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一、概述声发射技术作为各种金属和非金属材料无损检测以及各种工程构件稳定性监测的手段,在国内外均已获得广泛应用,其中对岩石声发射活动的研究及其在岩石工程中的应用,实际上可能比金属材料的声发射现象更早地为人们所认识。早在本世纪三十年代末期,美国矿务局的工程师Obert和Duvall就发现了受压力作用的岩石结构有声发射活动存在。他们在深矿井内用声波探测法研究金属矿的矿柱时,偶然发现在将发射探头从矿柱上移开后,仪器仍然接收到某种信号。最初,他们以为是所用的仪器出了毛病,但后来经过检查和反复试验,
I. Overview Acoustic emission technology has been widely used both at home and abroad as a means for non-destructive testing of various metal and non-metal materials and for the stability monitoring of various engineering components. The study of acoustic emission in rocks and its application in rock engineering The application may actually be known earlier than the acoustic emission phenomenon of metal materials. As early as the end of the 1930s, engineers of the United States Bureau of Mines, Obert and Duvall, discovered the existence of acoustic emission activity in rock structures under pressure. When they studied the pillars of metal mines in the deep mine using acoustic detection, they accidentally discovered that the instrument still received some signal after removing the probe from the pillar. Initially, they thought that something was wrong with the equipment used, but after inspections and trials,