CN111279832A - Filling reclamation method for coal mining subsidence land - Google Patents
Filling reclamation method for coal mining subsidence land Download PDFInfo
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- CN111279832A CN111279832A CN202010057618.7A CN202010057618A CN111279832A CN 111279832 A CN111279832 A CN 111279832A CN 202010057618 A CN202010057618 A CN 202010057618A CN 111279832 A CN111279832 A CN 111279832A
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- 239000003245 coal Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000005065 mining Methods 0.000 title claims abstract description 33
- 239000002689 soil Substances 0.000 claims abstract description 102
- 239000010410 layer Substances 0.000 claims abstract description 79
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 239000002344 surface layer Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000005070 sampling Methods 0.000 claims description 12
- 239000004576 sand Substances 0.000 claims description 5
- 239000003337 fertilizer Substances 0.000 claims description 4
- 239000003864 humus Substances 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 238000012163 sequencing technique Methods 0.000 claims description 4
- 238000001931 thermography Methods 0.000 claims description 4
- 230000002708 enhancing effect Effects 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims description 2
- 238000010169 landfilling Methods 0.000 claims 5
- 230000000903 blocking effect Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000002154 agricultural waste Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Remote Sensing (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a filling reclamation method for a coal mining subsidence land, which comprises the following steps: carrying out preliminary detection and preliminary planning on initial basic information such as a settlement value, a settlement area, a geological environment, an underground water area and the like of a preliminary filling position; dividing the pre-filling area according to the soil layer structure, and performing a grouped filling and reclamation plan on each two adjacent areas; digging out the surface layer cultivated soil of the A land block with deeper collapse and piling the surface layer cultivated soil of the B land block with shallower collapse, then continuing digging out the core soil layer of the A land block, piling the soil of the core soil layer on the mining channel, and digging out the bottom soil layer soil with partial thickness for standby. According to the invention, the surface soil layer and the core soil layer are sequentially dug and stacked, so that the geological structure of the subsided area and the original soil layer is not disturbed, the original state is closer to the original state, and the reclamation is facilitated; the bottom soil layer is tamped, so that the bearing capacity of the bottom soil layer is increased; the tamped bottom soil layer is covered on the coal gangue layer, so that the pollution of the coal gangue can be prevented from being upwards diffused to influence cultivation.
Description
Technical Field
The invention relates to the technical field of filling reclamation, in particular to a method for filling reclamation of coal mining subsidence lands.
Background
The underground coal mining in China is a main mining method, which accounts for more than 95 percent of the total output, however, coal mining is one of the main reasons causing land damage, according to incomplete statistics, 1500 various mining areas in China currently occupy and damage up to 200 million hectares, wherein the area of coal mining subsided land reaches 100 million hectares, the land area is increased by 3.3 to 4.7 million hectares every year, most of the land areas are high-quality grain fields and are concentrated in partial key mining areas, so that the human-ground contradiction and the industrial-mining contradiction in the areas are very sharp, meanwhile, a large amount of coal gangue can be accumulated in the process of mining for many years, the coal gangue can not only occupy a large amount of land, but also can generate spontaneous combustion and eluviation, so as to pollute the local atmosphere, soil, water quality and ecological environment, leading to serious social and environmental problems, and thus reclamation of coal mining subsidence lands has a particularly important meaning in China, so-called reclamation soil profile reconstruction, which is to construct a soil profile close to or more reasonable than natural soil by reasonable mining and reclamation processes to improve the productivity level of reclamation land, however, the key to improving the productivity level of reclamation soil and realizing continuous utilization of reclamation land is whether the reclamation soil reconstruction process can create a good environment for crop growth, the past large-scale reclamation method is mainly to utilize the reclamation method of shallow digging depth to reclaim as agricultural and solid waste filling as construction utilization, however, when reclamation of subsidence land is performed, the profile reconstruction problem of reclamation soil is rarely noticed, but is only carried out simply as a project, neglecting the problems of the nature, pollution and quality of the filling reclamation soil of the coal mining subsidence land and the similarity and consistency of reconstructed soil layers, a method for filling reclamation of the coal mining subsidence land needs to be designed to solve the problems.
Disclosure of Invention
The invention aims to provide a filling reclamation method for a coal mining subsidence land, which solves the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a filling reclamation method for coal mining subsidence lands comprises the following steps:
the method comprises the following steps: carrying out pre-detection and pre-planning on the original basic information of a pre-filling position, such as a subsidence value, a subsidence area, a geological structure, a geological environment, an underground water area and the like;
step two: carrying out three-dimensional multi-point sampling on the position to be pre-filled for reclamation, and carrying out sequencing numbering on the difficulty degree according to the analysis result of the sampling information;
step three: designing a corresponding reclamation scheme and process characteristics according to the reclamation object, range and area, the utilization direction of the reclamation land and reasonable ground elevation;
step four: dividing the pre-filling area according to the soil layer structure, and performing a grouped filling and reclamation plan on each two adjacent areas;
step five: grouping every two adjacent areas in the fourth step for soil layer stripping, digging out the surface layer cultivated soil of the A land block with deeper collapse and piling the surface layer cultivated soil of the B land block with shallower collapse, then continuously digging the core soil layer of the A land block, piling the soil of the core soil layer on a mining channel, digging out the soil of the bottom soil layer with partial thickness for standby, tamping the soil of the residual bottom soil layer by a tamping machine, enhancing the bearing capacity of the soil, then filling coal gangue at the upper end of the bottom soil layer according to the depth of collapse, filling fine sand grains into the coal gangue layer, covering the upper part of the coal gangue filling layer with the dug soil of the bottom soil layer, tamping again, and finally backfilling and reinforcing the core soil layer and the cultivated surface layer;
step six: and D, backfilling and reclaiming the B land with shallow collapse in the step five according to the filling method in the step five, and thus filling and reclaiming the coal mining collapse land can be completed.
Preferably, the pre-detection in the first step is performed by using methods such as thermal imaging, satellite acquisition, geological exploration and the like.
Preferably, the three-dimensional multipoint sampling analysis in the second step is to perform information acquisition on the density, thickness, fertilizer content, humus content, pH value, soil bearing capacity and the like of the soil and the coal gangue.
Preferably, the density detection is adopted in the step five when the soil is tamped again, and the density detection is larger than the density of the original soil layer and can be used as a pollution barrier layer.
Preferably, the thickness of the bottom soil layer dug in the fifth step is 50-60 cm.
The filling reclamation method for the coal mining subsidence land provided by the invention has the beneficial effects that:
1. according to the invention, the surface soil layer and the core soil layer are sequentially dug and stacked, so that the geological structure of the subsided area and the original soil layer is not disturbed, the original state is closer to the original state, and the reclamation is facilitated;
2. according to the invention, the coal gangue is used as a filler during filling, and fine sand is added into the coal gangue layer to be used as the filler for sealing gaps of the coal gangue, so that the stability of the coal gangue layer is ensured, and meanwhile, the bottom soil layer is tamped, so that the bearing capacity of the bottom soil layer is increased, and the stability of a geological layer which is filled and reclaimed is ensured;
3. according to the invention, the tamped bottom soil layer is covered on the coal gangue layer, so that the pollution of the coal gangue can be prevented from being upwards diffused to influence cultivation.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme of a filling reclamation method for a coal mining subsidence land, which comprises the following steps: the method comprises the following steps:
the method comprises the following steps: carrying out pre-detection and pre-planning on the original basic information of the pre-filling position, such as a subsidence value, a subsidence area, a geological structure, a geological environment, an underground water area and the like, wherein the pre-detection is carried out by adopting methods such as thermal imaging, satellite acquisition, geological exploration and the like;
step two: carrying out three-dimensional multi-point sampling on the position to be pre-filled for reclamation, and carrying out sequencing numbering of difficulty degree according to the analysis result of sampling information, wherein the three-dimensional multi-point sampling analysis is to carry out information acquisition on density, thickness, fertilizer content, humus content, pH value, soil bearing capacity and the like on soil and coal gangue;
step three: designing a corresponding reclamation scheme and process characteristics according to the reclamation object, range and area, the utilization direction of the reclamation land and reasonable ground elevation;
step four: dividing the pre-filling area according to the soil layer structure, and performing a grouped filling and reclamation plan on each two adjacent areas;
step five: grouping every two adjacent areas in the fourth step for soil layer stripping, digging out surface layer cultivated soil of a land A with deeper collapse to be stacked on a surface layer of a land B with shallower collapse, then continuously digging a core soil layer of the land A, stacking soil of the core soil layer on a mining channel, digging out bottom soil layer with the thickness of 60cm for standby, tamping soil of the residual bottom soil layer by using a tamping machine, enhancing the bearing capacity of the soil, then filling coal gangue at the upper end of the bottom soil layer according to the depth of collapse, filling fine sand particles into the coal gangue layer, covering the dug-out bottom soil layer on the upper part of the coal gangue filling layer, tamping again, adopting density detection in real time, wherein the density detection is greater than that of the original soil layer, and can be used as a pollution blocking layer, and finally backfilling and reinforcing the core soil layer and the cultivated surface layer;
step six: and D, backfilling and reclaiming the B land with shallow collapse in the step five according to the filling method in the step five, and thus filling and reclaiming the coal mining collapse land can be completed.
The following mainly introduces the working principle and process, and the specific work is as follows:
firstly, performing preliminary detection and preliminary planning on the original basic information of a preliminary filling position, such as a sinking value, a sinking area, a geological structure, a geological environment, an underground water area and the like, wherein the preliminary detection is performed by adopting methods such as thermal imaging, satellite acquisition, geological exploration and the like; carrying out three-dimensional multi-point sampling on a to-be-prefilled reclamation position, wherein the three-dimensional multi-point sampling analysis is to carry out information acquisition on the density, the thickness, the fertilizer content, the humus content, the pH value, the soil bearing capacity and the like of soil and coal gangue, and carrying out sequencing numbering of difficulty degrees according to the analysis result of sampling information; designing a corresponding reclamation scheme and process characteristics according to the reclamation object, range and area, the utilization direction of the reclamation land and reasonable ground elevation; then dividing the pre-filling areas according to the soil layer structure, and performing grouping filling reclamation plan on every two adjacent areas; then every two adjacent areas in the fourth step are grouped for soil layer stripping, the surface layer cultivated soil of the land A with deeper collapse is dug out and stacked on the surface layer of the land B with shallower collapse, then, the subsoil layer of the land parcel A is continuously excavated, the soil of the subsoil layer is stacked on the exploitation channel, the subsoil layer soil with half thickness is excavated for standby, the thickness of the subsoil layer is 50-60cm, the soil of the rest subsoil layer is tamped by a tamping machine to strengthen the bearing capacity of the soil, then filling the coal gangue at the upper end of the bottom soil layer according to the collapse depth, filling fine sand grains into the coal gangue layer, covering excavated bottom soil layer soil on the coal gangue filling layer, tamping again, adopting density detection in real time of tamping again, wherein the density detection is larger than that of the original soil layer and can be used as a pollution blocking layer, and finally backfilling and reinforcing the core soil layer and the cultivation surface layer; and finally, backfilling and reclaiming the B land with shallow collapse in the fifth step according to the filling method in the fifth step, so that filling and reclaiming of the coal mining collapse land can be completed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A coal mining subsidence land filling reclamation method is characterized in that: the method comprises the following steps:
the method comprises the following steps: carrying out pre-detection and pre-planning on the original basic information of a pre-filling position, such as a subsidence value, a subsidence area, a geological structure, a geological environment, an underground water area and the like;
step two: carrying out three-dimensional multi-point sampling on the position to be pre-filled for reclamation, and carrying out sequencing numbering on the difficulty degree according to the analysis result of the sampling information;
step three: designing a corresponding reclamation scheme and process characteristics according to the reclamation object, range and area, the utilization direction of the reclamation land and reasonable ground elevation;
step four: dividing the pre-filling area according to the soil layer structure, and performing a grouped filling and reclamation plan on each two adjacent areas;
step five: grouping every two adjacent areas in the fourth step for soil layer stripping, digging out the surface layer cultivated soil of the A land block with deeper collapse and piling the surface layer cultivated soil of the B land block with shallower collapse, then continuing digging the core soil layer of the A land block, piling the soil of the core soil layer on the mining channel, digging out the soil of the bottom soil layer with partial thickness for standby, tamping the soil of the residual bottom soil layer by a tamping machine, enhancing the bearing capacity of the soil, then filling coal gangue at the upper end of the bottom soil layer according to the depth of collapse, filling fine sand grains into the coal gangue layer, covering the upper part of the coal gangue filling layer with the dug-out soil of the bottom soil layer, tamping again, and finally backfilling and reinforcing the core soil layer and the cultivated surface layer;
step six: and D, backfilling and reclaiming the B land with shallow collapse in the step five according to the filling method in the step five, and thus filling and reclaiming the coal mining collapse land can be completed.
2. The coal mining subsidence land filling reclamation method of claim 1, wherein: the pre-detection in the first step is carried out by adopting methods such as thermal imaging, satellite acquisition, geological exploration and the like.
3. The coal mining subsidence land filling reclamation method of claim 1, wherein: and the three-dimensional multipoint sampling analysis in the second step is to acquire information such as density, thickness, fertilizer content, humus content, pH value, soil bearing capacity and the like of soil and coal gangue.
4. The coal mining subsidence land filling reclamation method of claim 1, wherein: and in the fifth step, density detection is adopted in the process of tamping again, the density is greater than that of the original soil layer, and the soil layer can be used as a pollution barrier layer.
5. The coal mining subsidence land filling reclamation method of claim 1, wherein: and digging a bottom soil layer in the fifth step to form the soil layer with the thickness of 50-60 cm.
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| CN202010057618.7A CN111279832A (en) | 2020-01-19 | 2020-01-19 | Filling reclamation method for coal mining subsidence land |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112946776A (en) * | 2021-02-03 | 2021-06-11 | 薛良方 | Interhole geophysical prospecting test device with variable spacing |
| CN113841478A (en) * | 2021-11-03 | 2021-12-28 | 安徽理工大学 | Method for coal mining subsidence area soil reconstruction by using coal-based solid waste |
| CN114145158A (en) * | 2021-11-30 | 2022-03-08 | 青海九零六工程勘察设计院有限责任公司 | Land reclamation structure of coal mine carbon residue land in high and cold regions and implementation method |
| CN116097938A (en) * | 2023-02-01 | 2023-05-12 | 鄂尔多斯市环保投资有限公司 | Method for reclamation and field making of coal mine subsidence area and gully area filled with coal gangue |
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| CN113841478A (en) * | 2021-11-03 | 2021-12-28 | 安徽理工大学 | Method for coal mining subsidence area soil reconstruction by using coal-based solid waste |
| CN113841478B (en) * | 2021-11-03 | 2023-09-08 | 安徽理工大学 | Method for reconstructing soil in coal mining subsidence area by using coal-based solid waste |
| CN114145158A (en) * | 2021-11-30 | 2022-03-08 | 青海九零六工程勘察设计院有限责任公司 | Land reclamation structure of coal mine carbon residue land in high and cold regions and implementation method |
| CN116097938A (en) * | 2023-02-01 | 2023-05-12 | 鄂尔多斯市环保投资有限公司 | Method for reclamation and field making of coal mine subsidence area and gully area filled with coal gangue |
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