崇信县百贯沟煤矿矿山地质特征及生态修复研究

Research on mine geological characteristics and ecological restoration of Baiguangou Coal Mine in Chongxin County

百贯沟煤矿大地构造位于阿拉善—华北板块的次级单元鄂尔多斯盆地的西南缘,含煤地层主要为侏罗系中统延安组,厚度62.14~189.30 m,矿山生产能力为60×10^(4)t/a,服务年限50.4年。通过对矿区野外实地调查,矿区水文地质条件简单;现状条件下矿山地质环境问题的类型少,危害小;采空区面积小,采动影响较轻;地质环境条件复杂程度为中等,矿山地质环境影响评估分级属一级评估。预测评估,矿区地面塌陷、不稳定斜坡、泥石流对矿山地质环境的影响程度较严重;综合分析预测矿山地质环境发展趋势,充分考虑矿山地质环境问题对地质环境的影响,将矿区划分为重点防治区、次重点防治区和一般防治区,确定地质灾害及影响或破坏的土地资源作为治理防治对象,并提出了具体的、有针对性的防治工程措施。

The geotectonic structure of Baiguangou Coal Mine is located in the southwestern margin of the Ordos Basin,a sub-unit of the Alxa-North China Plate.The coal-bearing strata are mainly the Yan′an Formation of the Middle Jurassic,with a thickness of 62.14~189.30 m and a mine production capacity of 60×10^(4) t/a,the service life is 50.4 years.Through field investigation of the mining area,the hydrogeological conditions of the mining area were simple;under the current conditions,the types of mine geological environmental problems were few and the harm was small;the goaf area was small,and the mining impact was relatively light;the geological environmental conditions were moderately complex,and the mine geological environment the impact assessment rating was a first-level assessment.Prediction and evaluation,the impact of ground subsidence,unstable slopes and debris flows on the mine geological environment was relatively serious;comprehensively analyzed and predicted the development trend of the mine geological environment,fully considered the impact of the mine geological environment problems on the geological environment,and divided the mining area into key prevention and control areas,secondary key prevention and control areas and general prevention and control areas,determined geological disasters and land resources affected or destroyed as control and prevention objects,and put forward specific and targeted prevention and control engineering measures.