Results 251 to 260 of about 277,436 (279)

Technological optimization of fully mechanized caving mining face with large mining heights

Journal of Coal Science and Engineering (China), 2013
Fully mechanized cave mining with large mining height is a new mining method, due to its large mining thickness and lower roadway excavation, the technology has been widely used in China’s thick seam mining. In order to improve the top-coal recovery ratio of fully mechanized cave mining with large mining height, a study was conducted on optimizing the ...
Lu-Jia Fan, Sheng-Li Yang
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Finite Element Analysis of Large Mining Height Hydraulic Support Top Beam

Applied Mechanics and Materials, 2015
In this paper, Solid works software and finite element analysis software ANSYS workbench combined for ZY10000/26/55 type two columns shield large mining height hydraulic support top beam finite element modeling, through the mathematical model analysis to determine the mechanical load, and then using ANSYS software to analyze the stress and displacement
Tie Li Ye, Jiao Peng
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Vibration Analysis of a Three-Drum Shearer for a Large Mining Height

Strength of Materials, 2020
A method of cutting coal with three drums was advanced, a three-drum shearer was designed, and the free mode and restrained model under prestress of the third drum were analyzed in large mining with ANSYS Workbench 14.0 to solve the damage problem of the cutting blade in a large mining face.
Q. Zhang, Y. Wang, B. Q. Li, Y. Tian
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Deformation characteristics and stability control of a gateroad in fully mechanized mining with large mining height

Arabian Journal of Geosciences, 2018
The gateroad cross-section is large, and the surrounding rock has a low strength in the fully mechanized coal mining face with a large mining height of 6.7 m. Moreover, under extremely high support pressure in the fully mechanized coal mining face, the gateroad deformation is usually considerable, and a series of accidents such as roof falling disaster
Hong-hu Yuan, Ren-liang Shan, Xue-gui Su
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Double-factor control method for calculating hydraulic support working resistance for longwall mining with large mining height

Arabian Journal of Geosciences, 2020
To control surrounding rock in longwall mining with large mining height, we consider the coal seam conditions in Jinjitan Coal Mine to analyze how roof failure and coal wall spalling affect the stress path. A simplified dynamics model of surrounding rock and hydraulic support is developed based on the mechanical model of roof stratum that involves the ...
Yihui Pang, Guofa Wang, Qiangling Yao
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Design of Debris Shield of Powered Support with 6.2M Large Mining Height

Applied Mechanics and Materials, 2010
One of the difficulties of the world’s mining industry is how to ensure safe and reliable work of the powered support with large mining height more than 6m. The paper introduces the design and calculation of debris shield of the powered shield support with 6.2M large mining height.
Jing Chen, Shao Xiang Hao, Xun Fan
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Intensity Optimization of Back-Link of Powered Support with Large Mining Height

2010 WASE International Conference on Information Engineering, 2010
One of the key research topics of the world’s mining industry is how to ensure safe and reliable work of the powered supporot with large mining height more than 6m. During the process of design and development, the advanced CAD/CAE technique can be used to identify potential problems and increase the reliability of the powered support.
Jing Chen, Shaoxiang Hao, Yanhui Zhang
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Microscale dispersion behaviors of dust particles during coal cutting at large-height mining face

Environmental Science and Pollution Research, 2018
In order to ensure safe production and occupational health at a large-mining-height fully mechanized mining face in a coal mine, the present study firstly establishes an airflow-dust coupled model based on gas/solid two-phase flow equations and combines numerical simulation and field measurement for analyzing the dispersion pattern of dust particles ...
Yao, Xie, Weimin, Cheng, Haiming, Yu, Biao, Sun   +3 more
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Design of coal pillars of gob-side entry between mining faces with large differences in mining height in deep mine

Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2019
In order to solve the problems of large deformations of gob-side entry and the fracture of coal pillars at large-height mining faces in deep mines, a case study of the width design of coal pillars ...
Wenyue Qi, Qiang Zhang, Jixiong Zhang, Jianguo Zhang, Cunli Zhu   +4 more
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Stability Analysis of Hydraulic Support in Large Inclined and High Mining Height Coalface

Applied Mechanics and Materials, 2011
Under the condition of large inclined angle, the stability control of hydraulic support was always the challenge for the fully-mechanized mining in large inclined coal seams. Based on the specific geological conditions of 509 coalface with large inclined and high mining in Gaozhuang mine, the model of hydraulic support had been drawn by using ...
Wei Zhang, Dong Sheng Zhang, Yong Shu Zhao   +2 more
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