用沙坝矿红页岩硐室断面位移观测与分析

Observation and Analysis on Displacement Convergence of Red Shale Chamber Cross Section of Yongshaba Mine

开磷集团用沙坝矿红页岩为缓倾角的层状岩体,层理面倾角范围为20°～45°。硐室掘进后围岩变形具有初期变形量大,增长速率高,且增长速率随时间增加而逐渐减小的趋势,高应力软质层状岩体硐室围岩具有偏压和流变特性,且未支护硐室发生不稳定变形,最终产生失稳破坏。

Red shale of Yongshaba Mine of Guizhou Kailin Group is layered rock mass of gentle inclined, bedding plane angle scope is 0° -45°. Initial deformation amount of surrounding rock deformation was large, increasing speed was high, and had the trend of growth rate decreases gradually with increase over time after chamber excavation, chamber surrounding rock of high stress soft nature layered rock mass had characteristics of bias and theology, and unsupported chamber unstable deformation hap- pened due to instability and destroy finally.