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Trans. Nonferrous Met. Soc. China 22(2012) 2241-2247 Numerical simulation of optimum mining design for high stress hard-rock deposit based on inducing fracturing mechanism YAO Jin-rui1, 2, MA... excavation order is more helpful for ground pressure to break rock than downward excavation order. Key words: inducted fracturing; high stress hard-rock deposit; excavation case; roadheader excavation......
Germany, part of Springer Nature 2021 Abstract: The safety factor of roof under deep high stress is a quantitative index for evaluating roof stability. Based on the failure mode of surrounding rock... of overlying rock, but also subjected to high stress. When the external load exceeds the ultimate bearing strength of the roof, the goaf roof is prone toarch collapse and bending fracture, which induces......
J. Cent. South Univ. (2019) 26: 3126-3139 DOI: https://doi.org/10.1007/s11771-019-4241-1 A value adding approach to hard-rock underground mining operations: Balancing orebody orientation and mining...; orebody orientation; mining direction; stope layout optimization Cite this article as: Martha E. VILLALBA MATAMOROS, Mustafa KUMRAL. A value adding approach to hard-rock underground mining......
stress analysis method of seismic response for high tailings dam was developed according to the results of engineering geological exploration, static and dynamic test and stability analysis... acceleration, seismic dynamic stress and pore water pressure were obtained. The results show that the seismic stability and liquefaction resistance of high tailings dam are strengthened remarkably......
, the predicted stress corrosion crack velocity is then vc = 0.8 μm/0.02 s = 4×10-5 m/s This estimation shows that the DHC model may be developed to predict a TGSCC crack velocity sufficiently high... steady state stress corrosion crack propagation of Mg in aqueous solutions, a high dynamic hydrogen concentration would be expected to build up just behind the crack tip. This may be a feature of all......
J. Cent. South Univ. (2020) 27: 3149-3162 DOI: https://doi.org/10.1007/s11771-020-4535-3 Stress initialization methods for dynamic numerical simulation of rock mass with high in-situ stress YANG... for the dynamic response simulation of rock mass in a high in-situ stress field. In this paper, stress initialization methods, including their principles and operating procedures for reproducing steady......
, the sulfur isotope composition is characterized by the high negative value, which is different from the Dafulou tin-polymetallic deposit. The difference of the enrichment and fractionation of the sulfur...Geology and sulfur isotope geochemistry of Dafulou tin-polymetallic deposit in Dachang orefield, Guangxi, ChinaCHENG Yong-sheng(成永生)1, 2, 3(1. Key Laboratory of Metallogenic Prediction of Nonferrous......
batholith and host rock. Only in the open space caused by structural stress (convex locations), lenticular or pocket-shaped and high-graded orebodies were formed (Fig. 2). The mineralization.... It is the major mineralization period of Hejiangkou deposit and can be subdivided into four mineralization stages, namely the skarn stage, oxide stage, high-temperature sulfide stage and low-temperature......
response. Based on the results of soil-rock meso-statistics using digital imaging, a simulated annealing algorithm is adopted to expand the meso-structural features of deposit bodies in 3D... that with a combination of the simulated annealing algorithm and the statistical feature functions, the randomness and heterogeneity of the rock distribution in the 3D inner structure of deposit body medium can......
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