1Numerical simulation of negative pressure cavity suppression of T-pipe gas explosionDING Hao, DU Yujing, XIE BeijingTest·Research1-82A comparative study on difference of pore characteristics of coal with different deformation degreesZHAO Zheng, NI Xiaoming, HAN Wenlong, LI ZhongchengTest·Research9-143Study on heterogeneous characteristics of methane adsorption by natural coalWANG Jiangfang, WANG Chen, FENG ZengchaoTest·Research15-204Pore characteristics and influencing factors of coal reservoir in Tucheng Mining Area of Guizhou ProvinceTANG Daixue, LIU Wen, LOU Yi, SHAO Linjie, GONG BinTest·Research21-26,325Effect of pre-crack on coal and rock mass induced by high voltage electric pulse in waterLI Chunming, ZHAO Yinxiang, ZHAO Jinchang, YANG Shuangsuo, MA ZhongzhongTest·Research27-326Research on law of magnetic anomaly variation with depth in fire area of Ordos CoalfieldZHANG Xinhai, CHENG Wangshou, LI Xunguang, MIAO Yuhui, DOU Kai, ZHU Hui, ZHAO Bin, CHEN Fei, YANG ShaoxiongTest·Research33-387Effect of axial loading rate on mechanical and permeability properties of raw coalWEI Wenhui, WEI Aidong, DUAN MinkeTest·Research39-468Experimental study on mechanical response failure mechanism of dynamic pressure roadway based on roof cutting and pressure releasing technologyYANG Zheng, DING Yanxiong, GAO XiaojunTest·Research47-539Study on creep failure of coal specimen subjected to step loadingDUAN HuiqiangTest·Research54-6010A new pressure maintaining and sealing technology for gas drainage boreholeWANG ShuaiApplication ? Innovation61-6611Three-dimensional electrical method advanced detection technology based on comparative method to eliminate the influence of roadwayZHAI Peihe, REN Keke, ZHANG Zhao, LIU YuxiangApplication ? Innovation67-71,7812Application of transient electromagnetic method in exploring karst aquifer in Qinglong Coal Mine of Qianbei Mining AreaFAN JuanApplication ? Innovation72-7813Research and application of pulverized coal ash ceramsite concrete isolation wallLI Zhiyong, XIN Min, LIU Xingle, TIAN XianghongApplication ? Innovation79-8314Grouting filling treatment method of goaf in small coal mine with soft rock roof and large buried depthQIAO YanzhenApplication ? Innovation84-8815Key technology of mine differential pressure and wind speed sensor used in harsh environmentLIU Peng, ZOU DedongDesign·Development89-9316Application status and development direction of wireless positioning technology and system in underground coal mineCHANG LinDesign·Development94-9817Accurate positioning system for mine based on UWB technologyWANG FeiDesign·Development99-10218Mine intrinsic safety power supply based on adjustable capacity and protection timeZOU Dedong, LIU PengDesign·Development103-106,11119Intelligent inspection robot system for return air roadway in Zhangjiamao Coal MineMAO Hao, XUE Zhongxin, FAN Shengjun, ZHAO HongjuDesign·Development107-11120Design and application of on-line monitoring system for borehole group in coal mineWANG Xiaolong, ZHAO Liang, ZHANG JunDesign·Development112-115 