Based on the similarity principle, the simulation experiment and analysis of the similar materials were carried out on the development characteristics of the mining-induced fissures in overburden strata, analysis was made on the height of the“three zones” in the overburden strata through the study on the subsidence amount at the test point of fissures in overburden strata, the density of fissures and the bed separation rate;the height of the caving zone was measured with a drilling detector and verification was made on the similar simulation experiment results. The height range of the “three zones” can be determined according to the theoretical analysis and the experiment results obtained by two methods, this thus provided the basis for the optimized design of high-level gas drainage roadway arrangement horizon and the design of high-position borehole parameters.% 基于相似原理，对覆岩采动裂隙发育特征进行相似材料模拟实验分析，通过研究采场覆岩裂隙的测点层位下沉量、裂隙密度及离层率，分析了覆岩“三带冶的高度；利用钻孔探测仪实测垮落带高度，对相似模拟实验结果进行验证。根据理论分析及这两种方法得出的结果可以确定“三带冶的高度范围，为优化设计高抽巷布置层位和高位钻孔设计参数提供依据。
展开▼
