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Materials and Methods Materials.The rice straws were collected from Rice Research Institute of Shenyang Agricultural University, after being washed with distilled water and crushed with grinder then sieved with a standard sieve to obtain powder with sieves(40~100mesh ).
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Fig.1 Model of intact rock mass before and after bottom excavation Table.1 Mechanical parameters of model Materials Heterogeneity Elastic modulus (MPa) Compressive strength (MPa) Poisson’s ratio Weight density (KN/m3) Surrounding rock 6 20 80 0.25 26.2 Steel-fiber concrete CF30 8 25 120 0.18 28.00 Anchor bolt 200 210 345 0.3 78.4 Simulation results and discussion The graphs of elastic modulus and acoustic emission (AE) are shown in fig.2.
Acknowledgements This work was financially supported by the Major State Basic Research Development Program of China (2011CB013500), the Foundation for Innovation Research Groups of the National Natural Science Foundation of China (51121005), the National Natural Science Foundation of China (50909013).
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However, the strength of glass is not a material constant but depends on various parameters, which makes glass, amongst other things, a challenging building material.
Materials Small-scale soda-lime silicate glass specimens were used, and the edge strength was investigated with and without a coating.
Also the financial support of Swiss National Science Foundation (SNSF) is acknowledged.
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Lignocellulosic materials are generally termed as a dry matter derived from plant, animal biomass.
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Other types of tool materials, including ceramic, diamond and cubic boron nitride are highly reactive with titanium alloys and as a consequence are not used in the machining of these alloys [6].
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The suitable mechanical properties, good biocompatibility and degradation behavior make magnesium and magnesium alloy very attractive as a biodegradable implant materials.
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Acknowledgement This paper is supported by Key program for science and technology development of Zhejiang Province (No.2010C11068) and Natural Science Foundation of Zhejiang Province of China (No.Y1091078) References [1] Zhan Yage, Xiang Shiqing, et al.
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Acknowledgements This work was financially supported by the National Natural Science Foundation (50578025) and the Liaoning Provincial Natural Science Foundation (201102154) and the Liaoning Provincial Department of Education Foundation (L2010379).
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