Abstract: A number of ground fissures frequently occur over coal mining work face.Figuring out the relations between ground fissures' distribution，width and horizontal deformation can contribute to predicting and controlling ground damage caused by fissures.The distribution of ground fissures is studied via field measured data and the relationship among the horizontal distribution and distributive regularities in width of fissures，and the relations between ground fissures and coal mining are obtained.Finally the corresponding fitting formula is given.This research indicates that there are a close relationship between ground deformation and the width of fissures caused by coal mining.Fracture zones are corresponding to the tensile deformation zones.And，the sum of fissure's width is invariably less than that of horizontal deformation and only a small quantity of horizontal deformations can be reflected through ground fissures.

Key words: Coal mining, Surface fissures, Width, Distribution, Horizontal deformation