1Research on automatic conveying system of large-capacity drill pipebased on path planningWANG Qingfeng, CHEN HangSpecial Column1-62Study on overlying strata stability characteristics of re-mining facecrossing roadway residual mining areaWANG Kun, TANG Haibo, LIU Dapeng, XU ZhongheTest Research7-113Study on stability control technology of water-rich soft rock roadwayYIN Qihao, LI Chunting, LI Tingchun, XUE Kelong, GAO QiqiangTest Research12-164Experimental study on rapid determination of coal hardiness coefficient bycrushing methodHU JieTest Research17-205Overload safety test and numerical simulation study on inclined lifting of tailing damLIANG Bing, ZHOU Kelin, JIN Jiaxu, SUN Bentong, WEI YongqingTest Research21-256Theoretical study on the drilling cuttings considering coal seamangle and borehole angleZHOU Yang, LIANG Bing, SHI Zhanshan, SUN Weiji, LIU XueTest Research26-30,357Experimental study on the influence of air supply on characteristics oflignite spontaneous combustionZHOU Xihua, NIU Yuping, BAI GangTest Research31-358Research on bedding drilling and permeability increasing technology based onthe condition of hard coal seamLU ZhanjinApplication Techniques36-39,449Study on deformation law of surrounding rock in gob-side entryretaining formed by roof fracturingTANG Jianquan, HUO Xuefeng, YANG Huafu, ZHU Zhongshuai, LIU HongliangApplication Techniques40-4410Study on gob-side entry retaining technology of in-situ filling in high gassyoutburst coal seamLIU Yutao, LI Qizhen, WANG PengweiApplication Techniques45-5011Application and effect analysis of middle and low pressure comprehensivecoal seam water injection in Jiulishan Coal MineMA Lehui, LI FengApplication Techniques51-54,6512Study on the height of overburden strata in two zones of"two soft and one hard"unstable coal seam working faceWANG Zhenguang, LI Feilong, BAI Zhiyong, ZHU ShuyunTechnical Experience55-6013Study on gas drainage technology of large diameter horizontal borehole bridging goafCHENG Bo, CHEN Dianfu, PENG Minghui, YANG LiangTechnical Experience61-6514Research on roller shaft temperature detection and thermal conductivitymodel based on optical fiber temperature measurementGUO QinghuaTechnical Experience66-69,7415Research on mining low speed remote monitoring communicationplatform based on SX1278ZHANG XinTechnical Experience70-7416Evolution law and coordinated control of overburden strata crossinggully terrain in fully mechanized working faceGUO JingTechnical Experience75-7917Study on repair technology of gas leakage failure borehole of gas extractionXIONG WeiTechnical Experience80-8318Judgment of roadway rock burst based on the model of yield contour lineSUN ZhongguangIssue Discussion84-8819Malfunction diagnoses of dust collector based on neural networkZHANG Li, LI Jiangsheng, LI Jianlong, CHEN YixiaoIssue Discussion89-94,9920Analysis of cutting model and influencing factors in the process ofrock formation drillingQIU Dongwei, ZHAO Zhigang, ZHANG Wei, ZHENG YahuaIssue Discussion95-99 