论文部分内容阅读
以某煤矿F5逆断层实际地质资料为背景,采用FLAC3D软件,对逆断层上、下两盘工作面依次回采时断层带的应力演化规律及断层的活化规律进行研究,揭示了工作面采动中落差与逆断层活化之间的联系。研究可知,下盘煤层开采时,断层落差与断层带正应力及两盘滑移量的变化成正比,即随落差的增大而增大,断层也更容易活化;上盘煤层开采时,随着断层落差的增大,断层的两盘滑移量及其所受的正应力均减小,断层落差越小,其活化程度反而越高,突水危险性更大,因此两盘开采呈现不同的规律,在实际中需加以区分,并有针对性地做好防治措施。
Based on the actual geologic data of a F5 thrust fault in a coal mine, the stress evolution law of fault zone and the activation law of the fault zone during the successive mining of the two upper and lower fault faces are studied by using FLAC3D software. The relationship between drop and inverse fault activation. It can be seen from the study that the fault drop is proportional to the normal stress of the fault zone and the slip of two slides when the lower coal seam is mined, that is, it increases with the increase of the head drop and the fault is more easily activated. With the increase of fault drop, the two plates’ slip and the normal stress suffered by the fault decreased. The smaller the fault drop, the higher the activation degree but the greater the risk of water inrush. Therefore, In the actual need to be distinguished, and targeted prevention measures.