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Zhang Y.-X.,Chongqing University | Xu H.,Chongqing University | Xu H.,Chongqing Institute of Geology and Mineral Resources | Xu H.,Key Laboratory of Geology for Mineral Resources and Environment
Yantu Lixue/Rock and Soil Mechanics | Year: 2010

The interior accelerated corrosion experiment is adopted to study the bond characteristics in mortar bolt anchoring body after mortar corroded. The relationship of interface bond behavior changing with the mortar corrosion level is achieved by means of testing the bond characteristics of bolt-mortar interface and mortar-matrix interface in mortar corroded anchoring body. The results show that: with the development of mortar corrosion, the bond strength of bolt-mortar interface and mortar-matrix interface decrease linearly; the shear stiffness in bolt-mortar interfaces reduces with the increasing of corrosion time; otherwise the corrosion time has little influence on the shear stiffness in mortar-matrix interface, but the chemical adhesion in mortar-matrix interfaces decreases with the rising of corrosion level. Source


Li G.,State Land and Resource of Wansheng | Chensi,Key Laboratory of Geology for Mineral Resources and Environment | Li D.,Key Laboratory of Geology for Mineral Resources and Environment | Li X.,Key Laboratory of Geology for Mineral Resources and Environment
Procedia Environmental Sciences | Year: 2011

This paper conducts further study in sedimentary environment of Ordovician and living environment of Sinoceras in Wansheng Stone Forest through the analysis of biofacies characteristic of Sinoceras of this district. Combined with the study of mollusk growth pattern, this paper initially studies the reason why Sinoceras has large individual scale. © 2011 Published by Elsevier Ltd. Source


Li D.W.,Key Laboratory of Geology for Mineral Resources and Environment | Liao Y.P.,Key Laboratory of Geology for Mineral Resources and Environment | Li G.B.,State Land and Resource of Wansheng | Chen S.,Key Laboratory of Geology for Mineral Resources and Environment
Procedia Environmental Sciences | Year: 2011

This paper makes a research on "dragon scale felsenmeer" in Wansheng District in Chongqing by analyzing geological structure of limestone area in which "Crackle" has formed in South China through referring large amounts of data, and combing with the analysis of Ordovician sedimentary environment and diagenetic conditions. Based on the analysis, this study has made an initial judgment that "dragon scale felsenmeer" is controlled by sedimentary pattern in regional structure dynamic and sedimentary environment, and the pressure in diagenetic conditions. © 2011 Published by Elsevier Ltd. Source


Yang L.,Chongqing University | Yang L.,Chongqing Institute of Geology and Mineral Resources | Yang L.,Key Laboratory of Geology for Mineral Resources and Environment | Wu D.,Chongqing University | And 6 more authors.
Yingyong Lixue Xuebao/Chinese Journal of Applied Mechanics | Year: 2010

In the paper, layered rock mass is viewed as a Cosserat medium firstly and is investigated by the homogenization method, A new equivalent constitutive relationship is obtained by means of the FEM program based on the MATLAB, which not only reflects the bending effect of the layered rock mass utilizing the especial couple stress, but also interprets the mechanics of jointed rock mass combining macro with micro scopes. Finally, s an example the underground cavern is numerically analyzed and the results are compared with the ones via three different other methods: the explicit joint model, the transversely isotropic model and the homogenization Cosserat equivalent model, The numerical results prove that the FEM program is effective and the new method is of feasibility. Source

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