Results 11 to 20 of about 159,153 (217)

DETERMINATION OF THE RATIONAL GEOMETRICAL PARAMETERS OF PLATE TYPE ELEMENTS OF MAGNETIC MATRIX OF THE POLYGRADIENT SEPARATOR

Electrical engineering & Electromechanics, 2018
Introduction. Polygradient magnetic separation has wide application in industry and in biomedicine. Working process in polygradient separators takes place in a matrix, magnetic elements of which create magnetic forces sufficient to remove small ferro ...
Juraj Gerlici, I. A. Shvedchikova, J. A. Romanchenko, I. V. Nikitchenko   +3 more
doaj   +1 more source

Research on spontaneous combustion 'three zones' in goaf of fully mechanized working face with large mining height

Gong-kuang zidonghua, 2019
In view of goaf spontaneous combustion prevention of 12401 fully mechanized working face with large mining height in Shangwan Coal Mine, CO is determined as prediction index gas of coal spontaneous combustion and C2H4 is used as auxiliary index gas to ...
QU Shijia, AN Shigang, WU Fusheng, LI Peng   +3 more
doaj   +1 more source

Calculation of Coalbed Methane Resources in Mining Stability Zone Based on Gas Emission

Meikuang Anquan, 2020
To calculate the coalbed methane resources in the stable area affected by coal mining, firstly, based on the height of roof caving zone and the water conducting fracture zone, the depth of floor failure zone, and the limit gas emission width of coal ...
LI Dan
doaj   +1 more source

The Change in the Shape Characteristics of the Plastic Zone in the Surrounding Rock of an Auxiliary Retracement Channel and a Reasonable Channel Spacing Determination Method

Applied Sciences, 2023
In underground coal mines, the stability of the retracement channel in the surrounding rock is crucial for the safe and efficient retracement of the equipment and to guarantee the continuity of the retracement work.
Xu Gao, Chenyi Liu, Hongkai Zhang, Kunlin Yang, Yingjie Hu, Xiaofei Guo   +5 more
doaj   +1 more source

Numerical simulation study on the evolution characteristics of the stress induced by mining in deep adjacent working faces

Geoenvironmental Disasters, 2023
Background The mining-induced stress in the surrounding rock after coal seam mining is the primary cause of damage and failure of the surrounding rock in the mining area.
Shoulong Ma, Mingwei Zhang, Lu Ma, Zhuangcai Tian, Xue Li, Zhenhao Su   +5 more
doaj   +1 more source

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

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

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