Effect of diagenetic variation on the static and dynamic mechanical behavior of coral reef limestone
作者机构:State Key Laboratory of Explosion&Impact and Disaster Prevention&MitigationArmy Engineering University of PLANanjing 210007China Naval Research InstituteBeijing 100070China
出 版 物:《International Journal of Mining Science and Technology》 (矿业科学技术学报(英文版))
年 卷 期:2024年第34卷第7期
页 面:893-908页
核心收录:
学科分类:081505[工学-港口、海岸及近海工程] 08[工学] 080104[工学-工程力学] 0815[工学-水利工程] 0824[工学-船舶与海洋工程] 0814[工学-土木工程] 082401[工学-船舶与海洋结构物设计制造] 0801[工学-力学(可授工学、理学学位)]
基 金:supported by the National Natural Science Foundation for Excellent Young Scholars of China(No.52222110) the Natural Science Foundation of Jiangsu Province(No.BK20211230)
主 题:Reef limestone Dynamic behavior Mineral composition Pore structure Wave propagation Energy dissipation
摘 要:Coral reef limestone at different depositional depths and facies differ remarkably on the textural and mineralogical characteristics,owing to the complex sedimentary *** explore the effects of pore structure and mineral composition associated with diagenetic variation on the mechanical behavior of reef limestone,a series of quasi-static and dynamic compression tests along with microscopic examinations were performed on the reef limestone at shallow and deep burial *** is revealed that the shallow reef limestone(SRL)is classified as a porous aragonite-type carbonate rock with high porosity(55.3±3.2)%and pore *** comparison,the deep reef limestone(DRL)is mainly composed of dense calcite-type calcium carbonate with low porosity(4.9±1.6)%and pore *** DRL strengthened and stiffened by the tight grain framework consistently displays much higher values of the dynamic compressive strength,elastic modulus,brittleness index,and specific energy absorption than those of the *** gap between two types of limestone further increases with an increase in strain *** appears that the failure pattern of SRL is dominated by the inherent defects like weak bonding interfaces and growth lines,revealed by the intricate fracturing network and mixed ***,although the preexisting megapores in DRL may affect the crack propagation on pore tips to a certain distance,it hardly alters the axial splitting failure of DRL under *** stress wave propagation and attenuation in SRL is primarily controlled by the reflection and diffusion caused by plenty mesopores,as well as an energy dissipation in layer-wise pore collapse and adjacent grain crushing,while the stress wave in DRL is highly hinged on the insulation and diffraction induced by the isolated *** process is accompanied by the energy dissipation behavior of inelastic deformation resulted from the pore-emanated microcracking.