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Abstract The range of overlying rock fracture zone attaches great importance to prevention and control of mine water hazards, in order to analyze the height of overburden caving zone and fracture zone under different mining distance of Donghe Mine, the height of caving zone and water guide crack zone was conducted by numerical simulation of FLAC3D. The water conduction height was stable at 97 m with 400 m mining, fracture ratio 9.7, caving heig
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