某尾矿库年久排洪隧洞单双硐室结构稳定性研究

Study on Structure Stability of Single and Double Chambers About Old Flood Discharge Tunnel of a Tailing Reservoir

该文依托某尾矿库1km排洪隧洞勘察工程,对硐室顶板、侧壁、底板、内部围岩强度及完整性进行无损测试,并采用数值分析方法,计算隧洞衬砌、锚杆结构支撑受力情况,反推已建构件极限受力能力及变形曲线,判断排洪隧洞稳定性状态,为尾矿库安全生产及类似隧洞勘察评价提供参考。

In this paper,based on the survey project of 1 km flood discharge tunnel of a tailings reservoir,the nondestructive detection of strength and integrity of surrounding rock in chamber roof,side wall,bottom plate and inside are carried out.The numerical analysis method is used to calculate the stress condition of tunnel lining and anchor bolt structure support,the ultimate stress capacity and deformation curve of the constructed parts are deduced,the stability state of flood discharge tunnel is judged.And it provides reference for the safe production of tailings reservoir and for the survey and evaluation of similar tunnel.