Research on Water Flowing Fracture Development Features of Shallow Depth and Long-Wall Coalface under Unconsolidated Aquifer
The developments & distribution features of water flowing fracture are the key factors for actualizing shallow depth aquifer-protective mining, which can offer theory guidance for interdicting watertransmitting channels. Based on the mining practice of No. 51201 long-wall coalface belongs to Shendong Mining area, TYGD10 type strata detecting apparatus & numerical analysis software RFPA2D (Rock Failure Process Analysis System 2 Dimension) were used for analyzing the water flowing fracture development features, the whole dynamic development process and the water height change features in detecting hole along with the coalface mining of shallow thin basement rock long-wall coalface under unconsolidated aquifer in detail. The research we have performed demonstrated that the caving zone strata develop upwards jumping with strata thickness & the water flowing fractured zone strata move horizontally and the fractures develop upwards. The numerical analysis and the observing results showed that the advance fissures were underdeveloped in overburden strata The caving zone height is 5-6 times of mining height & the water flowing fracture zone height is 10.2 times at least. The regions ahead the coalface 8-10m & behind 10-15m are the key area in which the water level depressing rapidly for adopting aquiferprotective mining technical measures. The research results could provide references for aquiferprotective mining under similar conditions.
unconsolidated aquifer shallow coal seam water flowing fracture observation aquifer-protective mining
Wang Xufeng Zhang Dongsheng Wang Hongsheng Cui Tingfeng
School of Mining Engineering, China University of Mining & Technology, Xuzhou 221116, China School of Mining Engineering, China University of Mining & Technology, Xuzhou 221116, China State Ke
国际会议
The 3rd International Symposium on Modern Mining & Safety Technology Proceedings(第三届现代采矿与安全技术国际学术会议)
辽宁阜新
英文
19-23
2008-08-04（万方平台首次上网日期，不代表论文的发表时间）