区域化结构在岩石破裂过程中的转换作用规律

Transduction Rule of Regional Structure in Rock Fracture

岩石在单轴压缩过程中内部会发生不同程度的损伤,导致区域化结构演变,这决定了岩石裂纹的萌生及最终破坏形态。为探究岩石内部区域化结构对岩石破裂影响的相互作用机制,基于声发射手段,通过波速成像获取岩石内部区域化结构的基础数据,运用数值模拟手段研究岩石在加载过程中各类区域化结构转换过程中的机制及其对岩石破裂起到的决定性作用。结果表明:①岩石内部区域化结构演变过程由初始结构决定,决定了其后期的相互作用转变,在加载过程中受到应力干扰作用而发生区域化结构体之间的相互转换。②岩石区域化结构在其内部空间分布的影响下,岩石裂纹萌生及最终破坏形态由其决定,岩石内部初始结构影响最终破裂关键位置区域。此结果对于岩石破裂及现场灾害防治起到预警作用。

In uniaxial compression,different degrees of internal damage will be occurred in rocks,resulting in regional structural evolution,which determines the initiation of rock cracks and the final failure pattern.In order to explore the interaction mechanism of the influence of the regionalized structure inside the rock on the rock fracture,the study obtains the basic data of the regionalized structure inside the rock by wave velocity imaging based on acoustic emission means,and researches the mechanism of the transduction of various regionalized structures in rock loading,and its decisive role in the rock fracture by numerical simulation means.The results show that①The evolution process of the regional structure inside the rock is determined by the initial structure,which determines the interaction transformation in the later stage.During the loading process,the interaction between the regional structures occurs due to the stress interference.②Under the influence of the internal spatial distribution of the regional rock structure,the crack initiation and final failure of the rock are determined by the regional rock structure,and the initial structure of the rock affects the key location of the final fracture.This result plays an early warning role in rock fracture and on-site disaster prevention.