| 霓石正长岩力学特性研究 |
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| 引用本文： | 郭志.霓石正长岩力学特性研究[J].地质科学,1983,0(3):279-285. |
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| 作者姓名： | 郭志 |
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| 作者单位： | 中国科学院地质研究所 |
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| 摘 要： | 岩体内存在有许多直接看不到的隐微裂隙,其微小程度有时可达到只切割一个或半切割一个微小矿物颗粒。这些微小裂隙,直接影响着岩体的力学特性。因此,对岩体力学特性研究,不仅要从宏观上做大型岩体力学试验,也应从微观上将两者结合起来综合分析岩体的力学特性,这样将有利于宏观岩体力学性质指标的选择和工程处理措施的方案选择。笔者取霓石正长岩为试样,进行岩体力学试验。本文试图把宏观试验和微观观察结合起来研究岩体的力学特征。
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| 关 键 词： | , |
A STUDY OF MECHANICAL CHARACTERISTICS OF AEGIRINE SYENITE |
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| Guo Zhi.A STUDY OF MECHANICAL CHARACTERISTICS OF AEGIRINE SYENITE[J].Chinese Journal of Geology,1983,0(3):279-285. |
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| Authors: | Guo Zhi |
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| Institution: | Institute of Geology, Academia Sinica, Beijing |
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| Abstract: | This paper presents a study of failure mechanism and mechanical characteristics of rock mass by combining rock mechanical test with microscopic analysis. The results show that the mathematical statistics can not be simply used for a group of test results. In fact, failure mechanism and mechanical characteristics of rock mass are also controlled by microscopic structure of rock. The author has made a contrastive test on rock samples of same type under confining pressure σ3 = 300kg/cm2. And it is concluded that rock samples with well developed blind microcracks have low compressive strength and failed mainly in the form of tension-shear fracturing with predominance of tension fracturing; rock samples with few blind microcracks have the highest compressive strength and failed in the form of brittle shear fracturing; and rock samples with moderately developed blind micro-cracks have medium compressive strength and failed mainly in the form of shear-tension fracturing with predominance of shear fracturing.The paper has demonstrated that owing to the existence of inharmoniously developed blind microcracks some incompetent rock body are contained in competent rock body; that compressive strength of solid rock mass differs from that of incompetent rock mass by 2-5 times, cohesion factor C-by 1.7 times and coefficient of friction-by 2 times.The author has also proposed that division of mechanical characteristics of rock mass must be made on the basis of test results and extent of development of blind microcracks in rock body and that each of mechanical parameter values of a real rock body should be given individually according to the spatial distribution of field rock body and indoor test results of rock samples. |
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| Keywords: | , |
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