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探讨了在采煤工作面上方地表裂缝产生的原因，从岩土力学角度分析了地表裂缝与水平变形之间的关系，并且给出了地表裂缝宽度的具体计算公式。
This paper discusses the causes of surface cracks above mining face, analyzes the relationship between surface cracks and horizontal deformation from the perspective of rock mechanics, and gives the concrete formula of the width of the surface cracks.