综采导水裂隙带多因素影响指标研究与高度预计

在分析了导水裂隙带发育高度受多种因素影响的前提下，提出了新的参数指标即硬岩岩性比例系数，代替顶板岩层单轴抗压强度，避免了现行规范中坚硬、中硬、软弱、极软弱顶板类型划分时单轴抗压强度统计不确定问题，以及未反映顶板软硬岩层组合结构问题。以39例综采导水裂隙带实测数据为基础，采用多元回归分析，得到综采导水裂隙带高度与煤层采高、硬岩岩性系数、工作面斜长、采深、开采推进速度多因素之间的非线性统计关系式，并用于淮南谢桥矿首采面的导水裂隙带高度预计。

Index of multiple factors and expected height of fully mechanized water flowing fractured zone

On the premise of analysis on the development of water flowing fractured zone height by influence of various factors,a new parameter index namely hard-rock lithology ratio was proposed,which insteads of roof strata combination uniaxial compressive strength,avoids determination of statistical problem of uniaxial compressive strength by the type of hard and medium hard,weak,extremely weak roof in the current specification,and doesn’t reflect the hard and soft strata combination roof structure.Based on the measured data of fully mechanized water flowing fractured zone of 39 cases,using multiple regression analysis,many factors of non-linear statistic formulas were obtained among height of fully mechanized water flowing fractured zone and mining coal thickness,hard-rock lithology ratio,working face length,mining depth,mining face advance and used for the expected height of water flowing fractured zone in Huainan Xieqiao first face mining.