Study on manifestation law of advanced support pressure in ultra long fully-mechanized caving face
In order to master the manifestation law of mine pressure in fully-mechanized caving face,numerical simulation method was a-dopted to establish a physical and mechanical model of fully-mechanized caving face for analysis.The results showed that the load on the working face support was mainly the deformation pressure produced by the deformation movement of the top coal and the basic roof.Therefore,increasing the initial support force and working resistance of the support had a positive effect on improving the structural state of the roof of the working face and maintaining the stability of the lower top coal.The supporting pressure in front of the working face was distributed approximately in a parabola,the peak was located at 4 m to 8 m in front of the coal wall,and the stress concentration co-efficient at the peak point was between 1.3 and 1.7.
fully-mechanized caving facenumerical simulation methodFLAC3Dadvanced support pressure
NETL
NSTL
万方数据
