Results 51 to 60 of about 1,100 (178)

Engineering Biochar‐Derived Functional Materials for High‐Performance Supercapacitors: Design Principles, Mechanisms, and Scalable Strategies

Carbon Energy, EarlyView.
ABSTRACT Biochar has emerged as a useful and adaptable source of carbon for supercapacitor electrodes. Its value comes from the way biomass chemistry, thermal conversion, and activation conditions shape the resulting pore network, surface groups, and degree of carbon ordering.
Soumen Mandal, Avinash C. Mendhe, Mayna Roy, Neha S. Barse, Taejoon Park, Han‐Seung Lee, Haigun Lee   +6 more
wiley   +1 more source

Overlying Rock Activity Laws and Influential Ranges of Coal Seam Mining in Stubble Areas

Geofluids, 2022
This report applies theoretical analysis, similar material simulations, and numerical simulation methods to study the overburden strata movements and influential range of coal mining under pressure stubble conditions and to elucidate the relationship ...
Baoxin Jia, Hao Chen, Zhiyong Li, Zhi Tang   +3 more
doaj   +1 more source

Comprehensive prevention and control technology of coal spontaneous combustion in compound goaf of close distance coal seam

Gong-kuang zidonghua, 2021
In China, the occurrence of close distance coal seams accounts for a large proportion, and multiple goaf areas are easily connected to form compound goaf during mining. The compound goaf area is large. There are many air leakage areas and wide distribution range of residual coal, leading to the extremely serious coal spontaneous combustion disaster in ...
QIN Botao1,2, GAO Yuan1,2, SHI Quanlin1,2, SHI Guoqing1,2   +3 more
openaire   +1 more source

Stability control of gob-side entry retained under the gob with close distance coal seams

International Journal of Mining Science and Technology, 2021
In multi-seam mining, the interlayer rock strata between the upper coal seam (UCS) and the lower coal seam (LCS) appear damage and strength weakening after mining the UCS. Ground stability control of the gob-side entry retaining (GER) under the gob with close distance coal seams (CDCS) is faced with difficulties due to little attention to GER under ...
Zizheng Zhang, Min Deng, Jianbiao Bai, Shuai Yan, Xianyang Yu   +4 more
openaire   +2 more sources

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

Layout study of bottom drainage roadway in deep mining of very close adjacent coal seam group

Meikuang Anquan
Based on the engineering background of the ultra-close adjacent coal seam group in the deep part of Pingdingshan No.8 coal mine, this paper studies the reasonable layering of bottom pumping roadway under the mining condition of deep ultra-close seam ...
Minggong GUO, Yanhe LI, Dazhao SONG, Gang YANG, Liming QIU, Cheng YANG   +5 more
doaj   +1 more source

Slip versus dilation tendency parameter space as a tool for prospecting structurally controlled geothermal systems in greenfield: insights from the greater Ruhr region

Deep Underground Science and Engineering, EarlyView.
This study highlights that with the static and time‐dependent evolution of slip versus dilation tendency parameter space, structurally controlled deep geothermal systems can be selected within areas of higher permeability and lower seismic hazard. Abstract Faults play a vital role in the Earth's hydraulic system by facilitating fluid flow when dilating
Michal Kruszewski, Alessandro Verdecchia, Oliver Heidbach, Rebecca M. Harrington, David Healy   +4 more
wiley   +1 more source

Attenuation law of concentrated stress under coal pillar of close coal seams and its application

Scientific Reports, 2022
When mining the multiple coal seams in close proximity, the coal pillar left in the goaf causes stress concentration in the floor. The layout of mining roadway in lower short distance coal seam is affected by the propagation of concentrated stress caused
Qingtao Kang, Fulian He, Shuaifeng Yin, Yang Yang   +3 more
doaj   +1 more source

Real‐time lithology identification while drilling based on drill cuttings image analysis with ensemble learning

Deep Underground Science and Engineering, EarlyView.
A lithology identification while drilling method was developed, integrating an automated cuttings sampling system, a smart drilling rig, and an ensemble learning model. Underground trials achieved 97.42% accuracy in real‐time identification of cuttings lithology and composition, enhancing hazard management and supporting unmanned drilling technology in
Kun Li, Ting Ren, Ningping Yao, Jon Roberts, Haitao Song, Zhongbei Li, Xueqiu He, Liang Zhao   +7 more
wiley   +1 more source

Catastrophe Mechanism of Stress-Fissure Coupling Field in Mining Close Distance Seams in Southwest China

Geofluids, 2021
For the sake of studying the catastrophe mechanism of stress-fissure coupling field in mining close distance seams in southwest China, a test working face in Guizhou province in southwest China is adopted and researched by the methods of numerical ...
Suo Jie, Li Zhen-hua, Huang Cun-han, Cao Zheng-zheng, Xu You-lin, Chen Zu-guo   +5 more
doaj   +1 more source