Abstract
Effect of native fissures on the mechanical behaviour of rock under uniaxial compression
Highlights
With the rapid development of society and the construction of large engineering projects related to transportation, water conservancy and hydropower, oil and gas storage, and mining, among others, engineers are often faced with rock engineering design and construction challenges
To study the effect of fissures on the mechanical properties of fissured rock, a uniaxial compression experiment was carried out using fissured dolomite
(1) The existence of fissures reduces the velocity of acoustic wave in the rock, leading to an obvious "crack effect" for acoustic waves propagating in fractured rocks
Summary
With the rapid development of society and the construction of large engineering projects related to transportation, water conservancy and hydropower, oil and gas storage, and mining, among others, engineers are often faced with rock engineering design and construction challenges. Some researchers investigated the rock mass behaviour by considering single, double, and multiple cracks [7÷10], and new understandings on the stress distribution at crack tips and coalescence of fractures were obtained. The results from these investigations provided insight to further research on the deformation and failure mechanism of naturally fractured rock masses. In the area of rock defect morphology, Zhao et al [14] and Park et al [15] studied the crack propagation characteristics and rock strength and analysed the influence of the spatial distribution of fractures on the mechanical properties of rocks by prefabricating different holes and fissures in rock specimens.
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