1Research on the division method of the dangerous area of coal spontaneous combustion in goaf based on multi-parameterYUE Ningfang, JIN Yan, CHEN Guilin, SUN Mingfu, RAN XuechaoTest Research1-5,112Numerical simulation of seepage characteristics of fractures with different roughnessLI Zhihao, CHEN ShijiangTest Research6-113Research on the anisotropic characteristics of gas microscopic seepage in coal pores based on X-ray μCT scanningCHE YuhengTest Research12-174Simulation study on thermal energy regulation of coal bed methane thermal storage and oxidationZHANG TaoTest Research18-225Temperature field distribution and deep temperature fitting of spontaneous combustion gangue dump in Yinying Coal MineYANG Na, ZHANG Yongbo, NIU JinrongTest Research23-27,326Study on mycorrhizal mechanism and ecological effect of different compaction density soil in mine land reclamationZHU KunTest Research28-327Study on the rock burst failure mechanism and prevention technology of surrounding rock in dynamic pressurized roadway under high stressYANG Zengqiang, JIN Zhupeng, LIU Guodong, REN Changle, WANG ChenyanTest Research33-37,428Numerical simulation study of gas drainage based on directional long drillingWANG GuanghongTest Research38-429Study on inhibition performance of coal spontaneous combustion by sodium phosphateGU LiangTest Research43-47,5410Research on reasonable sealing depth and grouting parameters of bedding gas drainage drillingNIU Xingang, GUO LindongTest Research48-5411Floor heave mechanism and control technology of deep high stress water-rich clay soft rock roadwayWANG Wenli, SUN LiangmingTechnical Experience55-59,6712Research and application of comprehensive prevention and control technology of dust in working face with 8 m extra large mining heightLI Zhi, MA Wei, ZHANG Sheji, CHEN FangTechnical Experience60-6713Study on permeability resistance of Beigongcun No.2 large fault based on pumping testHOU Junhua, MENG Fanzhen, WANG Hong, FENG Lushun, MENG LingfeiTechnical Experience68-7414Analysis of mining subsidence law under the compound influence of various geological and mining factorsKANG Xinliang, CAI YinfeiTechnical Experience75-8015Application and practice of solid waste multi-state filling technology in ecological fragile area of western ChinaZHU LeiTechnical Experience81-8616Optimization design and numerical simulation of supporting scheme for deep mine roadwayGUO Ping, SHEN DafuTechnical Experience87-9117Research progress on analytical models of permeability for coal measure gas reservoirZHANG HongxueIssue Discussion92-9818Analysis of main controlling factors of effective radius of fracture in soft coal seamZHANG ZhaoyiIssue Discussion99-103,10819Technical status and intelligent development trend of coal mine safety monitoring systemLIU YuanyuanIssue Discussion104-10820Discussion on evaluation and implementation of pre-mining gas drainage standard in working face of gassy mineSUN BingxingIssue Discussion109-112,117 