为了预测煤矿深部带压开采奥灰突水危险性,合理划分危安区。研究了华北型煤田特征、模拟试验及相关资料,对以往突水系数公式进行了综合分析对比,在此基础上,提出突水系数修正公式,并对高家塔煤矿9号煤层带压开采奥灰突水危险性及危安区进行了预测、划分。结果表明:突水系数可由0.043~0.091 MPa/m修正为0.067~0.127 MPa/m,突水性分区可由相对安全区-相对危险区修正为相对危险区-危险区。实际生产矿井带压开采突水事故证明了突水系数修正公式的合理性。

In order to predict the water inrush danger from Ordovician limestone during the coal mining under the pressurized aquifer in deep mine and to rationally divide the dangerous zones, a study was conducted on the North China type coalfield features, simulation test and related information and the comprehensive analysis and comparison was conducted on the previous water inrush coefficient formulas.Based on the circumstances, a revised formula of the water inrush was provided and t he water inrush danger and risk zone of the Ordovician limestone during the pressurized mining in No.9 seam of Gaojiata Mine was predicted and divided.The results s howed that the water inrush coefficient could be revised from 0.0430.091 MPa/m to 0.0670.127 MPa/m and the water inrush subarea could be revised from the relative s afety area-the relative danger area to the relative danger area-danger area. The water inrush accident occurred from pressurized mining in the actual production mine V erified the rationality of the water inrush coefficient revised formula.