1Discussing about the main theoretical problems of long wall with top coal cavingYAN Shao-hong, YIN Xi-wen481-4842A primary exploration on the relationships among loading key strata,water-resisting key strata and seepage key strataKONG Hai-ling, CHEN Zhan-qing, BU Wan-kui, WANG Bo, WANG Lu-zhen485-4883Feasibility study of long wall with top coal caving in Baode coalmine in Shendong mining areaZHANG Ri-chen489-4914Forecast of surface deformation of slope of strip mine based on support vector machineLI Feng-ming, LI Hong-yan, SUN Wei-ji492-4955Fluidity test on sand blended with clayXU Yan-chun496-4996Coal-controlled structural styles and coal occurrence regularity in northern Qaidam BasinZHAN Wen-feng, CAO Dai-yong, LIU Tian-ji, WANG Xin-guo, LIN Zhong-yue, LIN Liang500-5047Stress's influence in different tectonic positions on fracturing interstitial morphologyNI Xiao-ming, WANG Yan-bin, JIE Ming-xun, LIU Guo-feng505-5088Experimental research on sensibility of permeability of coal samples under confining pressure status based on scale effectPENG Yong-wei, QI Qing-xin, DENG Zhi-gang, LI Hong-yan509-5139Comparison of interpolations for coal nature of coalfield based on geological statisticsHE Ya-qun, ZUO Wei-ran, ZHANG Shu-min, LAO Guo-hong, DUAN Chen-long514-51710Experiment on thermodynamic parameters of soils under secondary freeze-thaw actionLIU Rui-feng, HU Xiang-dong, PI Ai-ru518-52111Study on spatial modeling of orebody information based on SVA integralLIU Ya-jing, MAO Shan-jun, YAO Ji-ming522-52612Formal description of topological relations for geo-entity based on simplicial decomposition of GTP modelDENG Nian-dong, HOU En-ke527-53113Developmental design and application of decision support system for land reclamation in mining areaZHANG Ji-dong, BAI Zhong-ke, CUI Yan, XU Shi-guang, ZHENG Xin-qi532-53614Composing characteristic and evolution law of carbon and oxygen stable isotopes in groundwater dissolved carbonateCHEN Lu-wang, GUI He-rong, YIN Xiao-xi537-54215Capacity prediction and optimization project on fractured well in medium-high permeability reservoirHUANG Guang-tao, ZHANG Shi-cheng543-54616Complexity and measurement of complex degree of gas gush in heading faces of coal mineHE Li-wen, SHI Shi-liang, SONG Yi, LIU Ying547-55017Dynamic prediction technology for gas based on data fusion theorySHAO Liangshan, FU Gui-xiang551-55518Physical adsorption mechanism of coal surface containing sulfur group adsorption to more oxygen moleculeDENG Cun-bao, WANG Xue-feng, WANG Ji-ren, DENG Han-zhong, YE Bing556-56019Study on the early warning of coal resources safety in Hebei ProvinceHOU Yunbing, ZHANG Wen, YANG Xin-hua, Liu Chun-de, CAO Dai-yong, ZHANG Jun, ZHANG Lu-suo561-56520Dynamic calcinations to Jingxi kaolin in coal measuresYANG Xiao-jie, HU Shao-xiang, CHEN Xiang-xiang, ZHUO Peng, XIANG Fang-bei566-569 