1Study on the effect of different extraction conditions on"three zones"of coal spontaneous combustion in goafWEN Hu, WANG Wen, CHENG Xiaojiao, JIA Yongfeng, CHENG Bangkai, CHENG Ming, HU WeiTest Research1-72Experimental research on the proportion and mechanical properties of outburst briquetteDAI LinchaoTest Research8-123Research on key technology of coal roadway support in advance abutment pressure zoneYANG Yawei, ZHAI YingdaTest Research13-184Study on stability control of surrounding rock of roadway affected by driving disturbanceZHANG Bin, SU Xuegui, DUAN Zhenxiong, CHANG Lizong, WANG FuzhouTest Research19-24,315Study on spontaneous combustion oxidation of carbonized powderXIAO Yang, PANG Pan, HUANG Chuanliang, LU Xiaodong, YIN LanTest Research25-316Study on properties of composite filling material of fluorogypsum modified high water fly ashBAI Longjian, YAN Guochao, YANG TaoTest Research32-367Study on borehole arrangement mode for eliminating the blank zone in blind area of drilling gas extractionLI Pu, ZHANG Xiaodong, QIN MuguangTest Research37-428Numerical study on the influence of strip defect angle on the mechanical properties of sandstoneLYU Xuegang, REN Mengzi, YANG Weihong, WANG FengTest Research43-47,539Analysis of the influence of coal thickness on the physical and mechanical characteristics of coal and rock massLI Huigui, WEI Le, LI HuaminTest Research48-5310Study on rheological properties of Mg(OH)2 modified fire prevention pasteZHANG Xinhai, HU Zhen, XUE Hanling, ZHANG Guowei, LI Jingwen, SHANG ZhizhouTest Research54-5811Experimental study on the strength of remolded loess on filled sites under different compaction energiesFAN Yuhao, QIAN Sizhong, LI JinhuaTest Research59-6212Research and application on prevention and control system of hydrogen sulfide disaster of coal mining in the overlapping area of coal and oil resourcesMA Xinghua, HUANG Guangli, WANG ZhenApplication Techniques63-6813Research and application of gas stereoscopic drainage technology in horizontal slicing working face of steeply and ultra-thick coal seamZHENG Sanlong, FAN Jiuyuan, WANG Gang, WANG EnmaoApplication Techniques69-7414Study on the identification of spontaneous combustion hazard area in goaf based on optical fiber temperature measurement technologyCAO Wenhui, WANG FeiApplication Techniques75-79,8415Design of precise 3 D positioning system for mine roadway based on UWBSHEN Guojie, ZHOU Desheng, ZHENG Xuena, LI MinApplication Techniques80-8416Study on dynamic early warning method of high and steep slope in Qidashan Surface MineSUN Mingchen, SUN Houguang, ZHONG Xiaoyu, CAO Wang, CHEN XiaoqingTechnical Experience85-88,9317Study on deformation and failure mechanism of rock mass in deep coal seam floor based on damage degradation of available bearing capacityZHANG Fengda, ZHANG YujunTechnical Experience89-9318Study on critical value of K1 of outburst risk prediction index of working faceZHANG YuzhuTechnical Experience94-9719Study on the characteristics of lateral mining stress field in full mechanized working face with large mining height in deep mineLI ZhengjieTechnical Experience98-101,11220Progress in research on drilling repair and protect technology for gas drainage in coal mineSHEN Kai, LIU Yanbao, BA Quanbin, ZHANG Lei, XIONG WeiIssue Discussion102-106 