Rockburst is a type of dynamic failure and often causes considerable damage during the construction of underground engineering. Geological structures have been regarded as a crucial factor influencing rockburst distribution, and more related research is urgently needed. This paper presents microseismic monitoring information, characteristics of 151 rockbursts, and various structural planes collected in detail from a deep tunnel located in Southwest China. The results show that microseismic activity tends to increase when joints with large scale begin to appear and vanish. Rockburst risk always increases between the spandrels and around the intersection of two joint sets. The joint dip angle changes the rockburst risk. In the presence of one or two joint sets with a 70– 80° dip angle, rockbursts are more prone to occur. The conclusions can be interpreted with the discrete element method. When more joints are encountered, the total number of rockbursts may decrease, but the rockbursts are more likely to be strong or induce collapse, causing more damage. This research can improve the understanding of rockburst mechanisms and guide the choice of construction and support methods.

岩爆是一种动力破坏，在地下工程施工过程中往往会造成相当大的破坏。地质构造已被认为是影响岩爆分布的关键因素，迫切需要进行更多的相关研究。本文详细介绍了从西南某深部隧道收集到的微震监测信息、151次岩爆特征和各种结构面。结果表明，当大尺度节理开始出现和消失时，微震活动趋于增加。拱肩之间和两个接头组的交叉点周围的岩爆风险总是增加。节理倾角改变岩爆风险。在倾角为 70-80°的一组或两组节理的存在下，更容易发生岩爆。结论可以用离散元方法来解释。当遇到更多节理时，岩爆总数可能会减少，但岩爆更可能是强大的或诱发坍塌，造成更大的破坏。本研究可以提高对岩爆机理的认识，指导施工和支护方式的选择。