【作者】 高品红；

【导师】 成春奇；

【作者基本信息】 安徽理工大学 ， 地质工程， 2007， 硕士

【摘要】 新集矿区主要构造为推覆构造,受其影响将外来下元古界片麻岩地层、寒武系地层、下夹片地层(奥陶系、石炭系、二迭系)推覆于煤系地层之上,属推覆体下厚～特厚煤层群开采。由于推覆体地层的特殊性,造成其下伏煤层开采水文地质、工程地质条件复杂的状况。推覆体下煤层的开采目前在国内外尚无先例,关于推覆体地层水文地质参数及其对煤层开采影响的认识亦无可借鉴之经验。本次研究收集统计了矿区历年的钻探资料、抽(放)水试验质料及涌水观测资料,并对其采用现代地质统计学方法进行分析研究。根据钻孔岩芯编录资料的Kriging法插值结果绘制了推覆体各岩性地层的空间分布图,得到推覆体的岩性结构特征及空间分布特征;根据抽水试验资料,采用回归分析的方法得出推覆体水文地质参数(平均渗透系数k、导水系数T)与推覆体岩性结构及分布特征的相关关系及回归预测方程,在此基础上对全区推覆体水文地质参数的分布进行空间变异结构分析得出其随机分布的规律;根据涌水量动态分析,采用回归分析的方法得出矿井涌水量预测模型。结合研究区推覆体地层的富水性规律及涌水量预测模型,对煤层开采受推覆体的影响做出分析,提出了针对推覆体含水层的防水煤柱留设原则。更多还原

【Abstract】 The thrust construction in XinJi coalfield brought on lower Proterozic suberathem gneiss strata, Cambrian strata and lower horse strata covered on the coal-series strata. This special structure made the hydrogeological condition of coal mining become very complicated. There is no existent acquaintanceship about mining beneath the thrust at home and abroad.In this study, we collected drilling data, pumping tests data and the observation data of coalmine water rushing, and analyzed these data with new developed geostatistics. According to the thrust distribution contours which were made based on interplation of drill core catalogue data by Kriging method, we got the features of lithology structures and distribution rule of each stratum in the nappe. The values of average permeability and transmissivity coefficient were predicted with the forecast equation set up by correlation analysis and regression analysis of pumping tests data. The prediction model for coalmine water gushing was also built based on the regression analysis of the water gushing observation data.According to the spatial variability analysis of the thrust’s hydrogeological parameters, we judged the water abundance feature of the nappe and its effect on coal mining, and presented suggestions for waterproof pillar design.更多还原