页岩中开挖洞室的塌方预报及判据

Forecasting and Criterion of Rock Slid during Excavation in Shale

本文介绍了清江隔河岩电站厂房高边坡201夹层处理时页岩中洞室开挖的稳定性监测。在实测变形的基础上划分出等速变形和加速变形阶段,根据T_i与T_(i-1)关系建立了页岩失稳判据和塌方预报方法,并且在工程建设中成功地进行了8次预报。

This paper describes the in-situ stability monitoring of the chamber of Qingjiang Geheyan Hydrolic Power Station during excavation in shale for treating the weak seam 201 in the high slope. There are two deformation stage (T_i, T_(i-1)) according two insitu measured results, i e , deformation stage at a constant rate and that at accelerating rates. Based upon the relation between Ti and T_(i-1), the authors have put forward the off-stability criterion of the shale as well as the method to predict the offstability.