Experimental Study on Strata Behavior Laws at Fully Mechanized Mining Face in Near Shallow Coal Seam

In order to study strata behavior laws of fully mechanized face of Hanglaiwan Mine, with similar simulation experiment method, the breaking process characteristics of overburden rocks in near shallow coal seam are studied. The periodical weighting distance of 30101 working face and work resistance of supports was determined. The abutment pressure distribution laws of working faces and movement and deformation laws of overlaying strata were obtained. This research indicates that the roof pressure presents long and short periods and the movement and deformation of overlaying strata has the character of "two zones" in 30101 mining face.