Results 121 to 130 of about 2,137,122 (310)

Research and application on in-situ enhancement mechanism of coal-slurry interface in grouting modification of coal roadway

Meitan xuebao
Grouting modification is an effective means for reinforcing fractured coal roadways, with the regulation of the coal-slurry interface being the core of grouting modification.
Jiafeng LI, Hongpu KANG, Jianwei YANG, Xiaodong SUN, Yanjun FENG, Pengfei JIANG, Tao WANG   +6 more
doaj   +1 more source

Coal operator mining facts - 2002 [PDF]

"In 2002, a total of 2,065 coal mining operations reported employment to the Mine Safety and Health Administration (MSHA). Coal mines comprised 14.2% of all mining operations. A total of 74,559 employees, corresponding to 78,601 full-time equivalent (FTE)

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Internal Carbon Cycles in the Steel Industry: Pathways for CO2 Management and Carbon Capture Utilization

Chemie Ingenieur Technik, EarlyView.
The steel industry accounts for about 7%‐9% of global CO2 emissions. While H2‐based direct reduction is a long‐term route, near‐term solutions are needed for existing plants. Internal carbon cycles reuse steelworks off‐gases and by‐products, enabling circular carbon use and supporting CCU integration.
Florian Haakmann, Nina Kolbe, Julian Suer, Cássia Castro Müller, Nils Jäger   +4 more
wiley   +1 more source

Optimal selection test of material ratio in the top of Ordovician limestone grouting reconstruction

Meitan kexue jishu
It is an effective method to reduce the risk of floor water inrush by grouting reconstruction and sealing of water channel on top of Ordovician limestone before deep confined water mining in Huabei type coal mine in China. The basic properties of fly-ash
Zhenli FAN, Lutong CAO, Fengda ZHANG, Xiwen YIN, Qiuyang ZHAO, Zhiwei ZHANG   +5 more
doaj   +1 more source

Coal operator mining facts - 2004 [PDF]

"In 2004, a total of 2,011 coal mining operations reported employment to the Mine Safety and Health Administration (MSHA). Coal mines comprised 13.9% of all mining operations.

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Application of artificial neural network and general machine learning modelling on CO2 adsorption in moisture equilibrated South African high and medium rank coals

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract This study investigates the effect of moisture on CO2 adsorption in South African coals using both experimental and machine learning approaches. Three coal samples (SL, TN, and EM) with varying ranks (RoVmr: 3.49%, 1.26%, and 0.64%, respectively) were collected from different regions of South Africa.
Kasturie Premlall, Lawrence Koech, Douw Faurie, Khanyisile Lepota   +3 more
wiley   +1 more source

Dynamic tensile mechanical properties and energy dissipation characteristics of sandstone with varying degrees of initial damage

Scientific Reports
To elucidate the influence of pre-existing damage on the dynamic tensile behavior and energy dissipation mechanisms of sandstone, cyclic loading–unloading followed by dynamic Brazilian splitting tests were conducted using a split Hopkinson pressure bar ...
Wenbao Shi, Haoran Shi, Chuanming Li, Chao Qi, Jucai Chang, Aoyun Yan, Feiyang Ren   +6 more
doaj   +1 more source

Coal operator mining facts - 2008 [PDF]

"Mining Operations: In 2008, a total of 2,129 coal mining operations reported employment to the Mine Safety and Health Administration (MSHA). Coal mines comprised 14.3% of all mining operations. 1.

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One hundred years of teaching, research, and innovation in chemical engineering at the Faculty of Chemistry, National Autonomous University of Mexico (UNAM): Birthplace and enduring leadership of the discipline in Mexico

The Canadian Journal of Chemical Engineering, EarlyView.
The teaching of chemical engineering in Mexico started in 1925 at the Faculty of Chemistry (FQ) of the National Autonomous University of Mexico (UNAM). Academic institutions, research centres, chemical companies, technological developments, highly trained personnel, and scientific contributions are part of the legacy from FQ‐UNAM.
Patricia Pérez‐Salinas, Alberto Rosas‐Aburto, Martín G. Hernández‐Luna, Aida Gutiérrez‐Alejandre, Eduardo Vivaldo‐Lima   +4 more
wiley   +1 more source

Navigation and control of continuous mining systems for coal mining. [PDF]

"The primary focus of the U.S. Bureau of Mines (USBM) is to make mining safer and more healthful for mine workers. The USBM research program is developing technology that will allow computer-assisted operation of mechanized equipment normally used in ...

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