一种脆性底板断层裂隙破坏的分析方法

AN ANALYTICAL METHOD FOR FAULT FRACTURING IN THE BRITTLE FLOOR

在对承压水上采煤煤层底板应力场的分析当中，目前大多数用的是弹性理论或者是弹塑性理论．根据断裂力学关于Ｇｒｉｆｆｉｔｈ二型裂纹断裂的理论，对此类问题中脆性底板中存在（未穿透底板的）断层情况给出一种新的分析方法．其结果可为试图解决此类问题的有限元程序编制者或现场工程技术人员直接采用．

Nowadays,people commonly analyse the floor stress field with the elastic theory or elastoplastic theory in the situation of mining over the confined water.A new method was introduced to analyse this kind of problem for fault within the brittle floor,according to the Griffith Ⅱ crack formulation of fracture mechanics.The method can be used directly by the Finite Element program designers as well as the field technicians who are seeking the solution to this kind of problem.