Study on stability evaluation and geological disaster risk assessment of coal mine goaf subsidence areas
To further explore more detailed characteristics of coal mine goaf subsidence area,thus laying the foundation for the govern-ance work,taking the goaf subsidence area of Zhangshuanglou large coal mine as the research object,the factor index system of mine ge-ological environment based on hierarchical analysis was constructed.The results show that the two factors that have the greatest impact on surface subsidence in the subsidence area are mining thickness and roof lithology,the factors that have a relatively small impact are the mining of coal seams and the final mining time.High-risk areas are mainly distributed in the mining areas with frequent coal mining activities,while medium risk areas are located on the periphery of high-risk areas.Medium risk areas may also occur in areas with unsta-ble geological structures.Based on the evaluation results,the engineering model of"digging deep and covering shallow"was proposed,and various measures were comprehensively applied to achieve better land reclamation effects in mining areas.
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