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Table 1 Mechanical parameter for calculating Rock formation modulus of elasticity /GPa Poisson's ratio Density /t.m-3 Cohesive force/MPa Internal friction angle (°) Lithology number Interbed of soil and sand 2.0 0.21 2.0 1.8 25 1 Deep clay layer 3.8 0.27 2.05 2.3 26 2 Medium sandstone 7.0 0.25 2.40 3.0 30 3 Coal bed 1.8 0.25 1.47 1.2 30 4 Fine-medium grained sandstone 8.2 0.23 2.50 4.1 32 5 Boundary restrictions the model adopted are as follows: ①the model’s left and right boundaries are defined as single restriction boundary, and set u=0, v≠0(u is displacement along X direction and v is displacement along Y direction); ②the model’s bottom boundary, which has a much smaller shift along X and Y direction compared to goaf overburden rock, is defined as full restriction boundary, and set u=v=0; ③the model’s top boundary is alluvium, which has a comparatively large displacement along both X and Y directions, and is defined as free boundary, no restrictions attached.

Reported activation energies for EM are ranged from approximately 0.350.9eV depending on conductor grain size and metal alloy [11]. is Boltzman’s constant. is an empirically determined constant, J is current density flowing in the metal wire and can be calculated by EDA simulation, and are width and thickness of metal wire.
Bilinear damage theory, typically Manson theory can be described as, (5) (6) (7) Where is damage under stress 1, is damage under stress 2,is the accumulated lifetime, is the lifetime due to stress , is a coefficient and calculated by equation (7), and is index number and calculated by equation (6), is a constant.

Nano surface modifying can improve interface wettability, SiC dispersibility and dielectric properties and supply the better property. 1.Experimental The reagent including sodium hypophosphite and Nickel Sulfate which are analytically pure and grain size is between 20-30 nm and purity is 90%，manufactured by JILINSITONG Co., Ltd. 1.1 Experimental Methods (1)Pretreatment of (SiC)P (SiC)P had no catalytic activity itself.
Tab.1 Paramenters of microvave absorption of the paints Number Wave absorbing agent Wave absorbing agent content% Coating layer Wave absorbing property 1 SiC particles 10 2 18.34GHz, -3.72dB 2 Ni/SiC composite particles 10 1 17.01GHz, -16.47dB 3 Ni/SiC composite particles 10 2 16.11GHz, -25.51dB 3.Conclusion Based on condition in which nickel sulphate act as main salt, sodium hypophosphite act as reduction agent ,adopting chemical coating to modify the SiC particles,the conclusion are: (1)Comparing to the original (SiC)P, the product’s dispersion and conductivity were rised noticeably, the Ni/SiC composite particles were formed when large nickel coated on the surface of (SiC)P

Along with high strength and anticorrosion properties CCM have low fracture toughness and favourable friction properties which is associated with presence of porosity and an extensive network of grain boundaries.
The overlapping of curves 1 and 2 on Fig. 2(a) at various n numbers of turns of lapper testifies the change of dispersion mode, as it is proved by the results of practical research. 0 200 400 600 800 1000 1200 1400 -b (D UC) 25 50 75 100 125 150 175 n0, rev/min а) 1 2 0,05 0,07 0,09 0,11 0,13 0,15 Р, МPа 7,2 7,6 8,0 8,4 8,8 9,2 b) ln К (s) 1 2 Fig 2.

Experimental 2.1 Materials and the preparation process The UHMWPE used was supplied by Ticona as a powder, type GUR 2122, with an average grain size of 20 mm.
Acknowledgements The authors would like to thank help from “Chen Guang” project supported by Shanghai Municipal Education Commission and Shanghai Education Development Foundation(project no. 09CG65) and the support by Leading Academic Discipline Project of Shanghai Municipal Education Commission, Project Number: J51802.

Process of sample preparation is as follows, standard silicate sand is produced in DaLin of Inner Mongolia, 50-100mesh, round grain shape, addition of binder or curing agent is given according to practical production.
SEM was made in Japan, model number is JSM-6390LV.

Although the loss of the percolation among metallic grains with time and thus the decrease of the TPB cannot be avoided completely, it can be reduced substantially by yielding well-mixed narrow sized particles to control microstructure of the cermets.
Acknowledgements This project was funded by National High Technology Development Program of China under grant number 2003AA302440.

Table 1 The initial parameter table number designation symbol unit result 1 gas entrance diameter D mm 150 2 height of reaction unit H mm 1000 3 Density of magnetic material(Fe3O4) 1 kg/m3 5180 4 Oxygen carrier density(Fe2O3) 2 kg/m3 5240 5 grain diameter d mm 0.1-0.3 6 Particle mass flux m kg/s 0.0022 7 Air density 3 kg/m3 1.225 8 Air kinematic viscosity 3 kg/(m*s) 1.7894*10-5 9 Inlet gas velocity v m/s 0.6-1.0 10 Fixed time t s 2 11 Magnetic coefficient MagC N*m2/kg 0.2 Magnetic Force Model.This calculation is based on the Fluent software using its secondary development that is UDF programming added volume force source to simulate the magnetic field completed.Suppose added to the reactor of the applied magnetic field is distributed stable, the static magnetic field does not change with time.An attractive source phase (since the filtering effect) is added in the original space, it inhalation magnetic particles.

And fly ash-resin composite can be used for laid floor, inside adornment, wall sound insulation layer, can also be used for grain depot, sewers, swimming pool, canal project as well as the dam leakage [1, 2].
Tab.1 Experimental formula Sample numbers Modified fly ash/wt% epoxy/wt% 1﹟ 85% 15% 2﹟ 80% 20% 3﹟ 70% 30% 4﹟ 60% 40% 5﹟ 50% 50% Performance test and structure characterization Tensile properties tested by GB/T 1040.2-2006, tensile speed is 50mm/min.

Moreover, the Mössbauer spectra analysis performed for the alloys annealed at temperatures closed to temperature Top shows that there are no nanokrystalline grains till temperature of 720 K [10].
The calculated radii and numbers of coordintion spheres were compared to the structures characteristic for the Fe-B-Nb atom composition present in alloy after annealing.