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The Evolution Rules of Overlying Strata Porosity Influenced by Mining Activation Guoqiang CHENG 1, a and Yanjin SONG 1, b 1 State Key Laboratory of Mining Disaster Prevention and Control, Ministry of Education, Shandong University of Science and Technology, Qingdao 266510,China agqcheng@sdust.edu.cn, bsongyanjin@hotmail.com Keywords: overlying strata, fissure, porosity, evolution rule Abstract.
Rock is a type of natural material containing microcracks.
Acknowledgement The study was supported by National Basic Reseach Program of China (2010CB226805), National Natural Science Foundation of China (51074099), the Program for Changjiang Scholars and Innovative Research Team in University (IRT0843) and State Key Laboratory of Mine Disaster Prevention and Control, Ground Pressure and Strata Control Innovative Team Fund of SDUST References [1] Z.J.Su: Research of Deformation Mechanism of Mining Overburden Separated Strata [D].
Fuxing: Liaoning Technical University Doctor Degree Paper. 2001(in Chinese) [2] Z.Q.Song: Control of Practical Mining Pressure (China University of Mining and Technology, Xuzhou 1988)(in Chinese) [3] F.X.Jiang: Journal of Xi’an Mining Institute.
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The feedstock materials are delivered by argon gas (99.999%) injected through a coaxial powder feeding nozzle.
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This process (agglomeration) is well known for film materials consisting of individual polymers.
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Result shows, the FRP layers would increase the stiffness, energy absorption, shear capacity and will be decreasing the ductility of steel plate as compared with composited steel plate with other materials as reinforcement concrete.
There are no other bonds between steel and FRP material another epoxy resin in CSF model.
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Preface ICSAM 2012, the 11th International Conference on Superplasticity in Advanced Materials, was held in Ecole des Mines Albi, France, from the 3 rd to 5 th July 2012.
Within these, 62 full papers were submitted and peer reviewed and are published in this book as a special edition of Material Science Forum Journal, by Trans.
Ecole des Mines d'Albi, that has at Institut Clément ADER an intensive activity in research focused on Materials and Processes, was honored to have been selected for the organization of the 2012 edition of ICSAM.
Numerous topics were covered during this conference dealing with - more fundamental aspects of the mechanisms of superplasticity, grain boundary sliding, deformation and cavitation, microstructures and textures, - superplasticity in various families of materials, like ceramics, light alloys, titanium alloys, intermetallics, - superplastic processing, including grain refinement and processing, high strain rate and low temperature superplasticity, superplastic forging and rolling, - numerical modeling of materials, forming process and SPF structure simulation, - material testing, forming dies, post SPF processes and properties, - industrial applications mostly in aeronautics and automotive.
During the conference the best poster Award, sponsored by AIRBUS, was attributed to Toshiaki Manaka, a young researcher form the Graduate School of Science and Engineering, Ibaraki University, Japan.

Zhou, Yang, Zhenyang Yu, “Microstructure and properties of in-situ generated Mg Al2O4 spinel whisher reinforced aluminium matrix composites”, Materials and Design 74, (2013), 644-651
Rohatgi a, “Tensile properties of reactive stir-mixed and squeeze cast Al/CuOnp-based metal matrix nanocomposites”, Materials Science & Engineering A, 611 (2014) 326–332
Weiping Chen, Yixiong Liu, Chao Yang, Dezhi Zhu, Yuanyuan Li, “(SiC+Ti)/7075Al hybrid composites with high strength and large plasticity fabricated by squeeze casting”, Materials Science & Engineering A, 609 (2014) 250–254
El-Sheikhb, “Microstructure, thermal behavior and mechanical properties of squeeze cast SiC, ZrO2 or C reinforced ZA27 composites”, Materials Science and Engineering A, 528 (2011) 2353–2362
I.Dinaharan, “Influence of in-situ formed ZrB2 particles on microstructure and mechanical properties of AA 6061 metal matrix composites”, Materials Science and Engineering A, 190 (2011) 07-15.