1Research on the Device of Carbon Dioxide Purification in Coal Mine Refuge ChamberLI Jing, JIN Long-zhe, WANG Sheng1-42A Simulation Experiment towards Influences of Temperature on Karst Collapse Column in Wutongzhuang Coal MineYANG Miao, CHEN Suo-zhong, HUANG Xin-lei, LIU Pu, SUN Ya-jun5-7,103Study on Gas Optical Fiber Sensing SystemZHANG Hai-qing, ZHOU Meng-ran, WU Hong-wei8-104Experimental Study on Cut Blasting with Slotted CartridgeYANG Ren-shu, TONG Qiang, YANG Guo-liang11-14