CN102705002B - Roadside proper yielding unequal combined filling structure of gob-side entry retaining and construction method - Google Patents
Roadside proper yielding unequal combined filling structure of gob-side entry retaining and construction method Download PDFInfo
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- CN102705002B CN102705002B CN201210158287.1A CN201210158287A CN102705002B CN 102705002 B CN102705002 B CN 102705002B CN 201210158287 A CN201210158287 A CN 201210158287A CN 102705002 B CN102705002 B CN 102705002B
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Abstract
The invention discloses a roadside proper yielding unequal combined filling structure of gob-side entry retaining and a construction method. An upper-layer filling body of the filling structure is accumulated by gangue bags; a mixture of water, cements and crashed gangues is filled in the gangue bag; a lower-layer filling body is a filling plaster wall; the filling plaster wall is formed by a mixture of water, cements, waste plasters, blast furnace slags, waste limes, coal ashes and gangue powders. By adjusting the filling height and the preparation proportion of the two filling bodies, the structure provided by the invention can ensure the contractibilities of the filling bodies to be in a reasonable range, thus the filling bodies can better adapt to the movement rule of the hard roof strata and guarantee the stability of the gob-side entry retaining.
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 under tight roof condition.
Background technology
Gob side entry retaining roadside packing 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 it is also that the most effective approach of coal-mining method reform is carried out in mine.
At present, conventional gob side entry retaining roadside packing mode mainly contains cement based paste body filling, waste pack filling, high percentage of water rapid solidifying material filling etc. both at home and abroad.Due to gob side entry retaining under tight roof condition, the basic top-hung of the work plane side direction top time is long, outstanding apex distance is large, the defect that above-mentioned three filling methods exist is: roadside packing body will bear very large roof pressure, for cement based paste body filling body, its early strength is low, contractibility is poor, can not adapt to preferably the competent bed characteristics of motion; Waste pack filling operation amount is large, and the Support Resistance that waste pack provides is less, and supporting effect is poor; High percentage of water rapid solidifying material cost is higher, and supporting intensity is low, is not suitable with the high pressure mutability of gob side entry, during work plane secondary is adopted, obturation is easy to deformation failure, causes goaf air leaking serious, has brought very large difficulty to the ventilation of mine and the maintenance work in tunnel.
The deficiency existing in order to overcome above-mentioned three kinds of filling modes, Chinese patent 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 transport 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, thereby reaches supporting and sealing double effects.The defect existing is: this patent only provides a kind of general supporting theory, lacks practicable operational means, can not adapt to preferably the competent bed characteristics of motion, cannot meet the operational requirements under different supporting environment; The compression functions that allows of filling structure upper strata obturation cannot quantitatively be determined, so when Liu lane filling construction, for preventing goaf top plate inbreak, need to beat anchor pole and carry out advance support and Lagging support, construction is complicated, anchor pole can not reclaim, and is over and can not reclaims even if stay lane to use, and causes and stays lane cost to increase.That is to say, documents 1 itself can not be determined the demand that allows compression functions whether can meet roof collapse, so to be on the safe side, uses anchor pole as lead and lag supporting, cause not only construction cost greatly to improve, and be not suitable for 1.3 meters of following girdle constructions.
In addition, gangue is the solid waste discharging in coal mining process and coal washing process, for a long time, it is regarded as the discarded object of colliery in underground mining process, for a long time in ground air storage, how comprehensive development and utilization gangue, turns waste into wealth, and has become the important topic of coal industry Recent study exploitation.
At present, in roadside support field, how under the prerequisite that reduces obturation cost, making to allow pressure amount can offset the amount of crushing is that those skilled in the art think solution always and there is no the technical problem solving.
Summary of the invention
For overcome gob side entry retaining filling structure construction complexity under existing tight roof condition, cost high, allow and press uncertain defect, the present invention utilizes discarded spoil and industrial residue that a kind of novel filling technique is provided, this is a kind of strong combination filling structure such as not, this strong combination filling structure such as not has the compression functions of allowing, and its lower floor's obturation can provide higher supporting intensity.
In order to realize above-mentioned task, the strong combined support structure such as not of the present invention is combined by upper and lower two-layer obturation, and upper strata obturation adopts the large filler of the low deflection of intensity, and lower floor's obturation adopts the higher filler of intensity, it is characterized in that:
Described upper strata obturation packed height is h
1it is to pile up with the wide spoil bag for 0.4-0.6 rice, long 1.2-1.5 rice, mass ratio be housed be water, cement and the broken spoil mixture of 1: 1.7: 5 in spoil bag, 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;
Described lower floor's obturation is a paste body filling wall, and packed height is h
2, paste body filling wall is 1: 0.3: 0.2 by mass ratio: 0.5: 0.2: 0.3: 0.6 water, cement, waste gypsum, blast-furnace cinder, spent lime, flyash and spoil powder mixture form; Require the compressive strength of paste body filling walling material can reach 5-10MPa in 1 day, within 3 days, can reach 10-20MPa, within 7 days, can reach 20-28MPa, within 28 days, can reach 30-35MPa.
Above-mentioned packed height h
1and h
2determined by following methods:
The first step: according to mining height value and the actual sedimentation value S of immediate roof THICKNESS CALCULATION rock beam
a
S
A=h-m
z(K
A-1)
In formula:
H-mining height;
M
z-immediate roof thickness;
K
a-rock beam touches the broken swollen coefficient of Yi Mao rock stratum, bottom, cash place, and general stope is got 1.25-1.35;
Second step: according to the actual sedimentation value S of rock beam
acalculate upper strata obturation packed height h
1
h
1=α
0S
A／α
In formula:
α-upper strata obturation allows pressure coefficient, gets 0.2;
α
0-allow pressure safety factor, get 1.5;
The 3rd step: according to mining height h and upper strata obturation height h
1calculate the obturation packed height h of lower floor
2
h
2=h-h
1
Compare with other filling structures for gob side entry retaining, the present invention has following advantage:
1, utilize etc. not strong body to combine filling, take into account the advantage of waste pack filling and paste body filling, long for the outstanding top time, the outstanding large tight roof of apex distance, this structure can provide the pressure effect that allows preferably early stage, and alleviation is crushed, and makes obturation be unlikely to be damaged by pressure under higher roof pressure, later stage overall structure provides higher Support Resistance, has ensured the stability of gob side entry retaining.
2, combining structure filler is used waste gypsum, blast-furnace cinder, spent lime, flyash are all industrial residues, effectively utilize these discarded objects and not only can reduce the pollution to environment, can also reduce the cost of filling, remaining composition is also material conventional on colliery, easily obtain the easy row of construction party; According to the characteristic of lower floor's obturation structure, get and allow to press coefficient be 0.2, allowing and pressing safety factor is 1.5, has ensured that secondary adopts the integrality in roof weighting Shi Liu lane, can also alleviate tight roof and stay lane to impact without omen because small sample perturbations is contingent; Can, according to roof characteristic, regulate packed height and the allocation ratio of two kinds of obturations, can make the contractibility of obturation in rational scope, can adapt to preferably like this characteristics of motion of tight roof rock stratum.
3, choosing due to filling structure of the present invention upper strata obturation material mixture ratio and performance parameter, allowing of upper strata obturation pressed and be highly greater than the height crushing, and allow and press height within rational scope, may there is little impacting and can withstand completely without omen in tight roof, so when construction, in order to ensure to stay the success in lane, before lower floor's obturation is condensed, only need to use the other hydraulic prop in lane to carry out preliminary bracing as Lagging support and goaf wooden prop, without the higher bolt support of cost, good stability, has reduced construction cost; After Dang Liu lane uses, stay hydraulic props whole in lane to reclaim, further reduce the cost in Liao Liu lane.
In a word, obturation of the present invention is reducing under the prerequisite of obturation cost and construction cost, realize the object that allows pressure amount can withstand the amount of crushing completely, although simple in structure outwardly, but it has solved those skilled in the art and has thought solution and there is no the technical problem solving, there is outstanding substantive distinguishing features and significant progressive, meet the 3rd section of the 22nd article of Patent Law about creationary regulation.
Brief description of the drawings
Fig. 1 is the present invention's stereogram of strong obturation structure such as not.
Fig. 2 is the present invention's Specific construction schematic diagram of strong obturation structure such as not.
Number in the figure represents respectively: 1-lower floor obturation, 2-upper strata obturation, 3-pulp shooting machine, the 4-pipeline of whitewashing, 5-advance support, 6-work plane hydraulic prop, 7-work plane, 8-filling template, 9-Liu lane, 10-does not wait strong combination obturation, 11-wooden prop, 12-goaf, 13-temporary lining, 14-Lagging support.
Detailed description of the invention
With reference to the accompanying drawings structure of the present invention and Specific construction mode are elaborated.
The first step: after underworkings excavation, carry out anchor, rope, net, band supporting and 6 supportings of work plane hydraulic prop, the face of simultaneously assigning a work, mining face under mine 7 starts normal coal cutting, prop drawing after arranging, forms goaf 12 after coal cutting.
Second step: the interior use hydraulic prop in Liu lane 9 adds articulated roof beam supporting as advance support 5, in Liu lane side filling width, carry out support reinforcement with wooden prop 11 again, along with the propelling of work plane, at advance support, 5 places increase hydraulic prop, strengthen as Lagging support 14; Lagging support 14 and wooden prop 11 shareds condense initial stage of front top plate of upper strata obturation press.
The 3rd step: ground starts to get the raw materials ready simultaneously, the fillers such as preparation water, cement, spoil, flyash are transported to and stay in lane, and filler injects in pulp shooting machine 3 and adds water and stir.
The 4th step: install temporary lining 13 and filling template 8 at work plane rear, packed height is h
2filler is injected into and in filling template 8, carries out paste body filling by whitewashing pipeline 4 by pulp shooting machine 3, as the lower floor's obturation 1 in Fig. 1 structure, the filler of lower floor's obturation 1 is 1: 0.3: 0.2 by mass ratio: 0.5: 0.2: 0.3: 0.6 water, cement, waste gypsum, blast-furnace cinder, spent lime, flyash and spoil powder mixture form; Require the compressive strength of paste body filling walling material can reach 5-10MPa in 1 day, within 3 days, can reach 10-20MPa, within 7 days, can reach 20-28MPa, within 28 days, can reach 30-35MPa.
The 5th step: after the paste body filling body of lower floor's obturation 1 solidifies, filling waste rock bag close-packed arrays, be stacked to top board on paste body filling body, the upper strata obturation 2 of filling structure in formation Fig. 1; Mass ratio is housed is water, cement and the broken spoil mixture of 1: 1.7: 5 in spoil bag, 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.In the present embodiment Fig. 1, spoil bag is only decorated with one deck, and in Practical Project, the number of plies that spoil bag need to be piled up need be determined according to the packed height of the compacted depth after material final set in spoil bag and spoil bag.
The 6th step: after the spoil bag for the treatment of upper strata obturation 2 solidifies 2-3 days, remove temporary lining 13, the simultaneously Lagging support 14 of other both sides, Chu lane outside the scope of 200 meters, recovery operation face rear, upper strata obturation 2 and lower floor's obturation 1 form not waiting shown in Fig. 2 and combine by force obturation 10.
The 7th step: meanwhile, along with the advance of the face repeats above-mentioned steps two to step 6.
Construction method of the present invention is particularly useful for 1.3 meters of following girdle constructions.
Claims (2)
1. the other pressure that allows in right amount in gob side entry retaining lane does not wait a strong combination filling structure, is combined by upper and lower two-layer obturation, and upper strata obturation adopts the large filler of the low deflection of intensity, and the higher filler of lower floor's obturation employing intensity, is characterized in that:
Described upper strata obturation packed height is h
1it is to pile up with the wide spoil bag for 0.4-0.6 rice, long 1.2-1.5 rice, mass ratio be housed be water, cement and the broken spoil mixture of 1: 1.7: 5 in spoil bag, requiring this mixture initial setting time is 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;
Described lower floor's obturation is a paste body filling wall, and packed height is h
2, paste body filling wall is 1: 0.3: 0.2 by mass ratio: 0.5: 0.2: 0.3: 0.6 water, cement, waste gypsum, blast-furnace cinder, spent lime, flyash and spoil powder mixture form; Require the compressive strength of paste body filling walling material within 1 day, to reach 5-10MPa, within 3 days, reach 10-20MPa, within 7 days, reach 20-28MPa, within 28 days, reach 30-35Mpa;
Above-mentioned packed height h
1and h
2determined by following methods:
The first step: according to mining height value and the actual sedimentation value S of immediate roof THICKNESS CALCULATION rock beam
a
S
A=h-m
z(K
A-1)
In formula:
H-mining height;
M
z-immediate roof thickness;
K
a-rock beam touches the broken swollen coefficient of Yi Mao rock stratum, bottom, cash place, gets 1.25-1.35;
Second step: according to the actual sedimentation value S of rock beam
acalculate upper strata obturation packed height h
1
h
1=α
0S
A／α
In formula:
α-upper strata obturation allows pressure coefficient, gets 0.2;
α
0-allow pressure safety factor, get 1.5;
The 3rd step: according to mining height h and upper strata obturation height h
1calculate the obturation packed height h of lower floor
2
h
2=h-h
1。
2. the construction method of filling structure as claimed in claim 1, is characterized in that, step is as follows:
The first step: carry out anchor, rope, net, band supporting and work plane hydraulic prop (6) supporting after underworkings excavation, the face of simultaneously assigning a work, mining face under mine (7) starts normal coal cutting, prop drawing after arranging, forms goaf (12) after coal cutting;
Second step: use hydraulic prop to add articulated roof beam supporting as advance support (5) in Liu lane (9), in Liu lane side filling width, use again wooden prop (11) to carry out support reinforcement, along with the propelling of work plane, locate to increase hydraulic prop at advance support (5), strengthen as Lagging support (14); Lagging support (14) and wooden prop (11) shared condense initial stage of front top plate of upper strata obturation press;
The 3rd step: ground starts to get the raw materials ready simultaneously, preparation filler is transported to and stays in lane, and filler injects in pulp shooting machine (3) and adds water and stir;
The 4th step: install temporary lining (13) and filling template (8) at work plane rear, packed height is h
2, the filler of lower floor's obturation is injected in filling template (8) and carries out paste body filling by whitewashing pipeline (4) by pulp shooting machine (3), as lower floor's obturation (1);
The 5th step: after the paste body filling body of lower floor's obturation (1) solidifies, filling waste rock bag close-packed arrays, be stacked to top board on paste body filling body, forms upper strata obturation (2);
The 6th step: after the spoil bag for the treatment of upper strata obturation (2) solidifies 2-3 days, remove temporary lining (13), the simultaneously Lagging support (14) of other both sides, Chu lane outside the scope of 200 meters, recovery operation face rear, upper strata obturation (2) and lower floor's obturation (1) form not etc. and to combine by force obturation (10);
The 7th step: meanwhile, along with the advance of the face repeats above-mentioned steps two to step 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210158287.1A CN102705002B (en) | 2012-05-12 | 2012-05-12 | Roadside proper yielding unequal combined filling structure of gob-side entry retaining and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210158287.1A CN102705002B (en) | 2012-05-12 | 2012-05-12 | Roadside proper yielding unequal combined filling structure of gob-side entry retaining and construction method |
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| Publication Number | Publication Date |
|---|---|
| CN102705002A CN102705002A (en) | 2012-10-03 |
| CN102705002B true CN102705002B (en) | 2014-08-06 |
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| CN201210158287.1A Expired - Fee Related CN102705002B (en) | 2012-05-12 | 2012-05-12 | Roadside proper yielding unequal combined filling structure of gob-side entry retaining and construction method |
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| CN103089298B (en) * | 2013-01-23 | 2014-11-19 | 中国矿业大学 | Structure and method for building side direction multicolumn gob-side entry retaining filling wall body |
| CN103161480B (en) * | 2013-03-14 | 2015-12-09 | 中国矿业大学 | Initiatively support the method for roadside packing gob side entry retaining |
| 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 |
| CN103485820B (en) * | 2013-10-09 | 2016-03-30 | 山东科技大学 | Ya Hu lane filled wall and construction method thereof is allowed without coal column filling mining flexibility |
| CN105134287B (en) * | 2015-08-31 | 2017-03-08 | 山东科技大学 | A kind of prearrangement of deformation amount stage type classification allows presses gob side entry retaining road-in packing and its construction method |
| CN105569726A (en) * | 2015-12-31 | 2016-05-11 | 山东深博巷道支护技术有限公司 | Gob-side entry retaining method for GFRP (Glass Fiber Reinforced Polymer) tube concrete pier stud and gangue concrete wall |
| CN106988744B (en) * | 2017-04-05 | 2019-01-04 | 华北科技学院 | A kind of lane side " prop-obturation " coordination supporting gob-side entry retaining method |
| CN109915138B (en) * | 2019-03-26 | 2021-03-30 | 中国矿业大学(北京) | Easy-to-self-fire coal layer top-cutting self-tunneling coal-pillar-free mining method |
| CN110284924B (en) * | 2019-06-25 | 2021-05-04 | 河南理工大学 | Fully mechanized caving face gob-side entry retaining multi-layer filling body bearing structure and supporting method |
| CN110486082B (en) * | 2019-09-09 | 2021-06-15 | 河北充填采矿技术有限公司 | Method for alternately filling different materials in goaf |
| CN111980747B (en) * | 2020-09-04 | 2022-04-12 | 山西天地煤机装备有限公司 | Gob-side entry retaining roadside filling support method |
| CN112174608A (en) * | 2020-09-30 | 2021-01-05 | 王立强 | Gob-side entry retaining filling material for thin coal seam and medium-thickness coal seam and preparation method thereof |
| CN113969802B (en) * | 2021-03-27 | 2023-09-08 | 西安科技大学 | Filling height analysis method of filling body in combined filling mining |
| CN113107587B (en) * | 2021-04-19 | 2022-06-07 | 太原理工大学 | Coal mine cemented filling device and method for directionally arranging coal gangue aggregates |
| CN113292306A (en) * | 2021-07-01 | 2021-08-24 | 贵州理工学院 | Roadside filling material |
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