Similar simulation of overburden displacement characteristics of fully mechanized mining face

Taking 1232(1) fully-mechanized mining face of Xieqiao Mine of Huainan Mining Group as engineering background, overburden displacement characteristics during coal seam mining were studied by means of similar simulation experiment. The results show that with continuous advance of fully mechanized mining face, caving angle remains unchanged, caving zone and fault zone height increase gradually, and overburden are increasingly affected by mining. Peak value of overburden vertical displacement is located in the middle of goaf and decreases gradually at both ends. The overburden vertical displacement curve is symmetrical. With the increase of advancing distance of fully mechanized mining face, peak value of overburden vertical displacement increases continuously. With the increase of distance between overburden and coal seam, overburden vertical displacement decreases.