强爆炸应力波作用下岩石地下洞室的破坏现象学

为了发展更准确实用的地下洞室抗爆工程类比设计方法,对强爆炸试验中地下洞室工程破坏效应进行了综合研究.讨论了强爆炸岩体应力波与自由场岩体破坏、岩石洞室应力波破坏的一般图像、洞室关键破坏部位与破坏方式、洞室破坏影响因素以及洞室破坏分区的问题.洞室的破坏在根本上是由爆炸荷载决定的,地质介质特征在很大程度上控制了洞室破坏的表现形式,洞室工程特征的变化又可使破坏程度和细节破坏形态发生改变.若场地岩体较均质、应力波传播和洞室破坏定量规律较清楚,工程设计时可先按破坏分区表进行洞室破坏的一级估计,然后再计入局部因素进行修正.

Failure of rock openings under intensive explosion stress wave

Dynamic failure of deep-buried rock openings under explosion stress wave is very important in the design and analysis of anti-explosion and anti-vibration engineering. The existing achievements about explosion tests are not systematic. The data from quite a lot of in-situ large explosion tests were analyzed. According to the phenomenology of engineering opening damage in in-situ tests and the correlative mechanical conditions, the general pattern, abnormality and its influencing factors were summarized. The failure of underground rock openings under intensive explosion stress wave is radically dependent upon the intensity and type of loadings. The characteristics of geological media also control the failure pattern of rock openings to large extent. Different configurations of rock openings will make the failure diverse in degrees and details. An up to the minute practical table of tunnel failure zoning was put forward for schematic engineering design and analysis in similar circumstances.