正断层形成的力学分析及其对构造煤的控制

Mechanics Analysis of Normal Fault Formation and Control of Structure Coal

构造煤是煤矿瓦斯灾害防治和煤层气开发的重要研究内容之一,依据断层成因理论,对正断层的形成进行了动力学和运动学分析,从时间上和空间上论述了断层上盘和下盘的应力分布和构造煤的分布特点,研究表明,断层上盘为主动盘,下盘为被动盘,构造煤具有片状序列结构特点,而且主要形成在断层上盘一定宽度的范围内,构造煤的厚度和发育程度随着远离断层而减小。

The structure coal has the important influence to the mine gas disaster prevention and control and to the coal bed methane development. According to the fault cause theory, dynamics and kinematics analysis were conducted on the formation of the normal fault. From the time and space, the paper stated the fault up and down blocks stress distribution and the structure coal distribution features. The study showed that the fault up block would the active block and the fault down block would be the passive block. The structure coal would have the laminated alignment structure features and mainly formed in a certain wide area of the fault up block. The thickness and development of the structure coal would be reduced with the distance to the fault increased.