城郊煤矿二水平煤层底板突水危险性综合评价研究

Comprehensive risk assessment of water inrush from coal seam floor for No.2 mining level in Chengjiao Coal Mine

为了探究城郊煤矿深部延伸二水平主采二_(2)煤层底板突水危险性,根据矿区二水平底板地层及断层构造特征,采用突水系数法和分形分维方法对二水平底板的断层构造复杂程度及突水危险性分别进行了量化分区与综合分区评价。结果表明,虽然两种方法的计算过程和量化分区参数不同,但所进行的量化分区具有较好的一致性,断裂构造复杂程度分维值与突水系数值存在明显的正相关性,断裂构造复杂区域对应的突水系数值明显偏大,综合对比得到二水平煤层底板在东部和西部突水危险性均较大,中间区域偏安全。研究结果对城郊煤矿二水平二_(2)煤层安全带压开采具有重要的参考价值。

In order to explore the risk of water inrush from II_(2) coal seam floor in No.2 mining level in the deep extension of Cheng Jiao Coal Mine,according to the characteristics of the No.2 level floor strata and fault structure in the mining area,the water inrush coefficient method and the fractal dimension method are used for the quantitative zonation and comprehensive zonation assessment of the fault structure complexity and risk of water inrush.The results show that,despite the different calculation process and parameters,the quantitative partitioning results of the two methods are highly consistent;the fractal dimension of the fault structure has a significant positive correlation with the water inrush coefficient.The comprehensive comparison shows that,the water inrush risk for coal seams in the No.2 mining level is great in the east and west part,and the middle part is safer.The research results can offer references for the safe compensate mining of II_(2) coal seam in No.2 mining level of Chengjiao Coal Mine.