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. Hence, it can improve the control effect on surrounding rocks. All these could be helpful references for the design of bolt support in deep underground mines. Key words: high stress; soft rock; bolting... today. The deformation and failure of surrounding rocks are serious under a high in-situ stress. In particular, when the geological conditions of the roadway are poor, the surrounding rock is extremely......
)). Layered ore bodies host in the manganese-bearing rocks. The rocks consist of argillaceous volcanic rock, argillite, carbonate rock and siliceous rock. The deposit is a high grade manganese deposit... are distributed within the purple-red calcareous shale. Qujiashan is a high-grade w(MnO)=8.92% to 18.76%) manganese deposit with low-phosphorus w(P2O5)=0.08% to 0.16%) content. It also has a low total REEs......
soil or rock mass is excavated, the balance of initial stress around empty area will be destroyed, and then, the stress redistributed. If the induced stress exceeds the ultimate strength, the surrounding soil or rock mass will be destroyed and move towards the empty area until the stress reached a new balance. The stress after redistributing was called mining-induced stress......
[1]. Extensive researches have been done in ore field from petrogenic age, geochemical characteristics of the intrusion, genesis of rock body [2-6], geodynamics [7-8], geological features of deposit... homogenization temperature about fluid inclusions in the Longmenshan copper-polymetallic deposit (Fig. 5), it can be seen that the fluid inclusions in sample LMS-566-1 and LMS-575-8 have high......
is well consistent with the numerical results. This finding may be significant in designing new PDC cutters with lower residual stress and high cutting behavior. Key words: polycrystalline diamond... in the investigation. 2 Thermal residual stress analysis 2.1 Theoretical analysis for thermal residual stress PDC obtained under high pressure and high temperature, consists of a polycrystalline diamond (PCD) layer......
in the code to simulate dynamic failure characteristics of hard brittle rock due to stress wave. The material model permits progressive degradation of tensile strength and shear strength across smeared..., severer and wider damage zones with discontinuous failure regions will be induced in the rock under lower gradient stress rate and high dynamic stress amplitude. The findings in this paper are beneficial......
Stress Dependence of Transformation Plastic Behavior Tatsuo Inoue1 (1.Fukuyama University, Fukuyama/Hiroshima, Japan) 摘要:Transformation plasticity is known to play an important role in the course... a new method by use of four-point bending system of a beam to identify transformation plasticity coefficient taking advantage of its easiness and high accuracy compared with other conventional methods......
factors affecting the stability of surrounding rock in high-pressure hydraulic tunnels. In this work, the effects of the seepage field were firstly simplified as a seepage factor acting on the stress...Stress characteristics of surrounding rocks for inner water exosmosis in high-pressure hydraulic tunnelsYU Jin(俞缙)1, 2, 3, LI Tian-bin(李天斌)2, ZHANG Jian-zhi(张建智)1, CAI Yan-yan(蔡燕燕)1, 3(1......
Effect of anisotropy on microstructure and high temperature stress rupture properties of Ni3Al base single crystal alloy KONG Zhi-gang(孔志刚), HAN Ya-fang(韩雅芳), LI Shu-suo(李树索) School of Materials... on microstructure and high temperature stress rupture property of Ni3Al base single crystal alloy was investigated. The single crystal specimens were produced by screw selection crystal method......
Mo deposit have relatively high SiO2, K2O and Al2O3 contents, low CaO, MgO and P2O5 contents, high LREE contents, negative Eu anomalies, high-K calc- alkaline series or shoshonitic characteristics... J. Cent. South Univ. (2018) 25: 1489-1500 DOI: https://doi.org/10.1007/s11771-018-3842-4 Petrogenesis of granite from Xiaofan Mo deposit, Dabie Orogen LIU Qing-quan(刘清泉)1, 2, SHAO Yong-jun(邵拥军)2......