Research on support difficulty classification for roadways with thick mudstone roof and its application

doi:10.16265/j.cnki.issn1003-3033.2017.11.021

Abstract

Abstract: To classify the support difficulty of roadways with thick mudstone roof, CPM, a good mathematical method to solve complicated nonlinear problems was adopted. 12 factors, including the thickness, strength, depth etc. were selected to build CPM evaluation index system. Based on catastrophe theory and fuzzy mathematics theory, roadway support difficulty was classified into four levels, Level Ⅰ easy-supporting type, Level Ⅱ moderate-difficult-support type, Level Ⅲ relative-difficult-support type and Level Ⅳ extreme-difficult-support type. On the basis of the assessment of support difficulty levels, control measures based on bolt-net support technology were presented. This method can be used to determine regions with greater difficulty in support, which provides the basis for optimizing the support mode. The engineering application made in the Huangyanhui coal mine shows that the support difficulty classification is accurate.

Key words: thick mudstone roof, roadway, catastrophe progression method (CPM), support difficulty, classification

CLC Number:

X936

MA Zhenqian, JIANG Yaodong, WU Guiyi, ZUO Yujun, GAO Lin. Research on support difficulty classification for roadways with thick mudstone roof and its application[J]. China Safety Science Journal, 2017, 27(11): 121-125.

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