Study on Uniaxial Compression Deformation and Fracture Development Characteristics of Weak Interlayer Coal–Rock Combination

• DOI: 10.3390/fractalfract7100731
• Publication Date: 2023-10-02T08:39:30Z
• Authors: Shun Lei; Dingyi Hao; Shuwen Cao
• Keywords: Slab

With increases in mining depth and intensity, disasters such as stress concentration, slab failure, coal body dynamic outbursts at the coal–rock interface have become more serious. Therefore, it is important to analyze stress–strain behavior of combinations explore deterioration process failure characteristics combinations. In this study, we used field survey, theoretical analysis, numerical simulation methods microstructure influence interlayer thickness on composite body. The results show that with increase thickness, compressive strength gradually decreases. This reduction mainly due dividing sample, resulting a decrease equivalent elastic modulus body, weakening overall integrity, carrying capacity. addition, mode mechanical properties combination are influenced by position. Different “soft layer” positions can lead changes modes composite. position also has significant fracture propagation study provides an reference for control deformation instability regional rock mass modification underground engineering.