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of the rock mass, the roof collapses easily. This is the main manifestation of ground pressure activity in the Jiaojia Gold Mine. Therefore, the investigations of joint fissures are of great..., 140: 31-40. DOI: 10.1016/j.coal.2015.01.003. [7] XUE Yi, GAO Feng, LIU Xing-guang, LIANG Xin. Permeability and pressure distribution characteristics of the roadway surrounding rock in the damaged zone......
on the top of the model was 8.8 MPa to simulate the 345 m overburden load. The lateral pressure coefficient (the ratio of horizontal stress to vertical stress) was 0.5, and the horizontal stress was applied... in-situ measurement. YAVUZ [21] assumed that the goaf material could be compacted to its original volume under infinite pressure, and proposed an equation describing the stress-strain behavior......
. There are a total of 40240 elements with dimensions of 10 mm×10 mm. Statistically, when the buried depth is over 1000 m, the lateral pressure coefficient k (k=P1/P2) ranges from 0.5 to 1.5 [43]. In current... the loading curve is used for DR phase and SIDR=2 indicates the loading curve is used for both DR and dynamic analysis phases. For the preloading calculation, the body force load and distributed pressure......
, it has been shown that the incorporation of nanoparticles to a metallic matrix results in the generation of a series of geometrically necessary dislocations due to the CTE (coefficient of thermal... nanocomposites through a novel two stage casting process [J]. Materials Science and Engineering A, 2013, 582: 262-269. [20] SHAYAN M, NIROUMAND B, TOROGHINEJAD M R. Effect of applied pressure on mechanical......
for adherent anode slimes in copper electrorefining[J]. Physicochemical Problems of Mineral Processing, 2016, 52(1): 295-302. [4] KALLIOMAKI T, WILSON B P, AROMAA J, LUNDSTROM M. Diffusion coefficient of cupric......
control at a rate of 0.12 mm/min, and the system automatically recorded the pressure and displacement data of the specimens. 3 Experiments 3.1 Experimental conditions The anchoring type and flaw inclination... that of the specimens without a bolt. Additionally, the reinforcement effect of the pre-stress in the bolt can be approximately equivalent to the lateral pressure exerted on the specimen along......
temperature on Zn and Fe dissolution was investigated by introducing sulfuric acid at 70% of the raw material quality under the conditions of atmospheric pressure, heating rate of 5 °C/min and a roasting time... at higher temperatures. 3.1.2 Influence of sulfuric acid dosage The influence of sulfuric acid dosage on Zn and Fe dissolution was investigated under the conditions of atmospheric pressure......
is also a type of rock; therefore,Eq. (4) is suitable. For FRP-confined concrete columns, σ1 is the FRP-confined compressive strength fcc, σ3 is the confinement pressure fl, and σc is the compressive... on the discussion above, the confinement pressure fl in Eq. (11) can be replaced by fl·f(ρ). The Eq. (11) can be written as: (12) Through regression analyses using FRP- confined undamaged......
;Diffusion coefficient of Al and Cu under different temperatures 坐标的差值即为原子界面扩散过渡层厚度.本文的Cu/Al/Cu模型存在两个界面区,图4(a)~(e) 5个图给出了Cu/Al多层膜在不同温度(953,973,993,1013,1033 K)下沿Z轴的原子浓度图.分析图5可以得出在过渡区内,Cu原子扩散到Al层内部,Al原子同......
robust. However, there was a variation in the system parameters due to wear/tear. Moreover, the FFOPI- FOPD introduced in Ref. [43] provides a fast and smooth response and also it offers less...) and Eq. (3), where M and L denote coefficient vectors, Jp indicates prey’s position vector, J denotes position vector of grey wolves and it specifies current iteration. Eq. (4) and Eq. (5) denote......
