东滩煤矿采区构造复杂程度及突水危险性分区对比探究

Comparative Study on the Structural Complexity and Water Inrush Risk Zones in Mining Areas of Dongtan Coal Mine

为了探究东滩煤矿五七采区开采山西组3煤层底板突水危险性,根据研究区地质、水文地质、断层和钻孔等资料,较系统分析了研究区断裂分布特征。在此基础上,采用分形分维方法和突水系数法对五七采区的断裂构造复杂程度及突水危险性分别进行了分区研究。结果发现,虽2种方法的计算原理和量化分区参数不同,但评价结果具有较好的匹配性。获得了五七采区煤层底板在东北部区域分维值高,地质构造复杂,突水系数值大,应属于突水危险区,东南部区域属于突水相对危险区,西部区域基本属于安全区。研究结果对五七采区安全带压掘采和水害防治具有重要的参考价值。

In order to research the risk of water inrush from coal floor of Shanxi formation No.3 coal seam in No.5 and 7 mining areas in,according to the data of geology,hydrogeology,fault and borehole of the research area,the fault distribution characteristics of the research area are systematically analyzed.On this basis,fractal method and water inrush coefficient method are used to study the fault structure complexity and water inrush risk in No.5 and 7 mining areas.The results show that the evaluation results have a good match between the fractal method and water inrush coefficient method although the calculation principle and quantization parameters of the two methods are different.It is concluded that the coal seam floor in the No.5 and 7 mining area has a high fractal dimension in the northeast,complicated geological structure,and large water inrush coefficient,which should belong to the danger zone of water inrush,the southeast area belongs to the relative danger zone of water inrush,and the west area belongs to the safety zone.The results of this study have important reference value for the safety belt pressure excavation and water hazard prevention and control in No.5 and 7 mining areas.