CN114017108B - Gangue functional type partial filling coal mine underground reservoir - Google Patents
Gangue functional type partial filling coal mine underground reservoir Download PDFInfo
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- CN114017108B CN114017108B CN202111300764.9A CN202111300764A CN114017108B CN 114017108 B CN114017108 B CN 114017108B CN 202111300764 A CN202111300764 A CN 202111300764A CN 114017108 B CN114017108 B CN 114017108B
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- 239000003245 coal Substances 0.000 title claims abstract description 107
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 238000000746 purification Methods 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims abstract description 6
- 239000011435 rock Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 239000010878 waste rock Substances 0.000 claims description 9
- 238000000605 extraction Methods 0.000 claims description 6
- 239000002699 waste material Substances 0.000 claims description 6
- 238000009933 burial Methods 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 4
- 241000668854 Howardia biclavis Species 0.000 abstract 1
- 239000003673 groundwater Substances 0.000 abstract 1
- 238000005065 mining Methods 0.000 description 9
- 239000002351 wastewater Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
-
- 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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/16—Modification of mine passages or chambers for storage purposes, especially for liquids or gases
-
- 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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Sewage (AREA)
Abstract
The utility model provides a gangue function type partial filling colliery underground reservoir, includes coal seam roof, coal seam bottom plate, coal pillar dam body, tunnel, goaf and caving gangue, coal pillar dam body, tunnel and goaf are located between coal seam roof and the coal seam bottom plate, it has filling gangue to fill in the goaf, it is the same to fill gangue particle diameter, the hole between the filling gangue, the hole between the caving gangue is the water storage space, can prevent effectively that the fourth system aquifer oozes under water, the effectual mutual pollution of groundwater that has prevented, shortened the water purification cycle, the underground reservoir is constructed simply, and is less to coal mining scale influence to safe and reliable more.
Description
Technical Field
The invention relates to the technical field of water resource protection, in particular to a gangue functional type partial filling coal mine underground reservoir.
Background
The increase in mining intensity and the advancement of policies for coal removal capacity have led to a new increase in underground mining space and abandoned mines each year in our country. Aiming at the problems of water resource destruction and shortage in western areas (jin shan Mongolian Ning Gan) rich in coal and poor in water in China, a coal mine underground reservoir is generally established to realize water resource protection and utilization, however, for the conditions of thick coal beds and thin bedrock in the western areas, a fourth-system aquifer is inevitably conducted in high-strength stoping, the conventional underground reservoir is not filled with gangue, a caving zone and a fracture zone of a caving goaf are higher in height, water is guided to directly caving on a roof of the coal bed above the goaf and the fracture zone in the later stage, gaps of lump stones among the fracture zones are larger, water of the fourth-system aquifer above the goaf is finally reserved downwards in the underground reservoir, so that mine wastewater and water seepage are mixed below the aquifer, underground water pollution is caused, and the water purification period is prolonged.
Methods for mine water transfer using multiple underground reservoirs have also emerged in the prior art (e.g., CN102926804 a), but wherein the underground reservoirs do not focus on the relationship of the water-conducting fracture zone development height to the aquifer, and the transfer method is based primarily on reducing the impact of the underground reservoirs on mining, and does not involve the relatively closed rock-covering fracture, relatively gangue-functional partial-fill coal mine underground reservoirs proposed in the present invention.
In the prior art (such as CN 109236373A), a method for forming a water storage space of an underground reservoir between mould bag structures in a coal mine goaf space is proposed, but the construction process is complex, and the coal mining footage is seriously affected. Secondly, the membrane bag structure has creep instability risk in the long-term operation process of the underground reservoir, so that the whole underground reservoir has potential safety hazard.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the gangue functional type partial filling coal mine underground reservoir which can effectively prevent the underwater seepage of a fourth system aquifer, effectively prevent the mutual pollution of underground water, shorten the water purification period, has simple structure, has less influence on the coal mining rule and is safer and more reliable.
The invention is realized by the following technical scheme: the utility model provides a gangue functional type part fills colliery underground reservoir, includes coal seam roof, coal seam bottom plate, coal pillar dam body, tunnel, goaf and caving gangue, coal pillar dam body, tunnel and goaf are located between coal seam roof and the coal seam bottom plate, fill gangue in the goaf, the gangue particle diameter is the same fills, the hole between the gangue fills, the hole between the caving gangue is water storage space;
the gangue filling height is related to the thickness of the coal bed, the compression coefficient of the gangue and the vertical distance between the water-bearing layer and the coal bed, and the calculation formula of the filling gangue filling height under the condition of hard overburden is as follows:
the calculation formula of the filling height of the filling gangue under the medium hard overburden rock is as follows:
the calculation formula of the filling height of the filling gangue under the weak overburden rock is as follows:
the calculation formula of the filling height of the filling gangue under the extremely weak overburden rock is as follows:
wherein M is the thickness of the coal seam, lambda is the compression coefficient of the filled gangue, H k Is the vertical distance between the water-bearing layer and the coal seam;
further, the storage capacity of the water storage space is as follows:
wherein H is the filling height of the gangue, M is the thickness of the coal bed, V c To collapse the volume of the belt, lambda is the compression coefficient of the filled gangue, S is the area of the underground reservoir region, lambda 1 For filling the water storage coefficient of the gangue, xi is the broken expansion coefficient of the overlying strata.
Further, the pillar dam width is determined by:
wherein W is the width of the coal pillar dam body, the average volume weight of r overlying strata, and sigma 1max Is the ultimate strength of coal body, H d For the depth of burial of coal seam, Y 1 The width of the yield zone at the side of the coal pillar.
Further, the construction and use method of the gangue functional type partially filled coal mine underground reservoir comprises the following steps:
firstly, coal pillars are used as a dam body, and meanwhile, filling hydraulic supports are used for filling waste rocks with equal particle sizes into goaf parts during coal extraction, and after coal extraction is completed and overlying strata are stable, the coal pillars are used as the dam body, and the partially filled goaf is used as a warehouse body to construct the waste rock functional type partially-filled coal mine underground reservoir;
step two, mine water produced by stoping other working surfaces is discharged into a gangue functional part through a pipeline to fill a coal mine underground reservoir, and the mine water is purified through a standing method;
and thirdly, after mine water in the gangue functional type partial filling coal mine underground reservoir reaches the purification standard, extracting the mine water by utilizing a pipeline for treatment.
The invention has the beneficial effects that: according to the invention, the coal mine is mined, the filling gangue is filled into the goaf, the influence on the coal mining footage is small, and the filled gangue can form effective support after the roof and the fracture zone of the later coal seam collapse, so that the roof and the fracture zone collapse zone of the coal seam cannot collapse too high, gaps among the lump stones of the fracture zone are very small or almost not, the mixed storage of mine water and water purification of an aquifer in the traditional method can be effectively improved, the pollution of underground water is avoided, and the utilization period of the underground water is shortened.
The gap between the filled gangue is a water storage space, and mine waste water can be discharged into the gangue functional part to fill the coal mine underground reservoir through a pipeline in the coal mining process.
The waste can be caused by too high filling gangue, the filling gangue is too low in height, the roof of the coal seam and the fracture zones collapse to be larger in height, and the rock gaps between the fracture zones are relatively larger, so that the water of the fourth-system aquifer cannot be separated from mine waste water, and the blocking effect cannot be achieved.
Drawings
FIG. 1 is a schematic diagram of a cross-sectional structure of a gangue functional type partial-filling coal mine underground reservoir according to embodiment 1 of the present invention;
wherein: 1-filling gangue, 2-goaf, 3-coal seam bottom plate, 4-coal pillar dam body, 5-tunnel, 6-coal seam top plate, 7-fracture zone, 8-aquifer and 9-caving gangue.
Detailed Description
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The coal mine underground reservoir is filled with the gangue functional type part shown in the figure 1, and comprises a coal seam roof 6, a coal seam bottom plate 3, coal pillar dams 4, a roadway 5, goafs 2 and caving gangue 9, wherein the coal pillar dams 4, the roadway 5 and the goafs 2 are positioned between the coal seam roof 6 and the coal seam bottom plate 3, the goafs 2 are filled with filling gangue 1, the filling gangue 1 has the same particle size, and the pores between the filling gangue 1 and the pores between caving gangue 9 are water storage spaces;
the gangue filling height is related to the thickness of the coal bed, the compression coefficient of the gangue and the vertical distance between the water-bearing layer and the coal bed, and the calculation formula of the filling height of the gangue under the hard overburden is as follows:
the calculation formula of the filling height of the filling gangue under the medium hard overburden rock is as follows:
the calculation formula of the filling height of the filling gangue under the weak overburden is as follows:
the calculation formula of the filling height of the filling gangue under the extremely weak overburden rock is as follows:
wherein M is the thickness of the coal seam, lambda is the compression coefficient of the filled gangue, H k Is the vertical distance between the water-bearing layer and the coal seam;
the storage capacity of the water storage space is as follows:
wherein H is the filling height of the gangue, M is the thickness of the coal bed, V c To collapse the volume of the belt, lambda is the compression coefficient of the filled gangue, S is the area of the underground reservoir region, lambda 1 For filling the water storage coefficient of the gangue, xi is the broken expansion coefficient of the overlying strata.
The width of the coal pillar dam is determined by the following formula:
wherein W is the width of the coal pillar dam body, the average volume weight of r overlying strata, and sigma 1max Is the ultimate strength of coal body, H d For the depth of burial of coal seam, Y 1 The width of the yield zone at the side of the coal pillar.
The construction and use method of the gangue functional type partially filled coal mine underground reservoir comprises the following steps:
firstly, coal pillars are used as a dam body, and meanwhile, filling hydraulic supports are used for filling waste rocks with equal particle sizes into goaf parts during coal extraction, and after coal extraction is completed and overlying strata are stable, the coal pillars are used as the dam body, and the partially filled goaf is used as a warehouse body to construct the waste rock functional type partially-filled coal mine underground reservoir;
step two, mine water produced by stoping other working surfaces is discharged into a gangue functional part through a pipeline to fill a coal mine underground reservoir, and the mine water is purified through a standing method;
and thirdly, after mine water in the gangue functional type partial filling coal mine underground reservoir reaches the purification standard, extracting the mine water by utilizing a pipeline for treatment.
The waste can be caused by too high filling gangue, the filling gangue is too low in height, the roof of the coal seam and the fracture zone collapse height are large, and the rock gaps between the fracture zones 7 are relatively large, so that the water of the fourth-system aquifer 8 cannot be separated from mine waste water, and then the waste filling gangue has no effect, and the required gangue filling height can be calculated according to the overlying rock condition, so that the use of the gangue is saved, and the cost is saved.
Taking Shendong mining area Da Liu Dajing field as calculation example 1 -2 The average burial depth of the coal-based stratum is 70m, the overlying rock type is medium hard stratum, and the thickness is 5.3m. The fourth system is updated that the water-rich property of the Toxola Wu Suzu is stronger, and the average burial depth is 30m. Thus the vertical distance H between the water-bearing layer and the coal seam k The value is 40, and M is 5.3; according to formation pressure and gangue compression characteristicsLambda was taken as 0.04. After substitution calculation, the gangue filling height H is more than or equal to 2.5m.
Assume that the mining area S is 60 ten thousand m 2 Volume V of collapse zone c 1008 ten thousand m 3 The crushing expansion coefficient xi of the overlying strata is 1.2, and the water storage coefficient lambda of the filling gangue 1 30 percent, the storage capacity is 239.2 ten thousand m 3 。
Rock stratum volume weight r average 2500kg/m 3 ，Y 1 About 0.00635H d [M-(1-λ)H]，σ 1max About 4rH d The width W of the coal pillar dam body is more than or equal to 4.3m.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.
Claims (2)
1. The utility model provides a gangue function type part fills colliery underground reservoir, includes coal seam roof, coal seam bottom plate, coal pillar dam body, tunnel, goaf and caving gangue, coal pillar dam body, tunnel and goaf are located between coal seam roof and the coal seam bottom plate, its characterized in that: filling waste rock in the goaf, wherein the grain sizes of the waste rock are the same, and the pores between the waste rock and the pores between the collapsed waste rock are water storage spaces;
the gangue filling height is related to the thickness of the coal bed, the compression coefficient of the gangue and the vertical distance between the water-bearing layer and the coal bed, and the calculation formula of the filling gangue filling height under the condition of hard overburden is as follows:
；
the calculation formula of the filling height of the filling gangue under the medium hard overburden rock is as follows:
；
the calculation formula of the filling height of the filling gangue under the weak overburden rock is as follows:
；
the calculation formula of the filling height of the filling gangue under the extremely weak overburden rock is as follows:
；
wherein,Mfor the thickness of the coal seam,for the compression coefficient of the filled gangue,H k for the vertical distance between the aquifer and the coal seam,
the storage capacity of the water storage space is as follows:
wherein,Hthe filling height of the waste rock is set to be the filling height of the waste rock,Mfor the thickness of the coal seam,for collapse of the band volume, < >>For the compression coefficient of the filled gangue,Sis the area of the underground reservoir region->For filling the water storage coefficient of gangue, +.>For the fracture expansion coefficient of the overburden,
the width of the coal pillar dam is determined by the following formula:
wherein,Wis the width of the dam body of the coal pillar,average volume weight of overburden->Is the ultimate strength of the coal body,H d is the depth of burial of the coal bed>The width of the yield zone at the side of the coal pillar.
2. The method for constructing and using the gangue functional type partially filled coal mine underground reservoir as claimed in claim 1, which is characterized by comprising the following steps:
firstly, coal pillars are used as a dam body, and meanwhile, filling hydraulic supports are used for filling waste rocks with equal particle sizes into goaf parts during coal extraction, and after coal extraction is completed and overlying strata are stable, the coal pillars are used as the dam body, and the partially filled goaf is used as a warehouse body to construct the waste rock functional type partially-filled coal mine underground reservoir;
step two, mine water produced by stoping other working surfaces is discharged into a gangue functional part through a pipeline to fill a coal mine underground reservoir, and the mine water is purified through a standing method;
and thirdly, after mine water in the gangue functional type partial filling coal mine underground reservoir reaches the purification standard, extracting the mine water by utilizing a pipeline for treatment.
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| CN202111300764.9A CN114017108B (en) | 2021-11-04 | 2021-11-04 | Gangue functional type partial filling coal mine underground reservoir |
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| CN202111300764.9A CN114017108B (en) | 2021-11-04 | 2021-11-04 | Gangue functional type partial filling coal mine underground reservoir |
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| CN114575847B (en) * | 2022-03-15 | 2023-03-24 | 中国矿业大学(北京) | Shallow coal seam water-retaining mining and underground reservoir construction integrated method |
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| CN101070759A (en) * | 2007-05-04 | 2007-11-14 | 中国矿业大学 | Thin-base-rock shallow coal-layer water-retaining production suitable-condition classification method |
| CN109139109A (en) * | 2018-08-02 | 2019-01-04 | 缪协兴 | A kind of method on the artificial water storage stratum of solid filling coal-mining technique |
| CN109812293A (en) * | 2019-02-18 | 2019-05-28 | 河南理工大学 | It is a kind of to seal CO up for safekeeping using coal mine waste mine goaf2Method |
| CN109973095A (en) * | 2019-05-14 | 2019-07-05 | 中国矿业大学 | A kind of method of coal mine solid filling exploitation reconstruction groundwater storage space |
| RU2735173C1 (en) * | 2020-04-27 | 2020-10-28 | федеральное государственное бюджетное образовательное учреждение высшего образования «Санкт-Петербургский горный университет» | Method for filling of mined-out space during development of gently sloping beds with long pillars |
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- 2021-11-04 CN CN202111300764.9A patent/CN114017108B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101070759A (en) * | 2007-05-04 | 2007-11-14 | 中国矿业大学 | Thin-base-rock shallow coal-layer water-retaining production suitable-condition classification method |
| CN109139109A (en) * | 2018-08-02 | 2019-01-04 | 缪协兴 | A kind of method on the artificial water storage stratum of solid filling coal-mining technique |
| CN109812293A (en) * | 2019-02-18 | 2019-05-28 | 河南理工大学 | It is a kind of to seal CO up for safekeeping using coal mine waste mine goaf2Method |
| CN109973095A (en) * | 2019-05-14 | 2019-07-05 | 中国矿业大学 | A kind of method of coal mine solid filling exploitation reconstruction groundwater storage space |
| RU2735173C1 (en) * | 2020-04-27 | 2020-10-28 | федеральное государственное бюджетное образовательное учреждение высшего образования «Санкт-Петербургский горный университет» | Method for filling of mined-out space during development of gently sloping beds with long pillars |
Non-Patent Citations (1)
| Title |
|---|
| 五沟煤矿含水层下矸石充填开采方案;涂磊;李德成;张国伟;龚鹏;;煤炭科技(第02期);第66、67、73页 * |
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