Mechanism of roof separation water disaster in thick coal seam
SUN Kui
WANG Ying
LI Cheng
CHEN Jianping
FANG Gang
Abstract：In order to investigate the mechanism of the disaster about separation water of the coal seam roof.The paper took coal face 1418 of one mine in Shaanxi Jiaoping mining area as the research object and analyzed the characteristics and geological conditions of water inrush.Based on the "beam balance theory",the authors distinguished the disaster of the bed separation development horizon and calculated the development of bed separation water cycle interval.Using UDEC numerical simulation software,it is the development process of overburden separation and water-flowing fractures zone that were simulated.The research explained the disaster " cavity type" of bed separation development between Zhiluo Formation mudstone and Yijun Group cobble conglomerate.The interval distance between the breakage of key stratum is 190 m.The height of water flowing fractured zone is about 245 m,which conducts the phreatic aquifer of sandstone fissure groundwater in the downstream of Luohe Formation.The water inrush of the roof separation is characterized by the dynamic periodicity.With the increasing of roof strata destructiveness and breaking of key strata,stable "water store" is broken and is crushed into the coal mine by the water-flowing zone before "cavity" type of bed separation form stable water storage,which leads to the accident of water inrush.Furthermore,with the periodic rupture of the overlying strata,the water inrush of bed separation is periodically developed.
Keywords：roof separation waterwater-flowing fractured zonenumerical simulationdisaster causing mechanism
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 14-21 )