Results 81 to 90 of about 335,851 (308)

Coal-rock interface detector [PDF]

, 1979
A coal-rock interface detector is presented which employs a radioactive source and radiation sensor. The source and sensor are separately and independently suspended and positioned against a mine surface of hydraulic pistons, which are biased from an air
Crouch, C. E., Jones, E. W., Rose, S. D.
core   +1 more source

When coal leaves Texas [PDF]

, 2018
The recent closure of a lignite mine outside Elgin, Texas, and its related coal plant offers an insight into how the state’s electric grid — and its rural communities — may react to a coming age of Texas green energy ...
Lewis, Kaulie Janae
core   +1 more source

Safety of Sodium‐Ion Batteries: Evaluation and Perspective from Component Materials to Cells, Modules, and Packs

Advanced Energy Materials, EarlyView.
This review provides a bottom‐up evaluation of sodium‐ion battery safety, linking material degradation mechanisms, cell engineering parameters, and module/pack assembly. It emphasizes that understanding intrinsic material stability and establishing coordinated engineering control across hierarchical levels are vital for preventing degradation coupling ...
Won‐Gwang Lim, Seoa Kim, Erik A. Wu, Darren H. S. Tan, Shawn Peng, Xiaolin Li   +5 more
wiley   +1 more source

Surrounding rock control technology of gob-side entry retaining in deep high mining face

Meikuang Anquan
Under the influence of multiple mining influences, the mining pressure is more intense and the surrounding rock deformation is large, which is easy to cause the surrounding rock instability of gob-side entry retaining in fully mechanized mining face.
Junhu ZHANG, Zhenjiang CHEN, Xiancheng GAO, Lei ZHANG, Jianhua LI, Pengjiang DENG   +5 more
doaj   +1 more source

Calculation Method of Overburden Damage Height Based on Fracture Mechanics Analysis of Soft and Hard Rock Layers

Geofluids, 2019
Under the geological condition of soft and hard rock interaction stratum, the overburden damage height can provide a quantitative support for the design of the locations of gas drainage boreholes in the roof mining fracture zone and the determination of ...
Liang Chen, Shaowu Fan, Can Zhao, Lang Zhang, Zhiheng Cheng   +4 more
doaj   +1 more source

THE FOREST LAND RECLAMATION AFTER LIGNITE OPEN PIT MINING IN THE SOUTH OF UKRAINE [PDF]

, 2018
Lignite mining in Kropyvnytsky region has been performed in the last few decades in Alexandria district in the watershed of the two rivers (Ingulets and Beska). Semenovske - Golodkywske mine is the pit associated with
Kharytonov, Mykola, Masyuk, Oleksandr
core  

A Leaf‐Inspired Janus‐Structured Triboelectric‐Moisture Hybrid Energy Harvester

Advanced Energy Materials, EarlyView.
This study proposes a bioinspired Janus structured energy‐leaf with hybrid triboelectric‐moisture hybrid energy harvesters. This hybrid energy harvester is demonstrated in an intelligent emergency system for effective distress signaling and evacuation guiding during potential crises.
Liang Wei, Rui Gu, Yixuan Fu, Ziwei Huo, Chao Liu, Jiahong Yang, Siqi Sun, Yang Liu, Qijun Sun, Dong‐Hwan Kim, Zhong Lin Wang   +10 more
wiley   +1 more source

Optimized design and performance evaluation of long-pressure-short-extraction ventilation and dust removal system based on the Coanda effect

Frontiers in Artificial Intelligence
Mine ventilation and dust control systems are crucial for ensuring occupational safety and health during underground mining operations. Traditional long-pressure short-suction systems face challenges such as inefficient airflow organization, formation of
Xinguo Wang, Jinbo Zhao, Yufu Li, Zhibin Li   +3 more
doaj   +1 more source

Energy and precious fuels requirements of fuel alcohol production. Volume 4: Appendices G and H, methanol from coal [PDF]

Coal mine location, mining technology, energy consumption in mining, coal transport, and potential availability of coal are discussed.
Back, G., Reddy, T. S., Weinblatt, H.
core   +1 more source

Facts About Worker Safety and Health - 2012 [PDF]

, 2012
[Excerpt] This year marks the 41st anniversary of the Occupational Safety and Health Administration (OSHA) and the effective date of the Occupational Safety and Health Act.
AFL-CIO
core   +1 more source