充填工作面上覆岩层碎胀特性实验研究

Experimental Reserch on Broken Expand Properties of Overlying Strata in Filling Mining

为分析充填工作面的覆岩碎胀特性,以西马煤矿1326工作面为研究对象,采取现场取样,实验室测试的方法进行深入研究。设计垮落岩层碎胀系数的实验方案,制成4组原始块度组成的试样,最终确定垮落岩层的碎胀系数为1.450。设计残余碎胀系数及断裂带膨胀系数的实验方案,选择自制的实验装备,最终确定残余碎胀系数为1.074,膨胀系数为1.022。实验结果对计算充填开采过程中的覆岩破坏高度具有理论参考价值。

In order to analysis project topic,broken expansion property of overburden rock in filling working face,field sampling and laboratory testing were used for further study.Taking 1326 working face of Xima coal mine as the research object.4 groups of samples composed of original block size were made,the experimental scheme of broken expansion coefficient of caving rock is designed.Finally,the broken expansion coefficient of caving rock is 1.450.The experimental scheme of residual expansion coefficient and broken expansion coefficient of the fault zone was designed.The self-made experimental equipment was selected to determine the residual expansion coefficient of 1.074 and the broken expansion coefficient of 1.022.The experimental results have theoretical reference value for calculating the overburden failure height in the process of filling mining.