Abstract:

Based on the actual situation of Jialequan coal mine 9101 working face as the background, using numerical simulation experiment and theoretic calculation to research the the working face roof control of coal mined-out area under .By analysising the different initial supporting force is in the same position and the same initial support force at different locations and different distance analysis, ultimately find out the reasonable working resistance of support for the 4694KN/ frame.

Key words: in close distance coal seam, under goaf, fully-mechanized faces, working resistance of support