... difficulties, such as the breakouts of the boreholes, core discing, and failing to be fractured, will be encountered in the stress measurements. The phenomena, including the brittle failures of the intact rock mass and core discing are directly related to high stress level. Hence, abundant information can...

... ABSTRACT: Excavation induced stress change is a significant and considerable factor to drive the brittle failure in the underground opening. Rockburst, as a type of brittle failure, has became a great threat to the construction of mining, traffic tunnels, hydropower station etc. With Hoek...