CN112360462A - Mining process for filling and grouting short-wall fully-mechanized mining gangue - Google Patents
Mining process for filling and grouting short-wall fully-mechanized mining gangue Download PDFInfo
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- CN112360462A CN112360462A CN202011502012.6A CN202011502012A CN112360462A CN 112360462 A CN112360462 A CN 112360462A CN 202011502012 A CN202011502012 A CN 202011502012A CN 112360462 A CN112360462 A CN 112360462A
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- 238000005065 mining Methods 0.000 title claims abstract description 116
- 238000000034 method Methods 0.000 title claims abstract description 44
- 239000011435 rock Substances 0.000 claims abstract description 37
- 239000010878 waste rock Substances 0.000 claims abstract description 29
- 239000003245 coal Substances 0.000 claims abstract description 22
- 239000010881 fly ash Substances 0.000 claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 3
- 239000004568 cement Substances 0.000 claims description 9
- 238000011084 recovery Methods 0.000 claims description 8
- 230000005641 tunneling Effects 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 7
- 239000002893 slag Substances 0.000 claims description 7
- 239000002699 waste material Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 238000005429 filling process Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 239000011449 brick Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 239000002910 solid waste Substances 0.000 abstract description 7
- 238000003825 pressing Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 230000008901 benefit Effects 0.000 description 9
- 239000010883 coal ash Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- -1 washed gangue Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
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Abstract
The invention discloses a mining process for filling and grouting short-wall fully-mechanized mining waste rock, and relates to the field of coal mining. The process designs a mining area with a working face obliquely arranged, and the inclination angle is 8-15 degrees; determining the maximum mining width a of the working face, dividing the mining area into n short-wall working faces along the trend, carrying out jump mining on the working face, and mining and filling gangue in an upward mining and downward filling mode. And (3) arranging grouting pipes along the trend at the bottom plate of the goaf every 15-20 m after the stope face is pushed, performing gob-side entry retaining construction on the return airway, arranging a main grouting pipe connected with the grouting pipes by using the gob-side entry retaining, performing section-by-section under-pressure grouting on the gangue filling area according to the maximum grouting lag distance comprehensively determined by tests, and cementing overlying rock cracks and gangue into an artificial rock mass, wherein the strength of the artificial rock mass is greater than or equal to that of the original coal rock, so that replacement mining of the coal seam is realized, and the purpose of controlling the ground to be not deformed is achieved. The invention has high filling efficiency and low cost, not only disposes the solid wastes such as waste rock, fly ash and the like, but also liberates the 'three-next-to-one-up' coal pressing resource.
Description
Technical Field
The invention relates to the technical field of coal mining, in particular to a mining process for filling and grouting short-wall fully-mechanized coal mining gangue.
Background
With the popularization and attention of the green environmental development mode and the living mode, the mine ecological environment treatment and restoration work develops towards the direction of the 'living community of mountain and water, forest, field, lake and grass'. The underground filling harmless treatment of solid wastes such as mine waste rock, coal ash and the like is combined to control the ground subsidence, so that the dual purposes of protecting ground buildings and structures and treating the solid wastes such as the mine waste rock and the like are achieved, and the underground filling harmless treatment method has remarkable economic, social and environmental benefits. The coal mine underground filling green mining process can be generally divided into the following steps according to filling materials at present: filling solid wastes such as paste, high-water filling, gangue and the like; the paste filling is to fill the crushed waste rock, the power plant fly ash, the cement and the like into a goaf through a ground pumping system after being fully stirred on the ground according to a certain proportion, and has the problems of difficult top control, fine crushing of the underground waste rock, easy blockage of a filling pipeline, complex filling system, difficult operation and management, high filling cost and low filling efficiency; high-water filling, wherein the filling stone body is easy to weather when meeting water, low in strength and easy to generate large subsidence deformation, the settlement reducing rate is 40-50%, and ground buildings and structures are difficult to protect; the waste filling process system of waste rocks and the like is simple, fine crushing is not needed, the filling management is easy, the cost is low, but the top is not good, the filled waste rocks are compacted but still loose and are easy to be compacted and subsided again, so that the ground cannot be controlled to be not subsided by waste rock filling, the ground subsidence coefficient is still between 0.2 and 0.4 according to the current domestic and foreign research results, and the ground buildings are difficult to be guaranteed not to be damaged. A filling mining process which controls the ground not to deform, has high efficiency and low cost is sought to solve the technical problem that the mining under the building is urgent to solve.
Disclosure of Invention
In order to solve the technical problems, the invention provides a short-wall fully-mechanized gangue filling and grouting mining process, which achieves the purposes of controlling the ground to be not deformed and protecting ground buildings and structures, simultaneously disposes solid wastes such as coal gangue, coal ash and the like in a mining area, and improves the filling and mining efficiency.
In order to realize the technical purpose, the invention adopts the following scheme: the mining process for filling and grouting the short-wall fully-mechanized mining gangue comprises the following steps of:
step one, designing a waste filling and grouting mining area with an inclined length LqRun length of LzThe inclination or pseudo-inclination angle of the mining area is 8-15 degrees;
step two, according to a key layer theory and a mining subsidence theory, combining geological mining conditions, calculating and determining the maximum mining width a of the short-wall working face, and dividing the short-wall working face into n = L along the trend directionzA working faces inclined upward are numbered sequentially from the main conveying lane to the main return airway of the mining area, and the numbers are numbered from (i), (ii) and (iii) … …;
tunneling a short-wall working face return airway and a transportation airway to a designed distance L along the inclination directionqTunneling and laying cutting holes to form a return air and transportation system on the working surface;
and step four, performing mining while filling gangue and lagging under-pressure grouting operation from the working face No. I:
(1) the working face is pushed forward from the cut hole to carry out mining operation;
(2) a filling hydraulic support with a tamping mechanism is used for carrying out a gangue filling process of face-up mining and face-down filling, and the gangue filling rate is controlled to be more than 85%;
(3) implementing a lagging pressurized grouting process on the filling waste rock to ensure that the damaged overlying rock and the filling waste rock are cemented into an artificial rock mass to replace the original coal rock support overlying strata: when the working face is pushed forwards from the cutting hole, grouting perforated pipes are pre-distributed on a goaf bottom plate behind the gangue filling support every 15-20 m; when the working face is pushed to 30-40 m, connecting a main grouting pipe arranged in the return airway with a main grouting pipe, grouting the first section of gangue filling goaf, and stopping grouting after the designed grouting pressure is reached to 2-5 MPa;
(4) along with the forward propulsion of the working face, sequentially carrying out gangue filling-grouting until the working face is pushed to a set mining stop line, and finishing the recovery and gangue filling-grouting operation of the No. I working face;
step five, adopting a jump mining method to carry out mining-filling-grouting operation on the working face No. IV or No. V with the distance of 2-3 working faces, wherein the mining method is the same as the step four;
step six, after the recovery-filling-grouting operation of the working face No. IV or No. V is finished, returning to the working face No. II, and the mining method is the same as the step four; and (4) taking one cycle for every six or eight working faces, and stopping mining, filling and grouting by the n working faces in the whole mining area according to the mining sequence.
Compared with the prior art, the invention has the beneficial effects that:
1) the method comprises the steps of directly filling a goaf without fine breaking of underground tunneling waste rock and washing and dressing waste rock, then performing grouting at a certain distance after lagging, wherein a grouting material is prepared from fly ash and slag cement, performing pressurized grouting to fill gaps and top gaps of the waste rock and damaged cracks of overlying rock layers such as a direct roof, an old roof and the like damaged by mining subsidence below a selected sub-key layer, and thus forming an artificial filling cemented rock body with concrete-like characteristics formed by cementing of the waste rock, the fly ash, the cement and the damaged overlying rock in the goaf, wherein the compressive strength of the artificial filling cemented rock body is equal to or higher than that of the mined rock.
2) The method is characterized in that a key layer theory and a mining subsidence theory are adopted, the maximum width a of a filling working face is determined, a sub-key layer is selected, the sub-key layer is controlled not to be broken in the process of mining, filling and grouting of the filling working face, the damage height of overlying strata caused by mining is controlled to be below the sub-key layer, the purposes of controlling the ground not to deform and reducing the mine pressure of the working face are achieved, gangue filling and tamping are facilitated, conditions are created for mining and filling coordination, and the mining and filling efficiency is improved.
3) The gob-side entry retaining is carried out on the gangue filling goaf, the hysteresis pressurized grouting operation for filling gangue is better and easier to implement, the grouting effect is easy to monitor, the tunneling work is reduced for the preparation of the next filling working face, the mining, filling and grouting efficiency is greatly improved, the mining and filling grouting cost is reduced, and the filling mining benefit is improved.
4) The underground gangue is prevented from lifting and going to the well, the gangue is discharged from a dump, the land is occupied, the environment is damaged, and meanwhile, solid wastes such as washed gangue, coal ash and the like are treated, so that the foundation is laid for the green development of mines.
5) The method has the advantages of solving the problems of 'three next to one top' coal pressing and industrial and mining coal pillar recovery, protecting mineral resources, improving mine benefits, prolonging service life of mines, and realizing organic integration of green filling mining and 'three next to one top' coal pressing mining.
The preferred scheme of the invention is as follows:
and in the second step, the maximum mining width a of the working face is selected to ensure that the sub-key layer is not broken in the mining process, and meanwhile, a water guide crack zone formed in the mining process is arranged below the sub-key layer so as to control the damage height of the overlying strata, so that waste rock filling is facilitated, and deformation of the overlying strata is controlled not to reach the ground.
And in the fourth step, the return airway adopts a gob-side entry retaining process, the gob-side entry retaining adopts brick wall retaining to realize the operations of lagging section-by-section grouting, water drainage, mine pressure monitoring and overlying rock deformation in the entry retaining, and the gob-side entry retaining is used as a transport airway of the next working face, so that the working face tunneling workload is reduced, and the filling mining efficiency and benefit are improved.
The grouting floral tube is arranged perpendicular to the advancing direction of the working face, and a reserved interface of the grouting floral tube is connected with a grouting main tube arranged on the gob-side entry retaining.
The maximum lagging distance of grouting is comprehensively determined through tests, so that the goaf filled with the gangue can be effectively and timely grouted, the mining of the front working face is not influenced, and a certain pressure is guaranteed in the grouting area.
The method for implementing the lagging pressurized grouting on the side mining and side filling of the waste rock comprises the steps of mixing fly ash and slag cement as grouting materials, preparing the mixture according to the mass ratio of the slag cement to the fly ash of 2: 3-2: 8, enabling the artificial rock mass formed after the grouted waste rock is cemented to be equal to or larger than the strength of the original coal rock, and enabling the water precipitation rate after the waste rock is filled to be the lowest by adopting the mass ratio of water to solid of 0.6-0.8: 1, and meanwhile ensuring that the waste rock can be effectively grouted.
And in the fourth step, 2 grouting floral tubes are pre-arranged, wherein one grouting floral tube is used for standby, so that the grouting floral tubes are prevented from being damaged when the waste rocks are filled.
Drawings
Fig. 1 is a working face layout diagram of a mining area provided by an embodiment of the present invention;
fig. 2 is a schematic diagram of arrangement of a reserved grouting floral tube provided by the embodiment of the invention.
Detailed Description
The present invention will be described in detail with reference to the following embodiments in order to fully understand the objects, features and effects of the invention, but the present invention is not limited thereto.
Referring to fig. 1 and 2, the mining process of filling and grouting the short-wall fully-mechanized mining gangue provided by the invention comprises the following steps:
step one, designing a waste filling and grouting mining area with an inclined length LqRun length of LzAnd the inclination of the mining area or the pseudo-inclination angle is controlled to be 8-15 degrees, so that a ventilation and transportation system is formed.
Step two, according to a key layer theory, a mining subsidence theory and geological mining conditions, calculating and determining the maximum mining width a of the short-wall working face, and dividing the short-wall working face into n = L along the trend directionzA work faces inclined upward are numbered sequentially from the main conveying lane to the main return air lane of the mining area, and the numbers are (i), (ii) and (iii) … ….
Tunneling a short-wall working face return airway and a transportation airway to a designed distance L along the inclination directionqAnd tunneling, arranging and cutting holes, and forming a complete air return and transportation system on the working surface. Meanwhile, the return airway adopts gob-side entry retaining process arrangement. Gob-side entry retaining tunnel, (one) is used as a sectional grouting tunnel of the working face, (two) is used as a grouting drainage tunnel of the working face, (three) is used as a stoping transportation tunnel of the next working face, and (four) is used as a stoping transportation tunnel of the next working faceThe filling, grouting and mine pressure and overburden rock damage monitoring roadway has multiple purposes, and the filling and mining efficiency and benefit are improved.
And step four, performing mining while filling gangue and lagging under-pressure grouting operation from the working face No. I:
(1) the width range of the working face is controlled, and a short-wall coal mining machine is selected to advance mining operation from the hole cutting.
(2) And (3) for the mined-out area, performing a gangue filling process of face-up mining and face-down filling by using a filling hydraulic support with a tamping mechanism, and controlling the gangue filling rate to be more than 85%.
(3) When the working face is pushed forwards from the cutting hole, 2 grouting floral tubes are pre-arranged on a goaf bottom plate behind the gangue filling support perpendicular to the pushing direction of the working face every 15-20 m of pushing, and the floral tubes are prevented from being damaged when the gangue is filled. And when the working face is pushed to 30-40 m, connecting a main grouting pipe arranged in the return airway with the first embedded perforated pipe, grouting the first section of gangue filling goaf, and stopping grouting after the designed grouting pressure is reached to 2-5 MPa.
(4) And meanwhile, the filling waste rock is subjected to lagging section-by-section grouting, so that the damaged overlying strata and the filling waste rock are cemented into an artificial rock mass to replace the original coal rock support overlying strata. Therefore, the roof and the overlying strata of the working face are slightly damaged, and the damage of the overlying strata can be controlled below the sub-critical layer, so that the movement of the overlying strata is not affected to the ground, and the aim of controlling the ground not to deform is fulfilled.
(5) And (4) sequentially filling gangue and grouting the goaf until the working face is pushed to a set stoping line along with the forward pushing of the working face. And finishing the recovery and gangue filling and grouting of the No. I working face.
And step five, adopting a jump mining construction method, after the mining of the working face No. I is finished, carrying out mining-filling-grouting operation on the working face No. II or No. V separated from the working face No. II or No. V, wherein the mining method is the same as the step four.
And step six, after the recovery, filling and grouting of the No. four or No. five working faces are finished, returning to the recovery No. two working faces, wherein the recovery method is the same as the step four, every six or eight working faces are in a cycle, and the recovery, filling and grouting of the n working faces in the whole mining area are finished according to the mining sequence.
And in the second step, the maximum mining width a of the working face is selected by applying a key layer and a mining subsidence theory. The maximum mining width a of the selected working face is to ensure that the sub-key layer is not broken in the mining process, and meanwhile, a water guide crack zone formed in the mining process is arranged below the sub-key layer so as to control the damage height of the overlying strata, facilitate gangue filling and control the deformation of the overlying strata not to reach the ground.
And in the fourth step, the gob-side entry retaining adopts a brick wall retaining method, so that the lagging and section-by-section grouting, water drainage, mine pressure monitoring and overlying rock deformation are carried out in the entry retaining, and the entry retaining is finally used as a transport lane of the next working face, the working face tunneling workload is reduced, and the filling mining efficiency and benefit are improved.
In the process of mining and filling the gangue on the working face, grouting perforated pipes are pre-arranged on a goaf bottom plate behind a gangue filling support every 15-20 m and are arranged perpendicular to the advancing direction of the working face, and reserved interfaces are connected with main grouting pipes arranged along a gob-side entry retaining way.
The maximum lagging distance of grouting is comprehensively determined in an experiment, so that the goaf filled with the waste rock can be effectively and timely grouted, the exploitation of a front working face is not influenced, a certain pressure of a grouting zone is ensured, the slightly fractured overburden rock can be effectively grouted, the grouting zone and the filling waste rock grouting body are cemented into an artificial rock mass, the strength of the artificial rock mass is equal to or greater than that of the original coal rock, the original coal rock is replaced to support the overburden rock mass, the replacement exploitation is realized, and the purpose of no deformation of the ground is controlled.
The method is implemented by implementing lagging pressurized grouting on the side mining and filling waste rock, the grouting material is prepared from fly ash and slag cement according to the mass ratio of the slag cement to the fly ash of 2: 3-2: 8, the artificial rock mass formed after the grouted waste rock is cemented is equal to or greater than the original coal rock strength, and meanwhile, the water-solid mass ratio of 0.6-0.8: 1 is adopted, so that the water precipitation rate after the waste rock is filled is the lowest, and the waste rock can be effectively grouted.
According to the mining subsidence theory, jump mining is carried out on the working face at intervals of 2-3 working faces, so that sufficient maintenance time can be guaranteed for the filling grouting working face, cemented artificial rock bodies can reach the design strength, meanwhile, the jump mining interval coal pillars can support overlying strata, and the ground is controlled not to deform.
The invention has the advantages of low investment, high filling efficiency, low cost and easy management of a filling system, can solve the problems of top binding, low compactness and large ground subsidence of the gangue filling, not only disposes the solid wastes such as the gangue, the fly ash and the like, but also liberates the 'three-next-to-one' coal pressing resource, and has remarkable social, environmental and economic benefits.
Finally, it is noted that: the above-mentioned list is only the preferred embodiment of the present invention, and naturally those skilled in the art can make modifications and variations to the present invention, which should be considered as the protection scope of the present invention provided they are within the scope of the claims of the present invention and their equivalents.
Claims (7)
1. A mining process for filling and grouting short-wall fully-mechanized mining waste rock is characterized by comprising the following steps of:
step one, designing a waste filling and grouting mining area with an inclined length LqRun length of LzThe inclination or pseudo-inclination angle of the mining area is 8-15 degrees;
step two, according to a key layer theory and a mining subsidence theory, combining geological mining conditions, calculating and determining the maximum mining width a of the short-wall working face, and dividing the short-wall working face into n = L along the trend directionzA working faces inclined upward are numbered sequentially from the main conveying lane to the main return airway of the mining area, and the numbers are numbered from (i), (ii) and (iii) … …;
tunneling a short-wall working face return airway and a transportation airway to a designed distance L along the inclination directionqTunneling and laying cutting holes to form a return air and transportation system on the working surface;
and step four, performing mining while filling gangue and lagging under-pressure grouting operation from the working face No. I:
(1) the working face is pushed forward from the cut hole to carry out mining operation;
(2) a filling hydraulic support with a tamping mechanism is used for carrying out a gangue filling process of face-up mining and face-down filling, and the gangue filling rate is controlled to be more than 85%;
(3) implementing a lagging pressurized grouting process on the filling waste rock to ensure that the damaged overlying rock and the filling waste rock are cemented into an artificial rock mass to replace the original coal rock support overlying strata: when the working face is pushed forwards from the cutting hole, grouting perforated pipes are pre-distributed on a goaf bottom plate behind the gangue filling support every 15-20 m; when the working face is pushed to 30-40 m, connecting a grouting pipe arranged in the return airway with a grouting floral tube, grouting the first section of gangue filling goaf, and stopping grouting after the designed grouting pressure is reached to 2-5 MPa;
(4) along with the forward propulsion of the working face, sequentially carrying out gangue filling-grouting until the working face is pushed to a set mining stop line, and finishing the recovery and gangue filling-grouting operation of the No. I working face;
step five, adopting a jump mining method to carry out mining-filling-grouting operation on the working face No. IV or No. V with the distance of 2-3 working faces, wherein the mining method is the same as the step four;
step six, after the recovery-filling-grouting operation of the working face No. IV or No. V is finished, returning to the working face No. II, and the mining method is the same as the step four; and (4) taking one cycle for every six or eight working faces, and stopping mining, filling and grouting by the n working faces in the whole mining area according to the mining sequence.
2. The process of claim 1, wherein the selection of the maximum face mining width a in the second step ensures that the sub-critical layer is not broken during mining, and the water-guiding fracture zone formed during mining is below the sub-critical layer.
3. The mining process for controlling the ground non-deformation by the short-wall fully-mechanized gangue filling and grouting according to claim 1, wherein the return airway in the fourth step adopts a gob-side entry retaining process, the gob-side entry retaining adopts a brick wall-building entry retaining method, and the gob-side entry retaining is used as a main grouting pipeline for laying, a cover rock deformation monitoring after grouting and a transportation lane of a next working face.
4. The mining process of short-wall fully-mechanized gangue filling and grouting control ground surface non-deformation according to claim 1, characterized in that a grouting floral tube is arranged perpendicular to the advancing direction of a working surface, and a reserved interface of the grouting floral tube is connected with a grouting main pipe arranged in a gob-side entry retaining.
5. The process for mining short-wall fully-mechanized gangue filling and grouting control ground surface non-deformation according to claim 1, characterized in that a test comprehensively determines the maximum lagging distance of grouting, so that the filled gangue can be effectively and timely grouted, and the grouting does not affect the normal mining of the front working face.
6. The mining process for controlling ground non-deformation through short-wall fully-mechanized gangue filling and grouting according to claim 1, characterized in that a grouting material is prepared by mixing fly ash and slag cement according to the mass ratio of 2: 3-2: 8 of the slag cement to the fly ash, and meanwhile, the water-solid mass ratio of 0.6-0.8: 1 is adopted, and the strength of an artificial rock body formed by cementing the grouted gangue is equal to or greater than that of an original coal rock.
7. The mining process of short-wall fully-mechanized gangue filling and grouting control ground surface non-deformation according to claim 1, characterized in that the number of the grouting floral tubes pre-arranged in the fourth step is 2, and one of the floral tubes is used as a spare.
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| CN113266357A (en) * | 2021-07-01 | 2021-08-17 | 天津美腾科技股份有限公司 | Tunneling process for combining and replacing coal pillar in longwall retreating coal mining crossheading tunneling |
| CN113339052A (en) * | 2021-05-24 | 2021-09-03 | 中国矿业大学 | High-water-material grout stopping wall goaf filling method |
| CN113339056A (en) * | 2021-06-24 | 2021-09-03 | 中国矿业大学 | Fluidized gangue layer surface subsequent filling system and method |
| CN113339053A (en) * | 2021-06-07 | 2021-09-03 | 山东康格能源科技有限公司 | Fully mechanized caving mining filling process for coal mine |
| CN113586139A (en) * | 2021-07-28 | 2021-11-02 | 北京文鼎兴源工程科技有限公司 | Combined construction process for throwing waste filling and pipeline grouting cementing |
| CN113605970A (en) * | 2021-08-30 | 2021-11-05 | 中国矿业大学 | Overlying strata isolation grouting filling method for coal gangue underground emission reduction |
| CN113700527A (en) * | 2021-08-30 | 2021-11-26 | 中国矿业大学 | High-strength coal gangue overlying rock isolation grouting filling green mining method for mining working face |
| CN114198143A (en) * | 2021-12-27 | 2022-03-18 | 徐州格润矿山技术开发有限公司 | Method for reducing stress concentration by coal gangue grouting filling |
| CN114370301A (en) * | 2022-01-12 | 2022-04-19 | 内蒙古鄂托克旗昊源煤焦化有限责任公司 | Energy-saving grouting mining system based on automatic detection of coal seam inclination |
| CN114673550A (en) * | 2022-03-31 | 2022-06-28 | 中国矿业大学(北京) | Waste rock treatment method for continuous filling mining |
| CN115203852A (en) * | 2022-07-25 | 2022-10-18 | 中国矿业大学 | Method for determining grouting time of coal mining subsequent space gangue |
| CN115199328A (en) * | 2022-07-25 | 2022-10-18 | 中国矿业大学 | Coal mining subsequent space gangue grouting filling engineering design method |
| CN113586139B (en) * | 2021-07-28 | 2024-06-11 | 北京文鼎兴源工程科技有限公司 | Waste rock throwing filling and pipeline grouting cementing combined construction process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806226A (en) * | 2010-03-19 | 2010-08-18 | 中国矿业大学 | Mined out space dam-type filling method |
| CN102562069A (en) * | 2012-03-01 | 2012-07-11 | 肥城曹庄煤矿有限公司 | Fluid filling and replacement mining technology for coal bed on highly confined water body |
| CN108222938A (en) * | 2018-02-07 | 2018-06-29 | 西安科技大学 | A kind of large-inclination-angle coal bed goaf combination grouting filling recovery method |
-
2020
- 2020-12-18 CN CN202011502012.6A patent/CN112360462B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806226A (en) * | 2010-03-19 | 2010-08-18 | 中国矿业大学 | Mined out space dam-type filling method |
| CN102562069A (en) * | 2012-03-01 | 2012-07-11 | 肥城曹庄煤矿有限公司 | Fluid filling and replacement mining technology for coal bed on highly confined water body |
| CN108222938A (en) * | 2018-02-07 | 2018-06-29 | 西安科技大学 | A kind of large-inclination-angle coal bed goaf combination grouting filling recovery method |
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| CN114370301A (en) * | 2022-01-12 | 2022-04-19 | 内蒙古鄂托克旗昊源煤焦化有限责任公司 | Energy-saving grouting mining system based on automatic detection of coal seam inclination |
| CN114673550A (en) * | 2022-03-31 | 2022-06-28 | 中国矿业大学(北京) | Waste rock treatment method for continuous filling mining |
| CN115199328A (en) * | 2022-07-25 | 2022-10-18 | 中国矿业大学 | Coal mining subsequent space gangue grouting filling engineering design method |
| CN115203852A (en) * | 2022-07-25 | 2022-10-18 | 中国矿业大学 | Method for determining grouting time of coal mining subsequent space gangue |
| CN115203852B (en) * | 2022-07-25 | 2024-05-14 | 中国矿业大学 | Method for determining grouting time of space gangue after coal mining |
| CN115199328B (en) * | 2022-07-25 | 2024-05-28 | 中国矿业大学 | Design method for grouting filling engineering of space gangue after coal mining |
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