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Investigating the factors influencing vertical stress ahead of the undercutting line in block caving [PDF]
Scientific ReportsIn block caving mines, stress evolution induced by undercutting poses a significant threat to the integrity of extraction structures. Focusing on the Pulang Copper Mine, this research analyzes the controlling factors behind the vertical stress ...
Yong Cao +4 more
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Influence of adjacent undercutting line positions on surrounding rock stability in block caving [PDF]
Scientific ReportsIn the block caving mining method, deformation and collapse can occur in roadways due to vertical stress concentration in front of the undercutting line.
Yong Cao, Xinzhu Hua, Heng Zhang
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Investigation of the slaking behavior of weak geological units in terms of undercutting rate
Bulletin of the Mineral Research and Exploration, 2022 It is aimed in this study to measure the undercutting rate of weak geological units under field conditions and to determine the relationship between this parameter and other indexes and physical properties of related rocks.
Semiha Özdemir, Zeynal Abiddin Ergüler
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Analysis of the characteristics and causes of ground fissures in Kenya rift region
Zhongguo dizhi zaihai yu fangzhi xuebao, 2021 The Kenya Rift valley is located in the middle section of the eastern branch of the Great Rift valley in East Africa. Modern tectonic movement and volcanic activity are intense, and it is a hotspot in current geological research.The rift zone has ...
Peng TAN +5 more
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Research on Safety Measures of Shallow-buried and Undercut Tunnel [PDF]
E3S Web of Conferences, 2021 The application of mine method shallow burying and undercutting method in subway and tunnel engineering is becoming more and more significant, but shallow burying and undercutting method also has its own limitations: the shallow burying and undercutting ...
Liu jian-Jun +3 more
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Undercutting analysis of recess action worm gear drives with double-depth teeth
Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2023 According to the theory of gearing, the mathematical model of a recess action (RA) worm gear with double-depth teeth has been developed in the previous study.
Wei-Liang CHEN, Chung-Biau TSAY
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Journal of Mechanical Engineering, 2022 A mathematical model of profile shifted quasi-involute arc-tooth-trace gears is obtained. The model includes functional relationships between the geometric-kinematic meshing characteristics and parameters of the generating surface as well as conditions ...
Tkach Pavlo +5 more
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Fabrication of SiO2-based microcantilevers by anisotropic chemical etching of (100) single crystal Si [PDF]
Journal of the Serbian Chemical Society, 2007 The undercutting process of thermal SiO2 microcantilevers with different orientations on (100) Si wafer was studied. The silicon substrate was removed by anisotropic chemical etching with a 25 wt. % aqueous solution of TMAH or a 30 wt.
VESNA JOVIC +3 more
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Yantu gongcheng xuebao, 2022 The capillary process is the main way of salinized deterioration effect and the important premise of aeolian ullage effect in undercutting areas at the bottom of earthen ruins in arid regions.
CUI Kai 1, 2, ZHAO Xiao-zheng 1, ZHU Ming-ji 1, CHEN Wen-wu 2, HAN Wen-feng 2
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Machines, 2023 One of the most difficult production geometry tasks arising in the machining process of the elements of a drive pair is to avoid undercuts. It is a serious technological challenge to determine the production of the elements of worm gear drives avoiding ...
Zsuzsa Balajti
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