Research on the Development of Mining Fractures and the Mechanism of Fracturing in Folded Structure Areas
In order to solve the problem of frequent coal seam pressure frame accidents in fold structure geology,this paper uses numerical simulation software to study the characteristics of mining overlying rock fracture and crack development in fold structure mining.It is found that the development of cracks in fold structure mining can be roughly divided into three regions,namely,crack aggregation area,crack development area,and crack initiation area.At the same time,an analysis was conducted on the development of cracks under different mining heights and working face lengths.It was found that the height of water conducting cracks is proportional to the mining height and working face length.The height of crack development in each stage,from high to low,is in the order of passing through the post syncline stage,passing through the anticline stage,passing through the syncline stage,opening the cutting eye to the pre slope climbing stage.Finally,specific measures to prevent pressure frame accidents were provided,providing a basis for efficient mining in the mine.
NETL
NSTL
万方数据
