Numerical Simulation and Experimental Analysis of Coal Pillar Free Mining in Tunnels
In response to the problems of low coal resource recovery rate and serious resource waste in a certain coal mine,the coal pillar free mining technology was used on the 4303 working face.FLAC3D software was used to establish numerical simulation of the pressure manifestation on the working face,and force analysis and on-site measurement were carried out.The results show that after using the coal pillar free mining technology to cut the roof and leave the roadway,the subsidence of the roof and floor is basically stable at around 70 mm,the development of the roadway is reduced,the resource recovery rate is increased,and the mining life of the mine is increased.
pillar free miningnumerical simulationtop cutting and pressure relief
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