Simulation analysis of water resource damage feature and development degree of mining-induced fracture at ecologically fragile mining area

Chi, Mingbo; Zhang, Dongsheng; Liu, Honglin; Wang, Hongzhi; Yazhou, Zhou; Zhang, Shuai; Yu, Wenxin; Liang, Shuaishuai; Qiang, Zhang

doi:10.1007/s12665-018-8039-5

Cited by 26 publications

(17 citation statements)

References 35 publications

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“…Field observations demonstrated that the coal pillars were stable and the roof was general intact. The decline of water level in the Salawusu Formation was less than 0.3 m, and the water table remains within 5 m below surface, demonstrating the effective protection of the local ecological water environment [7,[54][55][56].…”

Section: Narrow Strip Miningmentioning

confidence: 96%

Water Preservation and Conservation above Coal Mines Using an Innovative Approach: A Case Study

2020

Energies

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To better protect the ecological environment during large scale underground coal mining operations in the northwest of China, the authors have proposed a water-conservation coal mining (WCCM) method. This case study demonstrated the successful application of WCCM in the Yu-Shen mining area. Firstly, by using the analytic hierarchy process (AHP), the influencing factors of WCCM were identified and the identification model with a multilevel structure was developed, to determine the weight of each influencing factor. Based on this, the five maps: overburden thickness contour, stratigraphic structure map, water-rich zoning map of aquifers, aquiclude thickness contour and coal seam thickness contour, were analyzed and determined. This formed the basis for studying WCCM in the mining area. Using the geological conditions of the Yu-Shen mining area, the features of caved zone, water conductive fractured zone (WCFZ) and protective zone were studied. The equations for calculating the height of the “three zones” were proposed. Considering the hydrogeological condition of Yu-Shen mining area, the criteria were put forward to evaluate the impact of coal mining on groundwater, which were then used to determine the distribution of different impact levels. Using strata control theory, the mechanism and applicability of WCCM methods, including height-restricted mining, (partial) backfill mining and narrow strip mining, together with the applicable zone of these methods, were analyzed and identified. Under the guidance of “two zoning” (zoning based on coal mining’s impact level on groundwater and zoning based on applicability of WCCM methods), the WCCM practice was carried out in Yu-Shen mining area. The research findings will provide theoretical and practical instruction for the WCCM in the northwest mining area of China, which is important to reduce the impact of mining on surface and groundwater.

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Section: Narrow Strip Miningmentioning

confidence: 96%

Water Preservation and Conservation above Coal Mines Using an Innovative Approach: A Case Study

2020

Energies

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Section: Narrow Strip Miningmentioning

confidence: 99%

Green Coal Mining Techniques 2020

Spearing¹

2020

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“…In China, technical research regarding the mining and safety of shallow coal resources has preceded surface ecological protection, resulting in a large amount of water resource loss and ecological damage 11 , 12 . Therefore, deep coal mining in western mining regions require the protection of water resources and surface ecology, while ensuring safe and efficient mining operations 13 . Deformation and fracture of deep mining overburden and rock movement patterns are required from the perspective of mine production and safety,on the other hand, from the perspective of groundwater flow fields, it is necessary to master the characteristics of the groundwater flow field and evolution of mining water-filled aquifers.…”

Section: Introductionmentioning

confidence: 99%

Physical simulation study on grouting water plugging of flexible isolation layer in coal seam mining

et al. 2022

Sci Rep

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Deep coal seam mining often leads to water resource loss due to bedrock water entering the workings of the mine and is discharged adjacent to the mining area. Using the geological conditions of the Maiduoshan coal mine, this paper applied a physical simulation experiment. The specified rock above the coal seam was hydraulically fractured in advance to form a postmining grouted fracture network, followed by grouting to construct a flexible isolation layer that blocked the infiltration of groundwater from the aquifer into the water-conducting fracture zone. Stress sensors, flow sensors and strata displacement monitoring technology were deployed inside the experimental material to study the spatial distribution characteristics and evolution law of the water-conducting fracture zone in the overlying rocks. Analysis of the water-conducting fracture zone development law, stress variation, overburden evolution characteristics, fracturing and grouting sequence of the flexible isolation layer and the effect of postmining grouting on the water barrier was conducted. These experiments verified the feasibility of fracture and grouting of the flexible isolation layer. These research results will provide practical guidance for the transition from the current safe and efficient mining methods to safe and green mining methods of deep coal mining in the western mining areas of China.

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Simulation analysis of water resource damage feature and development degree of mining-induced fracture at ecologically fragile mining area

Cited by 26 publications

References 35 publications

Water Preservation and Conservation above Coal Mines Using an Innovative Approach: A Case Study

Water Preservation and Conservation above Coal Mines Using an Innovative Approach: A Case Study

Green Coal Mining Techniques 2020

Physical simulation study on grouting water plugging of flexible isolation layer in coal seam mining

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