Results 61 to 70 of about 23,758 (276)

Thermal Degradation of PFAS in Different Scales: Measurement of Hydrogen Fluoride (HF)

Chemie Ingenieur Technik, EarlyView.
The communication article is about the challenges to balance a combustor in the case of fluorine when incinerating PFAS containing materials. Several analytical methods are compared: for continuous measurement, FTIR with TDLS. The detected fluorine species are further compared with results upon IC and pyrohydrolysis for discontinuous measurements in ...
Hans‐Joachim Gehrmann, Vanessa Nuredin, Krasimir Aleksandrov, Steffen Tonndorf, Manuela Hauser, Björn Meermann, Dieter Stapf   +6 more
wiley   +1 more source

A review of water-based suppressants for coal dust suppression

International Journal of Coal Science & Technology
The large amount of harmful particles in coal dust not only pollutes the production environment, affects the production efficiency and resource utilization of enterprises, but also poses a risk to human health.
Fangwei Han, Mei Liu, Fuhong Hu, Guirui Niu, Diandian Xue, Yue Zhao, Shengyong Hu, Hetang Wang   +7 more
doaj   +1 more source

Concentration Distribution and Physicochemical Properties of 10 nm–10 μm Coal Dust Generated by Drum Cutting Different Rank Coals: A Physical Simulation Experiment

Atmosphere
Shearer drum cutting of coal seams generates over half of the coal dust in coal mines, while relevant studies focus more on micron-sized dust and much less on nano- to sub-micron-sized coal dust.
Hui Liu, Rong Jia, Jintuo Zhu, Liang Wang, Jiamu Tong, Yu Liu, Qingyang Tian, Wenbo Liu, Caixia An, Nkansah Benjamin Oduro   +9 more
doaj   +1 more source

Evaluation of the 20 L dust explosibility testing chamber and comparison to a modified 38 L vessel for underground coal

International Journal of Mining Science and Technology, 2018
The phenomenon of combustible dust explosions is present within many industries. Tests for explosibility of dust clouds per ASTM E1226 use a 20 L explosive chamber that places the combustible dust directly below the dispersion nozzle which generates a ...
Robert Eades, Kyle Perry, Catherine Johnson, Jacob Miller   +3 more
doaj   +1 more source

Preparation and Properties of a Novel Coal Dust Inhibitor with Cross-linked Network Structure

, 2020
In order to solve the problem of coal dust pollution caused by open-pit coal mines, polyvinyl alcohol/sodium alginate/sodium metaphosphate dust suppressant with cross-linked network structure was prepared, and the dosage, proportion and dust suppression ...
HUANG Xueman, DING Guanghui, ZHANG Qian, LU Wei
core   +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

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

Seismic analysis and design of tunnels within fault ground: A review

Deep Underground Science and Engineering, EarlyView.
The research methods of seismic response of tunnels within fault ground, including field investigations, analytical solutions, physical experiments, and numerical simulations, and seismic countermeasures are discussed. The present study examines the shortcomings and limitations of the current research and design, and puts forward proposals for future ...
Xingda Wang, Yujing Jiang, Xuepeng Zhang, Yuyong Jiao, Ningbo Li, Xiao Wang, Bo Li   +6 more
wiley   +1 more source

Study on airflow-coal dust dispersion pattern and control technology in fully mechanized mining face

Gong-kuang zidonghua
The shearer in a fully mechanized mining face generates significant turbulent airflow during coal cutting, resulting in changes in airflow velocity in the mining area and causing the lateral dispersion of coal dust particles toward pavements.
GAO Cheng, LIU Liren, ZHENG Lei, LYU Mingjie   +3 more
doaj   +1 more source

Research on the influence of temperature on water evaporation characteristics in coal dust

, 2022
In order to explore the influence of high temperature in deep well on coal dust moisture evaporation characteristics, evaporation tests were conducted with four coal dust samples in the temperature of 25 ℃, 30 ℃, 35 ℃, 40 ℃, 45℃ and 50 ℃, respectively ...
YANG Yuzhong, LI Lan
core   +1 more source