采矿与安全工程学报2017，Vol.34Issue(6)：1067-1074,8.DOI:10.13545/j.cnki.jmse.2017.06.005
深井复合顶板条件下沿空留巷顶板变形特征试验及控制对策
Experiment of compound roof deformation characteristics of gob-side retaining entry in deep mine and support measures
摘要
Abstract
In order to research the deformation and failure mechanism of roadway surrounding rock of gob-side retaining entry with compound roof in deep mine, based on the engineering geological condi-tions of 1115(1) tailentry in Guqiao Coal Mine, the excavation period,the first mining period, roadway retaining period and the second mining period were simulated by using the self-developed physical model test system. The deformation characteristics of roadway roof were obtained. The compound roof fracture field was described based on the fractal geometry theory. The dynamic evolution characteristics of compound roof fracture field were analyzed. The results have shown that:1) The macroscopic failure type of the compound roof shows the shape of "︶" and the fractures distribute mainly in a low angle;2) The compound roof fracture develops rapidly with the rotation of the main roof and the compound roof fracture of upper filling body is obvious compression-shear fracture;3) The fractal dimension of compound osite roof increases gradually with the simulation process;4) A linear relationship between the fractal dimension and the roof subsidence is obtained. Based on research results, the support meas-ures of "strengthening support with mining process" and "strengthening the protection of roadway sur-rounding rock surface" for the gob-side retaining entry with compound roof in deep mine were proposed.关键词
沿空留巷/复合顶板/裂隙场/分形几何/护表Key words
gob-side retaining entry/compound roof/fracture field/fractal geometry/protection of roadway surrounding rock surface分类
矿业与冶金引用本文复制引用
杨朋,华心祝,杨科,庞冬冬,成世兴..深井复合顶板条件下沿空留巷顶板变形特征试验及控制对策[J].采矿与安全工程学报,2017,34(6):1067-1074,8.基金项目
国家自然科学基金项目(51274010) （51274010）
