Experimental study on water-rock interaction characteristics of sandy mudstone in Shanghai temple coal mine

The coal measures strata in ShangHai Temple Yingjun first colliery is broken ground.In order to solve construction of coal mines,Representative rock samples is tested by X-ray diffraction.Mineral compositon is studied from the microcosmic view.After observation on clay minerals,montmorillonite and kaolinite are the main microfactors that influence the water-rock physical properties,which are easy hydrophilic.Based on the soften experimental,The characteristics of the rock strength decreases are analyzed.The curve feature relationship between quality and the number of crumbing is investigated by the test of disintegration.The study is great value to the colliery construction and the design of soft rock roadway support.