地下洞室围岩稳定与否，关键取决于洞室开挖后的应力重分布问题。如果开挖后存在致命性的应力重分布，则对工程的影响将是灾难性的，即使可以处理，但对以后工程运行也存在严重的隐患。因此，对岩体地应力的研究、评价洞室围岩的稳定性，对决定工程方案是否成立以及确定相应的开挖和支护处理措施具有指导意义。%Whether or not the surrounding rock of an underground chamber is stable crucially depends on re -dis-tribution of stress of the underground chamber after excavation .If fatal re-distribution of stress exists after excava-tion, its influence on the project will be catastrophic .Even if it can be treated , serious hidden danger should exist in the future operation of the project .Therefore , the study on the rock mass in -situ stress and assessment of the underground chamber surrounding rock stability are of guiding significance for making sure if the project proposal is feasible and for determining proper excavation and support treatment measures .
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