煤矿采空塌陷区稳定性评价及地质灾害风险评估研究

Study on stability evaluation and geological disaster risk assessment of coal mine goaf subsidence areas

为进一步探究煤矿采空塌陷区的更多细节特征,从而为治理工作奠定基础,以张双楼大型煤矿采空塌陷区为研究对象,基于层次分析法构建矿山地质环境的因子指标体系,结果显示沉陷区的地表沉陷影响最大的2个因素为开采厚度和顶板岩性,影响相对较小的因素为开采煤层和终采时间,高危险区主要分布在采煤活动频繁的矿区,而中等危险区则位于高风险区域的外围,在地质构造不稳定的区域也可能出现中等危险区,根据评价结果,提出应用“挖深垫浅”的工程模式,并综合应用多种措施,对矿区土地做到更好复垦效果。

To further explore more detailed characteristics of coal mine goaf subsidence area,thus laying the foundation for the governance work,taking the goaf subsidence area of Zhangshuanglou large coal mine as the research object,the factor index system of mine geological 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 unstable 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.