三软沿空掘巷合理护巷煤柱宽度研究 (Study on Reasonable Width of Gob-Side Entry Driving in Three Soft Coal Seam)
|Published in:||Hans Journal of Civil Engineering 的中文名称是土木工程, 2018, n. 6, v. 7|
|Abstract:||Using the FLAC3D numerical simulation method, the stress and displacement distribution of surrounding rock for the three soft coal seam were analyzed during driving and coal winning period when the different width coal pillars to protect roadway were placed under gob-side entry driving condition. Based on the analysis results, reasonable width of protecting roadway coal pillar was selected. The research results show that the coal width had little effect on the greater vertical stress in entity coal side and the greater vertical stress in coal pillar side increased with the width of coal increasing. The coal pillar was in a situation of unloading when the width of coal pillar was five meters. The displacement of the surrounding rock was the least when the width of coal pillar was five meters. Therefore, the reasonable width of protecting coal pillar should be five meters.|
|Copyright:||© 2018 by author and Hans Publishers Inc.|
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