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《Journal of University of Science and Technology Beijing》 2006-07
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Dividing guideline and emulating determination of “three zones” of the depressing zones overlying a goaf

HUANG Zhian 1), TONG Haifang 2), ZHANG Yinghua 1), LI Shibo 1), NI Wen 1), SONG Jianguo 3), XING Yi 1)1) Civil and Environmental Engineering School, University of Science and Technology Beijing, Beijing 100083, China 2) Beijing Kuangtong Resource Development Consulting Co., Beijing 100037, China 3) Huajin Coking Coal Company, Lishi 033315, China  
In order to divide “three zones” of the depressing zones overlying a goaf accurately, the guideline to divide the “three zones” is presented: specifying the height of the rock stratum whose stress surpasses the yield or shear strength of itself as the upper bound of the fracture zone, while specifying the height of the rock stratum whose two-way tensile stress both surpasses the tensile strength of itself as the low bound of the fracture zone. FLAC software was used to determine the boundary of a coal mine that was validated by the effect of corresponding methane drainage. The result indicates that the division guideline is rational and useful. This method can be used generally to divide “three zones” of the depressing zones overlying a goaf.
【CateGory Index】: TD823
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