标题：Experimental simulation of water-inrush disaster from the floor of mine and its mechanism investigation
作者：Zhang, Shichuan; Guo, Weijia; Li, Yangyag
作者机构：[Zhang, Shichuan; Guo, Weijia; Li, Yangyag] Shandong Univ Sci & Technol, State Key Lab Min Disaster Prevent & Control, Qingdao 266590, Shandong, Peopl 更多
通讯作者：Zhang, SC;Guo, WJ
通讯作者地址：[Zhang, SC; Guo, WJ]Shandong Univ Sci & Technol, State Key Lab Min Disaster Prevent & Control, Qingdao 266590, Shandong, Peoples R China.
来源：ARABIAN JOURNAL OF GEOSCIENCES
关键词：Coal mining; Similarity test; Complete floor; Confined water;; Visualization
摘要：Mine water inrush is very common in China and can cause hysteretic and severe damages to the safety production of coal mines. Essentially, water inrush from coal floor can be attributed to the connection of cracks and the formation of water channel in floor rocks under the interaction of stress field and seepage field. In this paper, the interaction between cracks, stress field, and seepage field in floor rocks was studied by physical simulation; the evolution law of water inrush from floor cracks was obtained under the fluid-solid coupling effect, and the monitoring of rock stress and seepage pressure was realized by virtue of soil pressure and pore-pressure sensors. The results indicated that the permeability of floor rocks had regional and temporal characteristics due to the cyclical variation of in-situ floor stress. The high-permeability zone occurred under the early mining stress area, and gradually extended and connected inside the floor. As a result, more confined water could flood into the connected cracks and thus changed the seepage field in front of working face. This work provides new approaches and knowledge for researching coal floor water inrush and has important significances for the prevention of coal water disasters.