CN101176400B - New process for recultivating glebe in mine subsidence area - Google Patents
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- CN101176400B CN101176400B CN2006101143807A CN200610114380A CN101176400B CN 101176400 B CN101176400 B CN 101176400B CN 2006101143807 A CN2006101143807 A CN 2006101143807A CN 200610114380 A CN200610114380 A CN 200610114380A CN 101176400 B CN101176400 B CN 101176400B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 74
- 238000005065 mining Methods 0.000 claims abstract description 20
- 239000002352 surface water Substances 0.000 claims abstract description 14
- 235000019738 Limestone Nutrition 0.000 claims description 18
- 239000006028 limestone Substances 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 239000011435 rock Substances 0.000 claims description 3
- 239000002689 soil Substances 0.000 abstract description 9
- 238000010276 construction Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000003860 storage Methods 0.000 abstract description 3
- 230000005484 gravity Effects 0.000 abstract 2
- 239000003245 coal Substances 0.000 description 13
- 229910001566 austenite Inorganic materials 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005086 pumping Methods 0.000 description 3
- 239000010878 waste rock Substances 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000009189 diving Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003657 drainage water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention relates to a new method for the land reclamation of mining cave-in areas, which is mainly characterized in that a drain hole is dug at the surface of a subsidence area to underground water layer, and the surface water of the subsidence area is discharged to the underground water layer through the drain hole. A borehole can be dug at the ground to the underground water layer, and the ground waterlogging is discharged to the underground water layer through the borehole. In general case, the water level of the underground water layer is lower than the lowest elevation of the surface subsidence area, and the ground waterlogging can flow to the borehole by gravity to be discharged to the underground water layer. If necessary, a water pump can be adopted to pump the waterlogging that can not flow to the borehole by gravity to the borehole to be discharged to the underground water layer. The invention has the advantages of simple and convenient construction, low cost, capability to restore the original soil ecological environment, economical and reasonable and good effects; thus the function of the method is not only land reclamation but also underground water storage, facilitating the protection of water resource.
Description
Technical Field
The invention belongs to the technical field of land reclamation in subsidence areas, and particularly relates to a novel method for land reclamation in a mine subsidence area.
Background
The surface of the earth has a plurality of low-lying areas, some areas are natural, and some artificial factors are caused, for example, the ground is collapsed due to underground mining of a mine (mainly coal mine), and when the height of the collapsed ground surface is lower than a surface soil layer diving position or rainfall and ponding in a collapsed area are difficult to discharge, the original fertile field can become swamp or lake. This is certainly a huge waste for the increasingly precious land resources. As the subsidence of many mine subsidence areas is large, the elevation of the subsidence areas is far lower than the elevation of the peripheral earth surface, and the drainage of ditches is difficult to take effect; many collapse areas have large collapse range, and if a water pump and the like are adopted, the drainage cost is high, so that the method is unreasonable in economy.
The existing land reclamation technology mainly adopts a gangue backfilling mode: firstly, filling waste rock into the subsidence area, and then covering soil on the waste rock layer. The problems with this approach are mainly three:
1. the engineering quantity is large, and the cost is high;
2. the backfilling waste rock material is insufficient, and the backfilling and soil covering of all the subsided areas cannot be realized;
3. the surface is covered with soil, the soil quality is difficult to guarantee, and the original soil ecological environment is difficult to recover.
Disclosure of Invention
The invention aims to provide a novel method for land reclamation in a mine subsidence area, which has the advantages of simple and convenient construction, low cost, economy, reasonability and good effect, and can restore the original soil ecological environment.
The purpose of the invention is realized by the following technical scheme:
a novel method for land reclamation in a mine subsidence area is characterized in that a drainage hole is drilled in the ground surface of the subsidence area to reach an underground aquifer, and surface water in the subsidence area is drained to the underground aquifer through the drainage hole.
And a drainage pump is arranged at the inlet of the drainage hole, and is used for forcibly pressing surface water in the subsidence area into an underground aquifer.
A hole sealing steel pipe with a set length and communicated with the drain hole is arranged at the inlet of the drain hole from the ground surface downwards.
The set length of the hole sealing steel pipe meets the following conditions:
the set length of the hole sealing steel pipe is below the loose layer of the stratum, so that accumulated water is prevented from flowing into the loose layer or the water of the loose layer from flowing into the drain hole; or,
if the surface of the subsidence area and the underground water-containing layer comprise a mining layer, the set length of the hole sealing steel pipe is below the mining layer, and the phenomenon that accumulated water flows into the mining layer or water of the mining layer flows into the water drainage hole is avoided.
The aquifer comprises: thick limestone rock stratum, limestone strong stream zone, water guide fault, flexure shaft part, Ordovician limestone stratum or karst collapse column.
And small dams are constructed around the collapse area to prevent water outside the collapse area from flowing into the collapse area.
The collapse area is internally provided with a water guide channel, and accumulated water in the collapse area is guided into the drain hole through the water guide channel.
According to the technical scheme provided by the invention, the novel method for land reclamation of the mine subsidence area has the core that the drainage holes are drilled on the ground surface of the subsidence area to the underground aquifer, and the surface water of the subsidence area is drained to the underground aquifer through the drainage holes. The hole can be drilled from the ground to the underground aquifer, and the surface ponding is discharged to the underground aquifer through the hole. Generally, the water level of the underground aquifer is lower than the lowest elevation of the surface subsidence area, and surface water can automatically flow into the drill hole to be discharged to the underground aquifer. If necessary, a water pump can be used for pumping accumulated water which cannot enter the drill hole from the flowing way to the drill hole and discharging the accumulated water to the underground aquifer. The construction is simple and convenient, the cost is low, the original soil ecological environment can be restored, the economy and the reasonability are realized, and the effect is good.
Drawings
FIG. 1 is a reference diagram of an embodiment of the novel method for land reclamation of the mine subsidence area.
Detailed Description
In order to understand the technical scheme of the invention, the mine stratum structure is introduced firstly. Taking north China coal fields as an example, the general stratum structure form is as follows: the top part is a fourth series loose alluvial deposit, and the lower part of the loose alluvial deposit is bedrock. Bedrock is generally composed of sedimentary sandstone, mudstone, shale, limestone, and the like. Some regions contain coal beds in bedrocks, and most of the northern China coal fields are formed by the rock-charcoal eclipse. On the bottom of the coal bed, a thick layer of Ordovician limestone, called Odovician limestone for short, is generally formed, the thickness of the Odovician limestone layer is from dozens of meters to thousands of meters, the Odovician limestone layer is karst and grows, the water content is rich, and the Odovician water level is generally far lower than the ground surface elevation. Therefore, the lime layer is an ideal underground drainage water storage layer.
The invention relates to a novel method for land reclamation in a mine subsidence area, which is characterized in that a drain hole is drilled on the ground surface of the subsidence area to reach an underground aquifer, and the surface water of the subsidence area is drained to the underground aquifer through the drain hole. The hole can be drilled from the ground to the underground aquifer, and the surface ponding is discharged to the underground aquifer through the hole. Generally, the water level of the underground aquifer is lower than the lowest elevation of the surface subsidence area, and surface water can automatically flow into the drill hole to be discharged to the underground aquifer. If necessary, a water pump can be used for pumping accumulated water which cannot enter the drill hole from the flowing way to the drill hole and discharging the accumulated water to the underground aquifer.
If the water level of the underground aquifer in a certain area or a certain period is higher than the lowest elevation of the surface subsidence area, the surface accumulated water in the subsidence area can be pressed into the drill hole through the water pump and drained to the underground. At this time, a drainage pump is arranged at the inlet of the drainage hole to forcibly press surface water in the subsidence area into the underground aquifer.
Meanwhile, a hole sealing steel pipe with a set length and communicated with the drain hole is arranged at the inlet of the drain hole from the ground surface downwards. The additional arrangement of the hole sealing steel pipe has two functions:
firstly, due to the existence of the loose layer underground, accumulated water can flow into the loose layer during the process of draining water to the underground, or water in the loose layer can flow into the drainage hole, so that the drainage process is influenced. If the set length of the hole sealing steel pipe is below the unconsolidated formation of the stratum, the surface water is directly introduced into the underground water-bearing formation through the hole sealing steel pipe, and the water of the surface water flowing into the unconsolidated formation or the unconsolidated formation can be prevented from flowing into the drainage hole.
Secondly, because a mining layer (coal mining layer) can exist above the underground water-bearing layer of the subsidence area, water possibly flowing into the mining layer or the mining layer in the process of draining water to the underground can flow into the drainage hole, and the drainage process is influenced. If the set length of the hole sealing steel pipe reaches the position below the mining layer, the accumulated water can be prevented from flowing into the mining layer or the water in the mining layer can be prevented from flowing into the water drainage hole.
The above-mentioned aquifer comprises: thick limestone rock stratum, strong-flow zone, water guide fault, flexure shaft part, Ordovician limestone stratum or karst collapse column.
In order to ensure that the collapse area is less affected by surrounding areas and prevent surrounding water from flowing into the collapse area, a dam can be built around the collapse area to prevent water outside the collapse area from flowing into the collapse area. In general, a dam is built around the collapse area enough to prevent water outside the collapse area from flowing into the collapse area during construction.
The invention is described in detail below with respect to the North China coal field as an example:
the invention is applied to the North China coal field (the invention is particularly suitable for the mining area of the plain in the ground), because the coal system strata of the North China coal field are mostly of a rock-charcoal two-stacking system, the Ordovician limestone stratum (called Ordovician limestone for short) with the thickness of dozens of meters to more than one thousand meters is distributed at the lower part of the North China coal field, the Ordovician limestone stratum has karst fractures and develops, the water diversion performance is strong, and the Ordovician limestone stratum is a good aquifer for draining surface water. Meanwhile, the water level of the austenite layer is generally lower than the diving level of the fourth series loose impulse layer. The surface water can be drained automatically to the lime layer.
The invention has the advantages that:
1. only enough drain holes need to be drilled, and the land reclamation cost is lower than that of a backfilling method;
2. full reclamation of land in subsidence areas can be achieved;
3. the original structure and the original ecological system of the land can be kept without adopting a backfilling mode, and the growth of crops is facilitated;
4. when waterlogging, drilling holes for draining water, when drought, drilling holes for pumping water, and the land in the subsided area can become a drought-waterlogging harvest-keeping field;
5. the water is discharged into the ground, a new water supply source for the ground water is provided, and the storage amount and the development and utilization amount of ground water resources are increased;
6. along with the development of social industrial and agricultural production, the development strength of underground water resources is increased, the height of the limestone water level is decreased gradually, and the method has wider practical value and application prospect.
Therefore, the land reclamation with low cost, full area and high quality is realized, the farmer can recover the land, the land compensation of the mine is reduced, and the underground water resource is increased. Economic benefits, especially social benefits are huge, and the popularization and application prospects are wide. And the invention is also applicable to the modification of low-lying areas.
In the embodiment, as shown in fig. 1, the thickness of a coal seam mined in a certain mining area is about 8 meters, the maximum depth of a surface subsidence area is about 7 meters, the depth of a water accumulation in the subsidence area is about 4 meters, the ground elevation is +47 meters, the thickness of an austenite ash layer at the lower part of a coal measure stratum is about 700 meters, the karst development of an austenite ash layer crack is strong in water conductivity, and the water level elevation of the austenite ash layer is +34.0 meters, and according to the above conditions, the minimum elevation of the surface subsidence area after mining is +40 meters and is 6 meters higher than the water level of the austenite ash layer. So that the self-draining can be achieved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (4)
1. A new method for land reclamation of mine subsidence areas is characterized in that:
digging a drain hole on the ground surface of the subsidence area to an underground aquifer, and draining the surface water of the subsidence area to the underground aquifer through the drain hole;
a hole sealing steel pipe with a set length and communicated with the drain hole is arranged at the inlet of the drain hole downwards from the ground surface;
the set length of the hole sealing steel pipe meets the following conditions:
the set length of the hole sealing steel pipe is below the loose layer of the stratum, so that accumulated water is prevented from flowing into the loose layer or the water of the loose layer from flowing into the drain hole; or if the surface of the subsidence area and the underground water-containing layer comprise a mining layer, the set length of the hole-sealing steel pipe is below the mining layer, and the accumulated water is prevented from flowing into the mining layer or the water in the mining layer from flowing into the drainage hole;
the aquifer comprises: thick limestone rock stratum, limestone strong stream zone, water guide fault, flexure shaft part, Ordovician limestone stratum or karst collapse column.
2. The new method for the land reclamation of the mine subsidence area as claimed in claim 1, wherein a drainage pump is arranged at the inlet of the drainage hole to forcibly press the surface water of the subsidence area into the underground aquifer.
3. The method for the land reclamation of the mine subsidence area as claimed in claim 1, wherein small dams are constructed around the subsidence area to prevent water outside the subsidence area from flowing into the subsidence area.
4. The method for reclaiming land in the subsidence area of the mine as claimed in claim 1, wherein a water guide channel is arranged in the subsidence area, and accumulated water in the subsidence area is guided into the drainage hole through the water guide channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101143807A CN101176400B (en) | 2006-11-08 | 2006-11-08 | New process for recultivating glebe in mine subsidence area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2006101143807A CN101176400B (en) | 2006-11-08 | 2006-11-08 | New process for recultivating glebe in mine subsidence area |
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| CN101176400A CN101176400A (en) | 2008-05-14 |
| CN101176400B true CN101176400B (en) | 2011-06-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101953245B (en) * | 2010-08-13 | 2012-07-04 | 中国矿业大学(北京) | Reclamation method of subsided farm land after earthquake disaster |
| CN102067752A (en) * | 2010-09-29 | 2011-05-25 | 成松桥 | Perforation water storage method for improving stratum water storage capacity, increasing groundwater resources and preventing drought |
| CN102204433A (en) * | 2011-05-16 | 2011-10-05 | 江西省水利规划设计院 | Tiling-process cultivated soil protection construction method for land consolidation and field raise engineering |
| CN102380506A (en) * | 2011-09-26 | 2012-03-21 | 中山大学 | Method for reclaiming heavy metal-polluted soil |
| CN102678124B (en) * | 2012-05-29 | 2014-05-21 | 武汉科技大学 | Method for back-filling surface subsidence area based on underground metal mineral deposit mining |
| CN102918950B (en) * | 2012-10-26 | 2015-04-01 | 中国矿业大学(北京) | Method for determining reclamation construction sensitive area in coal mining subsidence land |
| CN103867229B (en) * | 2014-03-12 | 2016-05-11 | 河北煤炭科学研究院 | A kind of coal mine large-mining is dark prevents and treats comprehensive treatment method for water with lower group of coal mining |
| CN104686003A (en) * | 2014-12-30 | 2015-06-10 | 中国矿业大学 | Reconstruction method of reclaimed soil profile in coal mining subsidence area |
| CN106285683B (en) * | 2016-08-18 | 2018-12-04 | 沈阳农业大学 | Openpit or Subsidence Area bottom store water pumping method in mine reclamation |
| CN106285571B (en) * | 2016-09-29 | 2018-11-30 | 江苏省水利科学研究院 | A kind of pre- mining system of water resources in coal mines subregion and method |
| CN107506953A (en) * | 2017-10-12 | 2017-12-22 | 北京蓝尊科技有限公司 | A kind of Collapse by Mining ground environment remediation decision-making assistant information acquisition methods |
| CN108243647B (en) * | 2018-01-08 | 2019-09-10 | 西安科技大学 | A kind of new method that coal field dynamic in Midwest is reclaimed in advance |
| CN110431951A (en) * | 2019-08-14 | 2019-11-12 | 煤炭科学研究总院 | A kind of opencut saves the land reclamation method of water resource |
| CN112806124A (en) * | 2021-01-05 | 2021-05-18 | 神华神东煤炭集团有限责任公司 | Construction method for constructing vegetation pit in coal mining subsidence area |
| CN113432322B (en) * | 2021-07-02 | 2022-07-19 | 山东科技大学 | Comprehensive utilization method and test equipment for surface water, goaf and geothermal heat of coal mining subsidence area |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1130712A (en) * | 1995-12-26 | 1996-09-11 | 张朝喜 | Drainage cut-off (deep ditch high-building method) drainage and supplying optimization combination for preventing and harnessing groud water |
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