标题：Simulation Experimental Study on the Permeability of Coal Rock in Deep Mine
作者：Zhou Gang; Yu Yanbin; Cheng Weimin
作者机构：[Zhou Gang; Yu Yanbin; Cheng Weimin] Shandong Univ Sci & Technol, Coll Resource & Environm Engn, Qingdao 266590, Peoples R China.
会议名称：3rd International Conference on Applied Mechanics, Materials and Manufacturing (ICAMMM 2013)
会议日期：AUG 24-25, 2013
来源：APPLIED MATERIALS AND TECHNOLOGIES FOR MODERN MANUFACTURING, PTS 1-4
关键词：deep mine; coal rock; permeability properties; whole stress-strain;; volumetric strain
摘要：By means of MTS electro-hydraulic servo system, specimens from deep coal mine rock are conducted the permeability characteristics experiment under the condition of the stress-strain process and high pore-water pressure, also the results show that both the permeability rate and volumetric strain curves are V shaped, which link the dynamic changes of the microscopic fracture porosity and corresponds with the stress-strain. Meanwhile, under certain external conditions, whether the change of the pore-water pressure can improve the permeability properties or not, it depends on the critical threshold, moreover, the permeability properties under pore-water pressure higher than critical threshold have been improved several times than that at low pore-water pressure, and the peak of strain-permeability rate has a corresponding change with the peak of stress-strain curve, which shows a hysteretic characteristic. The higher the pore-water pressure is, the lower peak strength is needed, the more distinctive effects of dilatation emerge, and the more strain is needed for the appearance of permeability peak, This article provides the basis for the employment of high pore-water pressure to improve the permeability and disaster prevention of coal rock water injection.