2022
DOI: 10.3390/su14159417
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The Optimization of Coal Pillars on Return Air Sides and the Reasonable Horizon Layout of Roadway Groups in Highly Gassy Mines

Abstract: Multiple roadways are opened to solve the difficulties in gas control in the high seam working face of high gassy mines, resulting in a large width of coal pillars between roadway groups. Moreover, recovering coal pillars is challenging during stoping, which causes serious resource waste. While the size of coal pillars is optimized, the reasonable horizon layout of roadway groups is performed to ensure a fine recovery rate of coal resources, mine safety, and efficient production. Theoretical analysis was appli… Show more

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Cited by 4 publications
(3 citation statements)
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References 10 publications
(11 reference statements)
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“…Chen et al [11] believed that retaining a water-resisting coal pillar is an effective measure to prevent water inrush, and water pressure and seepage rate of overlying strata are key factors to predict potential water inrush. Ma et al [12] drew the stress distribution of the floor under different coal pillar widths and derived the stress distribution data of the floor. Numerical simulation method is used to compare the stress distribution of roadway floor and the deformation characteristics of surrounding rock under different coal pillar widths.…”
Section: Introductionmentioning
confidence: 99%
“…Chen et al [11] believed that retaining a water-resisting coal pillar is an effective measure to prevent water inrush, and water pressure and seepage rate of overlying strata are key factors to predict potential water inrush. Ma et al [12] drew the stress distribution of the floor under different coal pillar widths and derived the stress distribution data of the floor. Numerical simulation method is used to compare the stress distribution of roadway floor and the deformation characteristics of surrounding rock under different coal pillar widths.…”
Section: Introductionmentioning
confidence: 99%
“…The distribution of the stress area of retaining the top or bottom coal of the roadway were slightly different: in terms of the high-stress area of the two sides, the high-stress area of the retaining the top coal for the roadway was slightly larger; for the low-stress area of the roof and floor of the roadway, the difference was not large. In rock mechanics, the ratio of secondary stress to primary stress after the roadway opening is usually defined as the stress concentration coefficient at this point [38][39][40]. In this work, the stress concentration coefficient refers to the stress concentration coefficient at the peak stress.…”
Section: Stress Characteristics Of Surrounding Rock Of Retaining the ...mentioning
confidence: 99%
“…Researchers have studied the optimized layout of the working surface roadway. Zhang et al [6,7] combined the coal seam occurrence of the Lu'an mining area to optimize the layout of comprehensive coal mining roadways for high-gas thick coal seams. High alley pumping with Y-shaped ventilation or gob-side entry retaining with W-shaped ventilation and high alley pumping are adopted for the gob-side entry retaining of the fully mechanized mining surface.…”
Section: Introductionmentioning
confidence: 99%