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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Design principles and key technologies of gob side entry retaining by roof pre-fracturing
Tunnelling and Underground Space Technology, 2019Abstract This study investigates gob side entry retaining by means of roof pre-fracturing. Based on short cantilever beam theory, the entry roof was pre-fractured from gob roof via orientated blasting. The gob gangue was then blocked and used as one side wall of the retained entry.
Yang, Jun, He, Manchao, Cao, Chen
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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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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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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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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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Filling wall mechanical analysis of gob-side entry retaining with composite roof
Arabian Journal of Geosciences, 2022Peng Yang +3 more
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Radiation therapy‐associated toxicity: Etiology, management, and prevention
Ca-A Cancer Journal for Clinicians, 2021Kyle Wang
exaly
Practice and Application of Gob-Side Entry Retaining Technology in Coal Mines
Mine Engineering, 2022openaire +1 more source
Experimental study on vertical water entry of twin spheres side-by-side
Ocean Engineering, 2021Xujian Lyu
exaly