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Table 1 The physical and mechanical indices of surrounding and supporting material E [GPa] μ γ[KN/m3] [°] C[MPa] Grade IV rock 6 0.32 20 30 0.60 C25shotcrete 25 0.25 23 C25reinfoced concrete 30 0.20 25 Φ22 rock bolt 190 0.3 79 Finite element model shows in fig.6.
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[4] Zhida Li, Qiang Huang: Field Monitor of Surrounding Stress and Rheological Analysis in Tunnel Construction, Journal of Wuhan university of technology (transportation science &engineering), (2010.3) p. 129–133, in Chinese
[5] Qiang Huang, Zhida Li, Yanzhen Wu: Analysis on Surrounding Rock Stress in shallow-buried bias Tunnel, Natural Science Journal of Xiangtan University, 2010(1);25-29(In Chinese)
[6] Tingqing Yang: Viscoelastic theory and application, Science Press, Beijing. (2004) (In Chinese).

Acknowledgements This work was financially supported by the Natural Science Research Projects of Hebei Institution of Higher Learning (Z2010107).
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The specific surface area and pore size are the relative most important roles to influence the application of the mesoporous silica materials.
The mesoporous silica materials with various specific surface areas possess a multiple functions.
Therefore, the preparation of mesoporous silica materials by a convenient strategy has an important realistic significance.
Therefore, using the poly(pseudo)rotaxanes as the template agent may obtain the mesoporous silica materials with diverse specific surface area and pore size.
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Methods and Materials Sample collection and processing Zoobenthos was sampled at seven river cross-sections along the Songhua River on a river segment of around 66 km between Zhushuntun and Dadingzishan (Figure 1).
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Test Materials and Experimental Methods Test materials.
There are two kinds of materials used in the test: Si3N4 and Cr26.
Acknowledgements The research is supported by the National Natural Science Foundation of China (project No: 50676044) and Beijing Natural Science Foundation (project No: 3072008).
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In Ref. 6, the susceptibility of the magnetic powder testing was estimated with the help of Magnetic indicator bags (MIBs), which can be used in the magnetic testing alongside traditional techniques of application of flaw-detecting materials.
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Cristofari[6] analyzed the performances of a solar flat-plate thermal collector wholly manufactured in a copolymer material.
The results show that with high degree of stratification saving energy is higher than fully mixed tank and using polymer materials reduces the collector weight by 50% compared to a traditional metal collector.
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Chengkang Gao of Northeastern University (2012), Pointed out that raw materials manufacturing and operation maintenance was the most environment load in the process of large wind turbines [8].The representative research of the third stage, Weiguang Zhu of Northeastern University (2010), calculated a single wind turbine energy repayment time was 7 month [9].
Xiaotian Wang of Xian University Science and Technology (2012), Calculated a wind farm operations energy repayment time was 8 month [10].
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Each project environmental impact assessment must be conducted to strict control from the perspective of ecological services of size, quantity, color, material, shape and style, advocating is given priority to with natural landscape, local materials, in accordance with this scene, reflect the beauty of nature, for those high input, high consumption, high pollution projects resolutely put a stop to stimulate economic growth.
It is an entirely new way of economic growth, to realize the effective utilization of material and the sustainable development of economy and ecology.
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So we take the aluminium alloy LY12 as the material of the main body frame and the propulsion mechanism.
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