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The rock breaking capability analyses of sonic drilling [PDF]
Journal of Low Frequency Noise, Vibration and Active Control, 2021 Sonic drilling technology uses the longitudinal vibration of a drill string to realize fast and effective drilling. By setting the top and bottom boundary conditions of the drill string during drilling, a dynamic model of flexible sonic string percussive drilling is established in this article.
Yonghang Qian +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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SC-CO2 and emulsion explosives equivalence of rock-breaking effect in granite and mudstone sites
Journal of CO2 UtilizationHow to quantitatively account for the effect of SC-CO2 (Supercritical Carbon) rock-breaking in different rock sites is the key concern in the engineering application of non-explosive rock-breaking technology and economic comparison and there is a lack of
Nan Jiang +3 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
doaj
Improved Operating Performance of Mining Machine Picks [PDF]
, 2016 The reasons of low performance of mining machine picks are stated herein. In order to improve the wear resistance and the cutting ability of picks a new design of a cutting carbide tip insert to be fixed on a removable and rotating pick head is developed.
Kurzina, Irina Aleksandrovna +3 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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Planetary rock-breaking bodies and horizontal drilling
Proceedings of higher educational establishments. Geology and Exploration, 2023 Background. The article considers one of the variants of the original planetary drilling organ, in which used multiple impacts on the mass to be destroyed. This makes it possible to improve the methods of sinking inclined and horizontal wells by significantly reducing the required feed force and reducing the energy intensity of bottom hole ...
V. L. Skripka, L. H. Minyazeva
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What is an affordance and can it help us understand the use of ICT in education? [PDF]
, 2010 This paper revisits the concept of affordance and explores its contribution to an understanding of the use of ICT for teaching and learning. It looks at Gibson‟s original idea of affordance and at some of the difficulties long associated with the use of ...
Hammond, Michael
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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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Studies of new nonadhesive anchoring [PDF]
, 2018 Purpose is to develop anchoring with nonadhesive high-strength roof bolting in terms of large pre-destructive deformations and its testing under laboratory conditions. Methods.
Kurdiumow, D +3 more
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