| bStudy on constitutive relationship of coal based on conventional triaxial compression test |
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| 作者姓名： | 杨永杰 楚俊 闫相宏 |
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| 作者单位： | （ Key Laboratory of Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266510, China |
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| 基金项目： | Supported by 0pen Fundation Subject of Key Laboratory of Disaster Prevention and Control（MDPC0603）; Shandong Special Fund of Science Device and Equipment Updating and Improving Proj ect（2006GG 1108097-14） |
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| 摘 要： | Constitutive relationship of coal under triaxial compression must be determined during solving the theoretical calculation and numerical simulation about coal body failure. This paper carried out conventional triaxial compression test on No.3 coal of Baodian Colliery using MTS815.03 servo-controlled rock mechanical test system. The results indicate that the failure process of coal can be divided into 5 stages： densification stage, apparent linear elastic deformation stage, accelerated inelastic deformation stage, fracture and developing stage and plasticity flow stage. Combined with the test results, the constitutive relationship model of coal can be simplified as the four segments of straight line model of elastic-plastic hardening-plastic softening-residual perfectly plastic. Through fitting calculation of test data, the segmented constitutive equation of coal can be obtained.
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| 关 键 词： | 煤炭标本 三轴压力 形变 煤矿开采 压力试验 |
bStudy on constitutive relationship of coal based on conventional triaxial compression test |
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| YANG Yong-jie, CHU Jun, YAN Xiang-hong.bStudy on constitutive relationship of coal based on conventional triaxial compression test[J].Journal of Coal Science & Engineering(China),2007,13(3):336-339. |
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| Authors: | YANG Yong-jie CHU Jun YAN Xiang-hong |
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| Affiliation: | Key Laboratory of Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266510, China |
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| Abstract: | |
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| Keywords: | coal sample triaxial compression constitutive relationship deformation fitting |
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