Q-S曲线法在预计奥灰疏降水量方面的应用

Application of Q-S Curve Expecting Ordovician Limestone Dewatering Quantity

为了预计奥灰疏降水量,采用Q-S曲线法。利用放水试验数据绘制Q-S曲线,根据曲线的形状判断经验方程的类型,采用最小二乘法计算经验公式的系数,建立经验公式;计算突水系数降至0.06 MPa/m时放水孔需疏降深度,把疏降深度带入经验公式即可预计奥灰疏降水量。预计的疏降水量减去影响半径范围内已有奥灰疏水孔疏放水量后即为采区煤层安全开采还需疏降的水量。此方法回避了各种水文地质参数求参过程中的失真,计算简单易行。

In order to expect Ordovician limestone dewatering quantity, Q-S curve method was adopted. Q-S curve was mapped based on dewatering experiment, empirical equation type was settled based on the shape of the curve, the coefficient of empirical formula was calculated by least square method, empirical formula was set up, dewatering depth of drainage hole was calculated when water bursting coefficient reduced to 0.06 MPa/m, Ordovician limestone dewatering quantity was got based on dewatering depth in the formula. The expected dewatering quantity subtracts existed Ordovician limestone dewatering quantity influencing radius, which is the dewatering quantity of safe mining. The technology avoids the error in calculating hydrogeological parameter, with easy conduction.