Study on acoustic emission and local deformation characteristics of feldspar vein-intrusive metagabbro at different angles of splitting
Source abstract
Abstract
Feldspar vein-intrusive metagabbro is a special geological structure, and different stress angles have an important influence on the fracture mode and deformation characteristics of metagabbro. A Brazilian splitting test on feldspar vein-intrusive metagabbro was performed using three distinct stress angles (0°, 45°, and 90°), and acoustic emission signals and strain characteristics were monitored synchronously during the test. The results showed that the damage pattern of the feldspar vein-intrusive metagabbro was related to the feldspar mineral perforation damage on the main rupture surface. With the increase in stress angle, the percentage of high peak frequency increased gradually. The phenomenon of strain lagging stress appeared in the rock samples before the peak damage. The feldspar minerals played a controlling role in the expansion of microcracks in the feldspar vein-intrusive metagabbro. Significant differences in the local deformation coordination of rocks under different stress angles were observed. The deformation coordination of rock samples with a stress angle of 0° was much lower than that of other rock samples. This study is of great significance for the understanding of the deformation and damage laws of similar geological structures and also provides an important theoretical basis for the stability of deep chambers.
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Research context
OpenAlex topics: Rock Mechanics and Modeling · Geophysical Methods and Applications · earthquake and tectonic studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
China Coal Research Institute 1 , Beijing 100013, China
Beijing China Coal Mine Engineering Company Limited 2 , Beijing 100013, China
National Engineering Research Center of Deep Shaft Construction 3 , Beijing 100013, China
Beijing Key Laboratory of Urban Underground Space Engineering, University of Science and Technology Beijing 4 , Beijing 100083, China
Funding
The National Natural Science Foundation of China · Major Scientific and Technological Innovation Project of Shandong Province · Tiandi Technology Co., Ltd. Innovation and Entrepreneurship Fund Project
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