采空区覆岩冒裂带发育高度预测综述

为较全面了解煤层开采后的覆岩破坏机理及其预测方法,对岩体的力学运动特征,经验公式的应用,模拟方法的特点等方面进行了总结分析,认为煤矿所在区的构造环境对采煤沉陷机理和特征起到控制作用;经验公式在预测新型采煤方法条件下的采煤沉陷时,精确性较之条采或普采为差,与实际观测偏差也较大;数值模拟方法是物理模拟方法的重要补充,但需要对其结果的可靠性进行必要的判定。

Overview of overlying strata caving and rock fracture zone development height prediction of goaf

In order to comprehensively understanding the mechanic of overburden rock failure and the prediction of its height after the coal-seam being mined, the mechanical feature, application of empirical formula, and characteristics of simulation methods were summarized and analyzed, the results show that, tectonic setting would control the mining subsidence mechanic and feature to some extent, the empirical formulas prediction accuracy would be better when they were used in strip extraction or common mechanized extraction than other mining methods, the numerical simulation was an important supplement for the physical simulation method, but its results must be judged properly before used.