Results 11 to 20 of about 10,814 (211)
Automatic Determination of Rock-Breaking Target Poses for Impact Hammers
Energies, 2022 This paper describes a system for the automatic determination of rock-breaking target poses for impact hammers used in underground mines. The rock-breaking target pose is defined as the position and angle at which the impact hammer must strike a rock in ...
Daniel Cárdenas +3 more
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工程科学与技术, 2022 To solve the problems of low penetration, serious wear and low rock-breaking efficiency during traditional disc cutter rock breaking under the geological conditions of hard rock, many new auxiliary rock breaking methods have been proposed, such as ...
Lu GUO +4 more
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Yantu gongcheng xuebaoThis study addresses the issues of severe wear and low rock-breaking efficiency of shaft sinking by drilling methods in the Jurassic strata of Western China, focusing on milled-tooth roller cutter commonly used in this drilling method.
CHENG Hua 1, 2, WANG Xiaoyun 1, YAO Zhishu 1, ZHU Jian 3, RONG Chuanxin 1, FU Xinpeng 4
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Experimental Study on Granite Broken by PDC Bit under High Temperature and High Pressure
Shiyou jixie, 2021 As the exploration and development of oil and gas gradually advance to the deep layer, the formation temperature and pressure keep increasing. The efficiency of PDC bit breaking deep hard rock under high temperature and high pressure is reduced, and the ...
Shi Huaizhong +5 more
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Progress and trends in non-tool rock breaking theory and technology
Meitan xuebaoWith the gradual implementation of China’s deep-earth engineering strategy, deep resource extraction and underground space construction have brought in some new opportunities, but they also face many challenges, with extreme geological conditions such as
Jianping WEI +6 more
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Influence of PDC Cutter Diameter on Cutting Force
Shiyou jixie, 2023 PDC bit design needs to be customized depending upon the formation lithology characteristics, and especially the diameter of PDC cutter is an important parameter in bit design optimization.A series of laboratory simulation tests were conducted to explore
Wei Jiusen +4 more
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Equivalent experimental study on rock breaking of SC-CO2 and industrial emulsion explosive
工程科学学报Supercritical (SC)-CO2 rock breaking technology offers a safe alternative to industrial explosive blasting. Quantitatively calculating the rock breaking efficiency of SC-CO2 is crucial for comparing its engineering application and economic benefits ...
Nan JIANG +3 more
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Applied Sciences, 2019 The low rock breaking efficiency of conventional polycrystalline diamond compact (PDC) bits in hard abrasive formations prompts the development of PDC cutting elements from the planar structure to the non-planar structure.
Jianxun Liu +4 more
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Shiyou jixie, 2021 The research on rock breaking mechanism of special-shaped non-planar PDC cutter is relatively scarce, and the research on domestic prismatic PDC cutter is even scarcer.
Wei Xiuyan +5 more
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Using a high-pressure water jet-assisted tunnel boring machine to break rock
Advances in Mechanical Engineering, 2020 The concept of tunnel boring machine (TBM) disc cutter rock breaking coupled with high-pressure water jets has been proposed to overcome the difficulties that occur when TBMs encounter extremely hard rocks.
Jinliang Zhang +5 more
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