adopts two-layer filler combination supporting up and down; In actual application, seal is poor when causing supporting, still can't solve the goaf serious technical problem of leaking out; The 2nd, owing to only provided a general supporting theory, lack feasible operational means, can't finely implement, can not large tracts of land promote.
In order to solve the problem of leaking out of gob side entry retaining; Someone is attempting at the anti-advanced material preferably that leaks out of obturation structure outside spraying, and, Roc diffusing such as the Mary stopped, but because cost is higher; Whitewashing every square metre reaches 500-700 unit, can't large tracts of land promote in the colliery at all.
Summary of the invention
Existing gob side entry retaining filling technique seal is poor in order to overcome, the technological deficiency of leak out serious and operability difference; The present invention provides a kind of filling structure of strong operability of novel simple; This is a kind ofly to depress strongly at top board; Can keep the stable high strength filling structure of gob side entry retaining, also have good seal simultaneously, thoroughly solve 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 spoil bag is inner evenly laterally squeezes into the reinforcing bar that an array pitch is 700mm*700mm, and reinforcing bar passes spoil bag rearward end and exposes outside from staying the 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 entwined each other by iron wire and are fixed into an integral body; On the face that reinforcing bar spoil bag has iron wire to entwine, be coated with the thick cement mortar of 2.0cm; Wherein:
Described filler is meant that by mass ratio be the mixture that 1: 1.7: 5 water, Portland cement, broken spoil formed; Require about 30-40min of this mixture initial setting time, final setting time 1.5-2.5h, spoil bag compressive strength can reach 2-3MPa after the final set; Spoil bag compressive strength can reach 10-20MPa after 28 days.
Described cement mortar is meant that by mass ratio be the mixture that 1: 1.7: 5 water, 425# Portland cement and sand formed.
Said reinforcing bar is preferentially selected the reinforcing bar of HRB335 for use;
It is No. 4-No. 10 steel wire that described iron wire is preferentially selected specification for use.
The present invention has compared following advantage with traditional filling structure:
1, the present invention passes through the composition and the proportioning of adjustment filler, and in the spoil bag, squeezes into reinforcing bar, and exposed portions serve is fixed with iron wire; Not only make the spoil bag have higher intensity; Can also make the spoil bag be linked to be an integral body, prevent coming off of gunite material above the spoil bag, the seal of surface whitewashing enhancing spoil bag; Prevent to stay the lane to leak out, not only overcome the lower shortcoming of simple use (spoil bag filling intensity is generally 10-20MPa); And overcome the relatively poor defective of seal when adopting up and down two-layer filler combination supporting.
2, the compressive strength behind the reinforcing bar spoil bag 28d of the present invention can reach 35-45MPa, and the compressive strength that produces when crushing is generally 20-30MPa, and this explanation filling structure of the present invention is the sinking that can withstand top board fully, and simple in structure.
3, filling architecture of the present invention is simple, and cost is low, and every square metre of whitewashing only needs 50-70 unit, can large tracts of land promote in the colliery.
In a word, the present invention adopts easy filling structure, makes gob side entry retaining reach the anti-double effects that leaks out with high strong supporting, has outstanding substantive distinguishing features and obvious improvement, meets the 22nd article the 3rd section relevant creationary regulation of Patent Law.
Description of drawings
Fig. 1 is the stereogram of filling structure of the present invention.
Fig. 2 is the concrete construction sketch map of filling structure of the present invention.
Label is represented respectively among the figure: 1-spoil bag, and the 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, the 8-advance support; 9-work plane hydraulic prop, the 10-work plane, the 11-goaf, 12-stays the lane; 13-reinforcing bar whitewashing spoil bag, 14-wooden prop, 15-temporary lining, 16-hysteresis supporting.
The specific embodiment
With reference to the accompanying drawings the concrete form of construction work of the present invention is described.
The first step: carry out anchor, rope, net, band supporting and 9 supportings of work plane hydraulic prop behind the underworkings excavation, the face 10 of assigning a work simultaneously, mining face under mine 10 begins normal coal cutting, prop drawing after arranging, forms goaf 11.
Second step: in staying lane 12, carry out advance support 8 and add the articulated roof beam supporting; In staying lane side filling width, carry out support reinforcement with wooden prop 14 again; Propelling along with work plane; Increase hydraulic prop 9 at advance support 8 places, strengthen being hysteresis supporting 16, hysteresis supporting 16 and wooden prop 14 have been born condense initial stage of front top plate of filler jointly and have been pressed.
The 3rd step: supporting begins to prepare the cement mortar material of the filling filler in the spoil bag 1 shown in Figure 1 and the usefulness of whitewashing simultaneously on ground, be transported to and stay in the lane 12.
The 3rd step: pile up the spoil bag 1 that row tightly is equipped with filler for 15 times in work plane 10 rear temporary linings, spoil bag 1 wide 0.4-0.6 rice, long 1.2-1.5 rice; Evenly laterally squeeze into the HRB335 reinforcing bar in spoil bag 1 inside; Reinforcing bar passes spoil bag 1 rearward end and exposes outside from staying the lane private side; It is 8 with exposed portions serve 3 length ratios that reinforcing bar is squeezed into part 2: 1-10: 1, and all exposed portions serve 3 are entwined each other by No. four to No. ten iron wires 5 and are fixed into a whole (see figure 1); Wherein:
Described filler is the mixture that 1: 1.7: 5 water, 425# Portland cement and broken spoil formed by mass ratio; Require about 30-40min of this mixture initial setting time, final setting time 1.5-2.5h, spoil bag compressive strength can reach 2-3MPa after the final set; Spoil bag compressive strength can reach 10-20MPa after 28 days; And the compressive strength behind the reinforcing bar spoil bag 28d can reach 35-45Mpa.
The 4th step: after 10 days, use pulp shooting machine 6 and whitewashing inboard, 7 pairs of obturation tunnels of pipeline to be sprayed with the thick cement sand bed of 2.0cm 4; That is to say, on the face that reinforcing bar spoil bag 1 has iron wire to entwine, be coated with the thick cement sand bed of 2.0cm 4, cement sand bed 4 forms reinforcing bar whitewashing spoil bag 13 as shown in Figure 2 with the spoil bag 1 that is equipped with reinforcing bar;
Described cement mortar is the mixture that 1: 1.7: 5 water, 425# Portland cement and sand formed by mass ratio.
The 5th step: after treating that reinforcing bar whitewashing spoil bag 13 solidified 2-3 days, remove temporary lining 15, simultaneously the hysteresis supporting 16 that removes other both sides, lane outside the 200 meters scopes in 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 a gob side entry retaining lane; It is characterized in that it is closely piled up to arrange by the 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 inner even reinforcing bar that an array pitch is 700mm*700mm of laterally squeezing into of spoil bag; Reinforcing bar passes spoil bag rearward end and exposes outside from staying the 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 entwined each other by iron wire and are fixed into an integral body; On the face that reinforcing bar spoil bag has iron wire to entwine, be coated with the thick cement mortar of 2.0cm; Wherein:
Described filler is meant that by mass ratio be the mixture that 1: 1.7: 5 water, Portland cement, broken spoil formed; Require this mixture initial setting time 30-40min, final setting time 1.5-2.5h, spoil bag compressive strength reaches 2-3MPa after the final set; Spoil bag compressive strength reaches 10-20MPa after 28 days.
Described cement mortar is meant that by mass ratio be the mixture that 1: 1.7: 5 water, 425# Portland cement and sand formed.
2. the other high-strength leakproof filling structure in gob side entry retaining as claimed in claim 1 lane is characterized in that said reinforcing bar is selected the reinforcing bar of HRB335 for use.
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 No. 4-No. 10 steel wire that described iron wire is selected specification for use.
4. like the job practices of the arbitrary described high-strength leakproof filling structure of claim 1-3, it is characterized in that step is following:
The first step: carry out anchor, rope, net, band supporting and work plane hydraulic prop (9) supporting behind the underworkings excavation, the face (10) of assigning a work simultaneously begins normal coal cutting, prop drawing after mining face under mine (10) is arranged, forms goaf (11);
Second step: in Liu Xiang (12), carry out advance support (8) and add the articulated roof beam supporting; In staying lane side filling width, use wooden prop (14) to carry out support reinforcement again; Propelling along with work plane; Locate to increase hydraulic prop (9) at advance support (8), strengthen being hysteresis supporting (16), hysteresis supporting (16) and wooden prop (14) have been born condense initial stage of front top plate of filler jointly and have been pressed;
The 3rd step: supporting begins to prepare the cement mortar material of the filling filler in the spoil bag shown in Figure 1 (1) and the usefulness of whitewashing simultaneously on ground, be transported to and stay in the lane (12);
The 3rd step: under work plane (10) rear temporary lining (15), pile up the spoil bag (1) that row tightly is equipped with filler, the wide 0.4-0.6 rice of spoil bag (1), long 1.2-1.5 rice; Evenly laterally squeeze into the HRB335 reinforcing bar in spoil bag (1) inside; Reinforcing bar passes spoil bag 1 rearward end and exposes outside from staying the lane private side; Reinforcing bar is squeezed into part (2) and exposed portions serve (3) length ratio is 8: 1-10: 1, and all exposed portions serve (3) are entwined each other by No. four to No. ten iron wires (5) and are fixed into an integral body;
The 4th step: after 10 days, use pulp shooting machine (6) and whitewashing pipeline (7) that inboard, obturation tunnel is sprayed with the thick cement sand bed of 2.0cm (4), cement sand bed (4) forms reinforcing bar whitewashing spoil bag (13) with the spoil bag (1) that is equipped with reinforcing bar;
The 5th step: after treating that reinforcing bar whitewashing spoil bag (13) solidified 2-3 days, remove temporary lining (15), simultaneously the hysteresis supporting (16) that removes other both sides, lane outside the 200 meters scopes in recovery operation face rear;
The 6th step: along with the advance of the face repeats above-mentioned circulation second to the 5th 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 |
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| 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 |
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| CN102678173A true CN102678173A (en) | 2012-09-19 |
| CN102678173B 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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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388488A (en) * | 2013-08-21 | 2013-11-13 | 大同煤矿集团有限责任公司 | Thin seam gob-side entry retaining filling method |
| CN106870001A (en) * | 2017-02-21 | 2017-06-20 | 长沙矿山研究院有限责任公司 | Tunnel is layered pocket type self-support filling counterfort construction method |
| CN109490086A (en) * | 2018-12-24 | 2019-03-19 | 山东科技大学 | A kind of supporting roadway surrounding rock strength test device and strength determining method |
| CN110107350A (en) * | 2019-05-28 | 2019-08-09 | 太原理工大学 | A kind of cylinder formula gob side entry retaining roadside packing template and its application method |
| CN112431630A (en) * | 2020-10-27 | 2021-03-02 | 河南理工大学 | Novel 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 |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388488A (en) * | 2013-08-21 | 2013-11-13 | 大同煤矿集团有限责任公司 | Thin seam gob-side entry retaining filling method |
| 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 |
| CN106870001A (en) * | 2017-02-21 | 2017-06-20 | 长沙矿山研究院有限责任公司 | Tunnel is layered pocket type self-support filling counterfort construction 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 |
| CN109490086A (en) * | 2018-12-24 | 2019-03-19 | 山东科技大学 | A kind of supporting roadway surrounding rock strength test device and strength determining method |
| CN110107350A (en) * | 2019-05-28 | 2019-08-09 | 太原理工大学 | A kind of cylinder formula gob side entry retaining roadside packing template and its application 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 |
| CN112431630A (en) * | 2020-10-27 | 2021-03-02 | 河南理工大学 | Novel resistance-increasing type large-deformation gob-side entry retaining roadside support structure and construction method |
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| Publication number | Publication date |
|---|---|
| CN102678173B (en) | 2014-07-02 |
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