Evaluation of Impermeability of Coal Seam Floor when Mining with Water Pressure
Impermeability of coal seam floor is one of the most important factors for a safe coal mining with water pressure. Based on geologic data analysis，field observation and laboratory testing and analyzing，a systematic study was done to the geological conditions of Taiyuan Formation(C3t) coal seam mining under hydraulic pressure in Shaqu Coal Mine. Through the study on lithology and sedimentary facies，Fengfeng formation(O2f) was divided into 4 segments and could be regarded as relative aquiclude. The impermeability of the aquiclude was further investigated by means of slice observation, mercury penetration and servo experiment. The rock voidage is mainly ultramicropore and micropore. The throat diameter is very small, so is the permeability value under complete stress-strain permeability test. Finally the conclusion was put forward that Fengfeng Formation can be regarded as a relative water-resisting layer, which will be favorable to the safe mining of Shaqu Coal Mine.
impermeability coal seam floor mining with water pressure
YANG Weifeng XIA Xiaohong GUO Yinghai
School of Resources and Earth Science,China University of Mining and Technology,Xuzhou, Jiangsu,China
国际会议
The 2007 International Symposium on Safety Science and Technology(2007采矿科学与安全技术国际学术会议)
河南焦作
英文
336-340
2007-04-17（万方平台首次上网日期，不代表论文的发表时间）