1、 2023 1：，。，m；FLAC D，m，。：；：TD：A：（）Study on Coal Pillar Width Setting for Gob-side Entry Driving Based on Energy Dissipation Theory Jia Guozhong(Shanxi Shuozhou Pingluqu Lanhua Yongsheng Coal Industry Co.,Ltd.,Shuozhou,Shanxi 036803)Abstract:Taking the return air roadway of 2327 working face in Kailua
2、n Donghuantuo Colliery as the engineering background,the paper studies coal pillar width setting for gob-side entry driving based on energy dissipation theory and establishes an energy dissipation mechanical model to reveal the internal mechanism of coal and rock mass destruction based on the first
3、law of thermodynamics and the generalized Hookes law,that is,the basic reason for the failure of coal and rock mass is that the dissipated energy of rock mass element exceeds its critical value.Based on the limit equilibrium theory,the reasonable size of coal pillar is calculated to be 4.71 m,and th
4、e numerical simulation of energy dissipation of different coal pillar widths is carried out by using FLAC3Dsecondary development,and the 5 m coal pillar is determined to be the inflection point of energy dissipation peak and the reasonable coal pillar size,which can provide guidance for actual mine production.Key words:gob-side entry driving;coal pillar width;the first law of thermodynamics;Generalized Hookes law;energy dissipation theory（，），、，。，。，。，。，。、，、，；，、，m；，；，m，；，。
