School of Civil Engineering Henan Polytechnic University Jiaozuo 454000 China;
State Key Laboratory of Coal Resources and Safe Mining School of Mines China University of Mining and Technology Xuzhou 221116 ChinaSchool of Minerals and Energy Resources Engineering UNSW Sydney Sydney NSW 2052 Australia;
School of Civil Engineering Henan Polytechnic University Jiaozuo 454000 China;
School of Civil Engineering Henan Polytechnic University Jiaozuo 454000 China;
Water inrush and sand gushing accidents; Seepage flow of water-sand mixtures; Fractured specimens; Sand filtration capacity;