华恒井田断层量化及对底板灰岩突水的影响

Influence of Fault Quantitative on Water Inrush at Floor Limestone in Huaheng Coal Mine

华恒矿采深较大,受底板灰岩突水威胁严重,针对断层控制突水的问题,利用分形理论及断层影响因子对煤层底板构造进行定量化研究;依据新汶矿区底板灰岩突水案例,利用散点图法和灰色关联分析法,对断裂构造与突水的相关性进行了分析,研究表明,断裂复杂程度与断层型底板灰岩突水危险性呈非线性正相关,断层影响因子是突水主控因素,断层分维值是次要因素;在此基础上,提出了断层型底板灰岩突水的断层控制指数,来判断井田内断层复杂程度、底板受构造破坏程度及突水危险性;通过分析计算,得出华恒矿断层控制指数临界值为0.70,并依此划分了突水危险区和安全区。

With the increase of mining depth,Huaheng Coal Mine is severely threatened by water inrush at floor limestone. Aimed at faults which are in charge of water inrush,the fault influencing factor and fractal dimension theory are introduced to quantitatively study the structure characteristics of coal seam floor. According to water inrush cases in Xinwen Coal Mine,scatter diagram method and grey correlation analysis are adapted to analyze the correlation between faults and water inrush. As a consequence,there is a nonlinear positive correlation between fault complexity degree and water inrush danger degree and fault influencing factor is the main controlling factor while fault fractal dimension value is secondary. With elements above,fault controlling index is proposed to estimate the complexity degree of fault,floor damage degree caused by structure and water inrush danger degree. By analyzing and calculating,0. 7,a critical value of fault controlling index in Huaheng Coal Mine is presented and used to divide Huaheng Coal Mine into safety zone and water inrush risk zone.