类砌体型危岩结构面形成与破坏演化机制分析
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摘要
灰岩区危岩岩体破碎,结构面发育,具有典型类砌体结构特征,发育的危岩破坏时具有明显解体现象。以灰岩区重庆南川金佛山甑子岩为例,分析了从陡崖到危岩的类砌体型危岩各结构面的形成,概化出灰岩地区具有类砌体结构特征的危岩地质模型。通过地貌演化分析了灰岩地区由侧向卸荷形成陡崖再到危岩破坏演化过程的五个阶段。其研究为合理揭示灰岩地区危岩解体破坏机制提供科学依据。
Unstable rock in the limestone area is fractured and its structural plane is well developed. It has typical quasi-masonry structural characteristics. In the processing of collapse, the unstable rock shows obvious disintegration failure phenomenon. Based on the analysis of geomorphological principles and taking the typical Zengzi rock in Chongqing Nanchuan Jinfo Mountain in limestone area as an example, the formation mechanism of structural planes of quasi-masonry unstable rock since cliff time is analyzed and the geological model of unstable rock with quasi-masonry characteristics in limestone area is generalized. Based on the geomorphological evolution, the five stages of evolution process from the formation of cliffs by lateral unloading to the destruction of unstable rock in limestone area are analyzed.The study provides a reference for reasonable revealing the mechanism of disintegration and destruction of perilous rocks in limestone area.
Unstable rock in the limestone area is fractured and its structural plane is well developed. It has typical quasi-masonry structural characteristics. In the processing of collapse, the unstable rock shows obvious disintegration failure phenomenon. Based on the analysis of geomorphological principles and taking the typical Zengzi rock in Chongqing Nanchuan Jinfo Mountain in limestone area as an example, the formation mechanism of structural planes of quasi-masonry unstable rock since cliff time is analyzed and the geological model of unstable rock with quasi-masonry characteristics in limestone area is generalized. Based on the geomorphological evolution, the five stages of evolution process from the formation of cliffs by lateral unloading to the destruction of unstable rock in limestone area are analyzed.The study provides a reference for reasonable revealing the mechanism of disintegration and destruction of perilous rocks in limestone area.
引文
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