马堡煤矿采动覆岩“三带”划分数值模拟研究

Numerical Simulation Study on the “Three Belts” Division of Overburden Mining in Mabao Coal Mine

为了得到马堡煤矿综采开采条件下采场裂隙带发育高度及演化特征,根据马堡煤矿的地质资料,通过RFPA模拟及现场验证,研究了煤层开采后覆岩在采动影响下纵横向裂隙的分布、发育及相互贯通规律,得到工作面开后覆岩破断与垮落规律,划分"三带"的分布区域:垮落带为48.31～50.67m,裂隙带为50.67～108.56m,现场实测结果与数值模拟结果基本一致;验证了RFPA模拟方法是采动覆岩"三带"高度研究的有效手段。

In order to obtain the development height and evolution characteristics of the fracture zone of the stope under the fully mechanized mining conditions of Mabao Coal Mine, according to the geological data of Mabao Coal Mine, through RFPA simulation and on-site verification, the overburden rock under the influence of mining is studied. According to the distribution, development and interpenetration of the fissures, the faults of the overburden strata after the working face are opened, and the distribution area of the 'three belts' is divided: the slump zone is 48.31-50.67 m, and the fissure zone is 50.67~108.56 m. The field test results are basically consistent with the numerical simulation results;it is verified that the RFPA simulation method is an effective means to study the height of the ' three belts' of overburden.