Results 61 to 70 of about 1,364 (186)

Research and application of roadway roof or floor coal thickness detection technology based on coal-rock interface wavefield characteristics

Meitan kexue jishu
Coal seam thickness is a key controlling factor for coal mine production and safety，as well as a core parameter for the construction of smart mines. Traditional detection methods have achieved some success in medium- and thin-seam coal mines; however, in
Yanghao PENG, Zhenjie PENG, Li HAI, Yajun WANG, Wei HAN   +4 more
doaj   +1 more source

Engineered Carbon Dots as Multifunctional Nanoplatforms for Next‐Generation High‐Performance Advanced Batteries

Carbon Energy, EarlyView.
Herein, we mainly summarize the characteristics of the main types of carbon dots (CDs), analyze the strategies for improving advanced batteries' performance via incorporating CDs, comprehensively summarize recent applications of CDs in the main components (electrode, electrolyte, and separator) of advanced batteries, and propose the technical ...
Chuang Jiang, Jinlong Feng, Zhenjie Liu, Ming Jia, Qingxi Hou, Wei Liu   +5 more
wiley   +1 more source

Study on burst risk assessment of coal seam in folded area based on pre-mining stress back analysis

Meitan kexue jishu, 2023
In order to scientifically evaluate the impact risk of steeply inclined extra-thick coal seam in folded area and provide theoretical guidance for the prevention and control of rock burst, a numerical model including folds is established in this paper ...
Junsong XU, Pengzhi PAN, Jianqiang CHEN, Shankun ZHAO, Zhenhua WU, Xudong LIU   +5 more
doaj   +1 more source

Gas Distribution Law for the Fully Mechanized Top‐Coal Caving Face in a Gassy Extra‐Thick Coal Seam

Advances in Civil Engineering, 2018
Mine gas overflow is a serious threat to the safe and efficient longwall mining of gassy coal seams. Based on the field mining conditions and gas extraction of the fully mechanized top‐coal caving face of a gassy coal mine, the space volume fraction distribution and emission (extraction rate) of gas in the face were tested by an arrangement of ...
Wenlin Wang, Fangtian Wang, Bin Zhao, Gang Li   +3 more
openaire   +2 more sources

Mechanism and disaster control new technology of strong ground pressure manifestation in ultra‐large mining face

Deep Underground Science and Engineering, EarlyView.
In response to the problem of strong mining pressure manifestation along the goaf roadway in a thick coal seam mining area, this study uses a new type of combined blasting roof cutting technology to effectively control the manifestation and deformation of mining pressure along the goaf roadway.
Xiaoding Xu, Manchao He, Jun Yang, Yubing Gao, Qiang Fu, Qing Ma, Yajun Wang   +6 more
wiley   +1 more source

Key technologies for extraction and identification of gas target area for pressure relief in inclined thick coal seam [PDF]

, 2023
In order to study the dip angle effect on the evolution law of the target area for pressure relief gas drainage in inclined thick coal seams, the physical similarity simulation test and theoretical analysis were combined to study the fracture evolution ...
Shugang LI, Lidong LIU, Risheng ZHUO, Pengxiang ZHAO, Haifei LIN   +4 more
core   +1 more source

Performance assessment of a potential underground thermal storage facility: Case study of the closed mine Prosper‐Haniel in the Ruhr coal mining area in Germany

Deep Underground Science and Engineering, EarlyView.
This study demonstrates the feasibility of an underground closed‐loop thermal storage facility at a post‐mining site, intended for seasonal heat energy storage. Its principal design shows water flow directions in winter and summer (1, 2), heat pumps (3), an upper water reservoir (4), and connecting pipes (5).
Dmytro Rudakov, Oleksandr Inkin
wiley   +1 more source

Lithium Metal Anode Fabrication: Methods, Challenges, and Strategies

EcoEnergy, EarlyView.
Schematic illustration of four representative fabrication techniques for thin lithium metal anodes: extrusion, molten lithium infusion, electroplating, and physical vapor deposition (PVD). ABSTRACT The pursuit of ultra‐high energy‐dense lithium‐metal batteries (LMBs) has reignited the drive to fabricate ultrathin high‐quality lithium metal anodes. This
Ji Hyun Baek, Mi Ji Kang, Ho Won Jang
wiley   +1 more source

Research on the application of stage fracturing technology of L-shaped horizontal well in extra-thick coal seam

, 2023
In the process of extra-thick coal seam mining, the strength of hard roof above the coal seam is high, the breaking step distance is large, and it is difficult to collapse, especially the mining disturbance range is wide, and the rock strata of large ...
MEN Hong, ZHAO Huaquan, DOU Guidong, JIA Zenglin, GAO Yonggang, YAN Bin, XIE Fei, WU Liang
core   +1 more source

Analysis of Surrounding Rock Control Technology and Its Application on a Dynamic Pressure Roadway in a Thick Coal Seam

Energies, 2022
The deformation control of roadways surrounded by rock in the fully mechanized amplification sections of extra-thick coal seams is problematic. To analyze the failure and failure characteristics of a support frame, as well as the deformation and failure ...
Jian Hao, Anfa Chen, Xuelong Li, Hua Bian, Guanghua Zhou, Zhenguo Wu, Linjun Peng, Jianquan Tang   +7 more
doaj   +1 more source