厚层泥质顶板巷道支护难度分级研究与应用

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

为对厚层泥质顶板巷道的支护难度进行分级,引入适合处理复杂非线性系统问题的数学方法——突变级数法(CPM),选取顶板厚度、顶板强度、埋深等12个因素构建CPM评价指标体系;结合突变理论与模糊数学理论,根据突变级数值将巷道支护难度分为Ⅰ容易支护型、Ⅱ中等难度型、Ⅲ较难支护型和Ⅳ极难支护型4个级别;在对各难度级别分级评估的基础上,提出以锚网支护技术为基础的厚层泥质顶板巷道围岩控制对策。在黄岩汇煤矿进行的现场应用结果表明:用所提方法对厚层泥质顶板巷道支护难度进行分级结果准确;应用该方法可以判别支护难度较大的区域,为优化支护方式提供依据。

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 Ⅰeasy-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.