【摘要】 覆岩破坏高度和形态的研究对水体下安全采煤至关重要。提出了把σ₁>σ_t作为模拟研究导水裂隙带范围的判据,针对大平煤矿S2S9工作面工程地质资料及开采条件,应用有限元软件ADINA模拟研究了煤层工作面开采过程,分析了在采动和渗流共同作用下覆岩的破坏特征及导水裂隙带形态,并利用现场实例对其进行反演计算。数值模拟的导水裂隙带的高度为160 m,与实测数据相符,为覆岩导水裂隙带高度的确定提供了一种可行的方法。更多还原

【Abstract】 It is very important to study the height and shape of overburden failure for safety mining under water body. According to the engineering geological data and mine exploration of S2S9 working face in Daping Coal Mine,we propose the σ1> σtas a criterion of studying water- flowing fractured zone,using ADINA finite element software to simulate the coal mining process,analyze failure characteristics of overburden rock and water flowing fractured zone under the action of mining and seepage and carry on the inversion calculation with field example. The water flowing fractured zone height of numerical simulation is 160 m,which is consistent with the measured data and provides a feasible method to determine height of the water flowing fractured.更多还原