Results 31 to 40 of about 4,694,239 (258)

Technology and application of dynamic pressure gas secondary drainage through borehole in bottom drainage roadway of high gas outburst coal seam

Meikuang Anquan, 2022
In order to solve the problem of gas overrun and low utilization rate caused by mining pressure relief gas pouring into mining working space in high gas outburst coal seam, this paper used numerical simulation and field application methods to study the ...
LI Yanhe, ZHAI Cheng, DING Xiong
doaj   +1 more source

Rationale of the quantity of soil-cutting stars and working body of soil rotary knives [PDF]

E3S Web of Conferences, 2021
This article considers the main parameters of the experimental rotary working body (RWB) used for tillage and opening of buried vines in the protection zone between rows, soil loosening and weeding blades in the protection zone of the crop protection ...
Obidov Abdulkhay, Turakulov Mamaraym, Ermatov Valijon, Yusufaliev Abdurakhmon   +3 more
doaj   +1 more source

What happened to surgical emergencies in the era of COVID-19 outbreak? Considerations of surgeons working in an Italian COVID-19 red zone

Updates in Surgery, 2020
The world healthcare community is facing coronavirus disease (COVID-19) outbreak caused by SARS-CoV-2 that is progressively spreading to several countries.
A. Patriti, E. Eugeni, F. Guerra
semanticscholar   +1 more source

Analysis of Mechanical Characteristics and Instability Law of Inverse Fault under the Influence of Mining

Earth Sciences Research Journal, 2018
In order to explore the mechanical characteristics and stability of the reverse fault under the influence of mining, an inverse mechanics model has been built under work face mining conditions, according to the law of working surface pressure ...
Yuanhui Li, Rui Zhou
doaj   +1 more source

Zoning Control Technology of Gob-Side Roadway Driving with Small Coal Pillar Facing Mining in a Special Isolated Island Working Face: A Case Study

Applied Sciences, 2021
The gob-side roadway in an isolated island working face is a typical representative of a strong mining roadway, which seriously restricts the efficient and safe production of underground coal mines.
Changliang Han, Houqiang Yang, Nong Zhang, Rijian Deng, Yuxin Guo   +4 more
doaj   +1 more source

Study on development law of water conducting fracture zone in coal seam mining under burnt rock aquifer

Meikuang Anquan, 2022
In order to study the development law of water conducting fracture zone in coal seam mining in A’ai Mining Area, Xinjiang, 1013 working face of a coal mine is selected as the research object.
ZHANG Jingmin, MENG Fanlin, WU Haiwen, ZHAO Fei, XUE Jiankun, WANG Yi, LUO Ankun, HUANG Huan   +7 more
doaj   +1 more source

The working zone in the interpolar area of the Faraday balance: an approach to testing the magnetic force factor stability criterion

, 2017
Due to rapid development of the scientific and applied research in magnetic control and magnetophoresis of ferro- and ferromagnetic disperse fraction of various technological, natural and industry-specific media, the Faraday method is again in high ...
A. Sandulyak, A. Sandulyak, M. Polismakova, D. Kiselev, D. Sandulyak, V. Ershova   +5 more
semanticscholar   +1 more source

Establishing an Apheresis Medicine Program in a Resource‐Constrained Setting: A 5‐Year Experience From Lagos, Nigeria

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Establishing a comprehensive apheresis medicine program in a resource‐constrained setting presents significant structural, financial, and logistical challenges. Despite the growing clinical importance of apheresis services globally, published experience from sub‐Saharan Africa remains sparse.
Folasade Adelekan‐Popoola, Shakirat Gold‐Olufadi, Olufunto Olufela Kalejaiye, Abdullateef Ogala, Rasheed A. Balogun   +4 more
wiley   +1 more source

Research on the "two-zone" heights of soft stratum working face with slicing full-mechanized caving mining

矿业科学学报, 2019
Water and sand inrush is one of the principal factors that restrict safe and effective production of mining under water body.The threat to soft strata mines with extremely thick coal seam is especially more serious.Caving zone and fissure zone(joint name
Zhang Bin, Xu Yanchun, Li Jianghua, Xiong Bin   +3 more
doaj   +1 more source

Study of Deformations Field in the Working Zone of Vertical Milling Machine

, 2017
The paper examines the questions of the static elastic deformation development during the machining with milling machines. It discusses the issues of “machine – tool – instrument – workpiece”system modelling aiming at providing the preliminary assessment
R. Khusainov, A. Sabirov, I. I. Mubarakshin   +2 more
semanticscholar   +1 more source