团柏煤矿临界突水系数的确定

Determination of Critical Water Bursting Coefficient of Tuanbai Coal Mine

突水系数是带压开采条件下衡量煤层底板突水危险程度的定量指标。通过分析常规突水系数计算中存在的优缺点,结合团柏煤矿实际的工况条件,推荐采用统计法P临—M关系曲线进行计算,并采用类比法求取5项修正因子对临界突水系数进行修正。经实践证明,该种方法是实用的、可靠的,计算成果有效地指导了煤层开采作业。

The water inrush coefficient is a quantitative indicator of the degree of danger of water inrush from the coal floor under pressure mining conditions. In this paper,by analyzing the advantages and disadvantages of the conventional water inrush coefficient calculation,combined with the actual working conditions of the Tuanbai coal mine,we recommend that curve of P limit-M relationship is suit to calculate water inrush coefficient. By using analogy method,5 correction factors are obtained to correct the critical water inrush coefficient. The practice has proved that this method is practical and reliable,and the calculation results effectively guide the coal seam mining operations.