Results 21 to 30 of about 257 (165)
ZDY2-300LM Full Hydraulic Drilling Rig with Double Working Arms
Meikuang Anquan, 2020 Aiming at the rapid and precise construction requirements for a large number of directional pre-borehole of roof cutting and pressure relief in coal mines, ZDY2-300LM full hydraulic drilling rig with double working arms is developed by means of variable
SHAO Junjie, ZHANG Ning
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Energy Reports, 2020 To maintain the high-efficiency production of fully mechanized working face under the condition of highly mechanized mining and guarantee the security operations during mining process at high gassy outburst-prone mines, in most cases, the gas control ...
Hong Li +6 more
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Applied Sciences, 2023 Measurement while drilling (MWD) data reflect the drilling rig–rock mass interaction; they are crucial for accurately classifying the rock mass ahead of the tunnel face.
Xu Cheng +4 more
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工程科学学报, 2022 Horizontal directional drilling (HDD) technology is widely used in the construction and maintenance of municipal lifeline projects, the laying of long-distance oil and gas pipelines, and directional survey of mountains.
Ping-he SUN +4 more
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Engineering Strategies for Stable and Long‐Life Alkaline Zinc‐Based Flow Batteries
Advanced Functional Materials, EarlyView.Alkaline zinc‐based flow batteries face persistent challenges from unstable zinc deposition, including dendrite growth, passivation, corrosion, and hydrogen evolution, which severely limit cycling stability. Current research addresses these issues through coordinated electrode structuring, electrolyte regulation, and membrane design to control zinc ...
Yuran Bai +6 more
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Research on gas drainage technology and equipment of high-level directional drilling in coal mine [PDF]
E3S Web of ConferencesThe gas overrun at the upper corners of the goaf and return air lanes has been restricting the development of China's coal mining industry. To solve the problem of over-limit gas concentration at the upper corners, the fundamental reason is to reduce the
Song Yubo
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Measurement method of borehole wall resistivity for coal mine gas extraction
Gong-kuang zidonghua, 2022 For borehole wall state detection of horizontal directional kilometer drilling rig used for coal mine gas extraction, it is considered through analysis that the commonly used logging technologies such as gamma ray method and ultrasonic method are ...
LI Jie +5 more
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Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics
Advanced Materials, EarlyView.The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades +7 more
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Azaporphyrinoid‐Based Photo‐ and Electroactive Architectures for Advanced Functional Materials
Advanced Materials, EarlyView.A long‐standing collaboration between the Torres and Guldi groups has yielded diverse azaporphyrinoid‐based donor‐acceptor nanohybrids with promising applications in solar energy conversion. This conspectus highlights key molecular platforms and structure‐function relationships that govern light and charge management, supporting the rational design of ...
Jorge Labella +3 more
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Design of Double Motor Power Head of High Power Deep Hole Directional Drilling Rig
Meikuang Anquan, 2020 To meet the demand of power head for high power deep hole directional equipment, the double motor power head was developed by combining theory with field test.
ZHANG Rui
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