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发生突发失稳破坏. 2.3 破坏过程 由现场调查及文献[13]知,层状节理岩体巷道顶板垮塌后的形状可视为等腰梯形.当采空区顶板可能发生Ⅰ,Ⅱ类破坏时,考虑内部结构具有对称性的特点,其承载结构可简化为图3所示的梯形拱. 图3 "梯形拱"承载结构示意图 Fig. 3 Diagram for bearing structure of "trapezoid arch......
, gypsum and other activators can form calcium silicate hydrates (CSH) and calcium aluminates hydrates (CAH) with high-strength network structure [12-14], so as to solidify the heavy metal ions and realize......
) The NARX neural networks are employed to calculate sub-series from the EWT method to forecast future solar radiation. The structure and principle of the NARX network are given in Section 2.4. 2.2 Ensemble......
properties [27]. Figure 2 Numerical model: Table 1 Parameter values of abutment structure elements [27] Table 2 Mechanical parameters of rock mass [27] The dynamic analysis in this paper is from......
明. 基于遗传算法的医药码垛机器人结构参数优化研究[J]. 机电工程, 2016, 33(11): 1289-1294, 1308. YU Tianbiao, QIAO Mu, LI Ming. Optimization of structure parameters of palletizing robot based on genetic algorithm in medicine[J......
]. Based on uniaxial compression tests, XIE et al [9] demonstrated that the strain energy released from rock plays a key role in rock structure mutation failure. LI et al [20] illustrated......
reduction in strength and bearing capacity after water immersion and the breakage of the structure under the combined action of soil self-weight pressure and additional pressure [42]. Therefore, loess......
. [3] 徐振丽. 镁合金复合镀层结构和耐腐蚀性能研究[J]. 农机使用与维修, 2020(1): 30-32. XU Zhen-li. Study on the structure and corrosion resistance of magnesium alloy composite coating[J]. Agricultural Mechanization Using......
-tolerance bio-inspired ZL205A/SiC composites with a lamellar- interpenetrated structure [J]. Materials Science and Engineering A, 2017, 708(21): 199-207. [3] LI Bo, SHEN Yi-fu, HU Wei-yue. Casting defects......
temperature[J]. Progress in Natural Science Materials International, 2019, 29(2): 210-216. [15] ZHANG J H, HU Z Q, XU Y B, et al. Dislocation structure in a single-crystal nickel-base superalloy during......