近距离煤层群条件下保护层优选数值分析

In order to get the resluts of different pressure relief effects while take different coalseams as protective layer under the condition of closed coalseams group,FLAC was used. We analyse the pressure relief effecets and the deformations of protected layers while take 2#, 8#, 7# and 9# coalseams as protective layer in Tunlan coalmine. From the results and taken other factors into consideration, we get that, the pressure relief effect and the deformations of protected layers could meet the requirement while choose 8# coalseam as protective layer. That provide the data support for engineering application.