强排煤粉防治冲击地压的机制与应用

 确定合理的技术参数是应用强排煤粉防治冲击地压的关键。采用室内实验、数值模拟等方法研究强排煤粉防治冲击地压的机制，建立钻孔间距、钻孔直径等强排煤粉技术参数的确定方法，提出冲击地压分区治理思路，并得到以下结论：(1) 强排煤粉的主要作用是“降模增变”和“耗能增阻”；(2) 防冲钻孔间距是钻孔直径、煤层厚度、增溢系数和安全增变量的函数，并与增溢系数、钻孔直径呈正相关，与煤层厚度、安全增变量呈负相关；(3) 冲击地压治理分为预卸压和解危2个阶段，强排煤粉应用于预卸压阶段时的主要作用是“降模增变”，应用于解危阶段时的主要作用是“耗能增阻”。将研究成果应用于新巨龙矿井1302工作面冲击地压防治，取得良好效果，避免冲击地压事故的发生。研究结果对深井冲击地压防治具有参考意义。

MECHANISM OF INTENSIVE VENTING PULVERIZED COAL TO PREVENT COAL BURST AND ITS APPLICATION

The mechanism of intensive venting pulverized coal to prevent coal burst was studied through laboratory tests and numerical simulation. The methods of determining the parameters such as the spacing and diameter of boreholes and controlling the coal burst were presented. It is found that the main functions of the spacing of boreholes for coal burst control is a function of borehole diameter，coal thickness，spill-over coefficient，is positive correlated with the spill-over coefficient or the borehole diameter，and is negative correlated with the coal seam thickness or the safe-raising deformability. The intensive venting pulverized coal applied at the stage of pre-depressurizing is to reduce the elastic modulus and raise the deformability and at the stage of relieving danger is to absorb the energy and increase the resistance. The ideas are applied to working front of number 1302 of Xinjulong Mine with a good result.