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为了解某山岭隧道的地应力状态及为岩爆预测提供依据,在该隧道沿线选择了2个有代表性的位置,采用空芯包体应力计进行地应力测量。测量结果表明:该区域最大主应力近于水平,最大主应力量值为16.14MPa,方向为S65。E,测量结果与现今区域构造应力场相吻合。最后在实测地应力和岩石力学试验的基础上,对该山岭隧道的岩爆强度进行了预测,并提出了相应的防治措施。
In order to understand the geostress status of a mountain tunnel and provide the basis for the prediction of rock burst, two representative locations along the tunnel were selected and the stress measurement of hollow enclave stress was carried out. The measurement results show that the maximum principal stress in this area is near the level and the maximum principal stress is 16.14MPa and the direction is S65. E, the measured results coincide with the tectonic stress field in today’s area. Finally, based on the measured geostress and rock mechanics test, the rock burst strength of the mountain tunnel is predicted, and corresponding control measures are put forward.