Results 11 to 20 of about 1,028,807 (230)
Downtown Partnership Board/Annual Meetings/Top of the Rock Award
, 2023 This file contains a photograph of Jack Turner and Rick Beard at the Downtown Little Rock Partnership annual meeting.This project was supported in part by a Humanities Collections and Reference Resources Implementation Grant from the National Endowment ...
The Downtown Little Rock Partnership
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Geofluids, 2023 The rock chip information (shape, size, and particle size distribution) could comprehensively reflect the characteristics of rock mass and rock-breaking efficiency of TBM.
Chuigang Zeng +5 more
doaj +2 more sources
Investigation of a hydraulic impact: a technology in rock breaking [PDF]
, 2008 International audienceThe finite element method and dimensional analysis have been applied in the present paper to study a hydraulic impact, which is utilized in a non-explosive rock breaking technology in mining industry.
Wenyi Yan +5 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
doaj
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
doaj
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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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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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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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
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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