Results 11 to 20 of about 35,277 (264)

Canaries in the coal mine [PDF]

European Respiratory Journal, 2013
Up until 30 years ago, coalminers relied on canaries as warning systems against harmful gases and pollutants underground. The miners listened for birdsong and if the birds fell silent, then they knew there was danger to their health and to take action. Today we have much more sophisticated information and reporting on the quality of air.
openaire   +2 more sources

Analysis on Spatial Disturbance Influence of Surrounding Rock Stress in the Staggered Roadways and Its Control Countermeasures

Shock and Vibration, 2022
Combined with specific engineering examples, the spatial disturbance influence characteristics and laws of the surrounding rock stress in the staggered roadways are analyzed by numerical simulation.
Qingwei Bu, Benqing Yuan, Meng Ye, Nuo Xu   +3 more
doaj   +1 more source

Application of the Ultimate Hanging Arch Length of the Layered Roof with Anchors and the Gob-Side Entry Retaining

Shock and Vibration, 2021
The gob-side entry retaining plays an important role in improving working face ventilation, alleviating working face connection, and increasing mining revenue.
Peng Li, Xigui Zheng, Xiaowei Guo, Boyang Li, Cong Wang   +4 more
doaj   +1 more source

Effect of Moisture on the Macro Failure Characteristics of Weakly Consolidated Mudstone: Mesomechanism

Geofluids, 2022
Mudstone, whose significant characteristic is water-weakening, widely exists in all kinds of geotechnical engineering, which brings great security risks to engineering safety.
Jiahui Xu, Guichen Li, Haoyu Rong, Mohamed Elgharib Gomah, Changlun Sun, Jinghua Li, Suhui Zhang   +6 more
doaj   +1 more source

Mechanical Analysis of the Failure Characteristics of Stope Floor Induced by Mining and Confined Aquifer

Shock and Vibration, 2021
Mining above confined aquifer has become an important task for water inrush prevention in China. To study the failure characteristics of stope floor along the strike, a mechanical model under combined action of mining and confined aquifer was constructed,
Zhiguo Lu, Wenjun Ju, Xiwen Yin, Zhuoyue Sun, Fengda Zhang, Chujian Han   +5 more
doaj   +1 more source

Study on working resistance distribution of support and resistance increasing characteristics of support partition in longwall face with ultra-large length

Meitan kexue jishu, 2023
The effect of the increase of inclined length of fully mechanized mining face on roof breaking and stress evolution is complex, which leads to regional differences in the support characteristics of support in mining face.
Xingyu LIN, Gang XU, Xiaojin GAO, Zhen ZHANG, Qianjin LIU   +4 more
doaj   +1 more source

Characteristics and mechanism of strong dynamic load mine pressure in large mining height full-mechanized caving face with multiple thick and hard roof

Meitan xuebao
In view of the problems of strong mine pressure such as rapid shrinkage of hydraulic support column and easy support crushing in working face under the fully mechanized caving face with large mining height in multi-layer thick and hard roof of extra ...
Zhen ZHANG, Zhizeng HUANG, GANG XU, Xiaogang LIU, Qianjin LIU, Tielin ZHAO, Xingyu LIN   +6 more
doaj   +1 more source

In Situ Testing of Rock Burst Damage to Roadway Wall Rock and Support System

Shock and Vibration
Rock burst hazards are a common occurrence during deep coal mining, resulting in the collapse of roadway wall rock and the failure of support structures.
Yukai Fu, Sifeng He, Penghe Zhou, Jiankang Jiao, Junchen Li, Zhuoyue Sun, Jie He   +6 more
doaj   +1 more source

Photographs of the Interior of a Coal-Mine [PDF]

Science, 1884
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openaire   +2 more sources

Furfuryl Alcohol‐Driven Proton Supply Enables Efficient Photocatalytic H2O2 Production Beyond Water‐Based Systems

Advanced Science, EarlyView.
A ZnIn2S4–carbon dot heterojunction enables photocatalytic H2O2 production coupled with furfuryl alcohol oxidation. In this redox system, furfuryl alcohol acts as both the electron donor and oxidation substrate, producing furoic acid with 100% selectivity and 98% conversion while supporting efficient H2O2 generation with a solar‐to‐chemical conversion (
Pengfei Bai, Ning Li, Quan Zhou, Bin Liu, Xiangqian Fan, Lei Liu, Jingkai Lin, Weijie Ren, Shengliang Hu, Huayang Zhang   +9 more
wiley   +1 more source