Research on the Characteristics of Shale Three-axis Compression Sound Emission Features

Abstract

 In the shale gas development, the lack of stability caused by the transformation of the reserve layer is an important engineering problem to be solved. This article is based on the compression test and sound launch technology. The impact of rock destruction, crack type, and the process of sound launch features during compression. The results show that: The bell counting count of sound transmission is volatile and there is a gap. On the eve of the stress peak, the bell counting count rapidly increased to the maximum value; the energy is small in most of the time, the energy increases when the crack expansion, and the broken damage occurs in the rock -sample. At the same time, the energy released is the most.