Results 181 to 190 of about 753 (208)
Gob-Side Entry Retaining Involving Bag Filling Material for Support Wall Construction
Sustainability, 2020 Gob-side entry retaining, also termed as non-pillar mining, plays an important role in saving coal resources, high production and efficiency, extending the service life of mine and improving the investment benefit.
Zhaowen Du, Shaojie Chen, Junbiao Ma
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An Innovative Approach for Gob-Side Entry Retaining in Thick Coal Seam Longwall Mining
Energies, 2017 Gob-side entry retaining (GER) is a popular non-pillar mining technique regarding how to reserve a gateroad for the use of next panel mining. When used in thick coal seams, the conventional entry retaining method requires a huge amount of filling ...
Manchao He, Yubing Gao, Weili Gong
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Stability and deformation of surrounding rock in pillarless gob-side entry retaining
Safety Science, 2012We analyzed the stability of the retained gob-side entry in four different Chinese coal mining sites and evaluated the influencing factors of roadway deformation such as mining depth, support strength and area of gob-side hanging roof. It was found that the length of cantilever roof block above roadway has a major impact on the deformation, whereas the
Nong Zhang +4 more
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Research on the Simulation of the Roof Fracture about the Gob-Side Entry Retaining
Advanced Materials Research, 2013The geological conditions of haulage roadway of the working face 1528 in GeQuan Coal Mine, which belongs to the JiZhong Energy Group CO., Ltd., and the research findings of Key Stratum Theory was taken into consideration, based on which established a mechanical model could reflect the basic features of rock stratum and made a profound investigation on ...
Jian Jun Shi +3 more
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Adaptation assessment of gob-side entry retaining based on geological factors
Engineering Geology, 2016Abstract The technique of gob-side entry retaining has been widely used in underground coal seam mining, where the headgate of current panel is retained and reused for adjacent next panel mining. To evaluate the adaptation of this technique, six geological factors, including coal seam dip angle, mining height, cover depth, thickness influence ...
Hongyun Yang +5 more
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Feasibility Analysis of Gob-Side Entry Retaining in Steep Coal Seam
2013 Fourth International Conference on Digital Manufacturing & Automation, 2013It's one of the key factors of utilizing the technology of gob-side entry retaining in steep coal seam that safely and effectively prevent caving rock blocks from rushing into the gob-side entry by sliding downwards along levels. Considering steep coal seam, mining process in fully-mechanize face is numerically simulated, the stress and deformation ...
Deng Yuehua +3 more
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Mechanical Characteristics and Control Technology of Floor in Gob-Side Entry Retaining
2018The effect of abutment pressure caused by the mining influence of two working faces can easily lead to floor heave in gob-side entry retaining. According to the distribution law of abutment pressure loading on the floor of gob-side entry retaining, a mechanical calculation model is established based on the elastoplastic theory.
Ying Xu, Le Shen
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Study on the Response of Surrounding Rock for Gob-Side Entry Retaining under the Mining
Applied Mechanics and Materials, 2013A coal mine in Chongqing +590m south four district 2443 working face as the research object, using the finite difference method (FLAC) which can solve the nonlinear large deformation problem, setting up the mechanical analysis model of the gob-side entry retaining, analyzing the structure characteristics of surrounding rock, and studying on the ...
Mao Sen Zhao +3 more
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Gob-side entry retaining formed by roof cutting without roadside support
International Journal of Oil, Gas and Coal Technology, 2018When using gob-side entry retaining (GSER) under hard-roof conditions, the roadside support deforms and destroys easily due to the great overburden stress induced by the large length and time of the hanging roof. Selecting the 20196 working face in the Linhua coal mine located in western China as an example, the technology of GSER formed by roof ...
Dawei Yin +3 more
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Practice and Application of Gob-Side Entry Retaining Technology in Coal Mines
Mine Engineering, 2022openaire +1 more source