Analysis of main roof breaking form and its mechanism during first weighting in longwall face

• 来源期刊: 煤炭学报（英文版）
• 学科: 工学
• 年，卷（期）: 2001,（1）
• 页码范围: 9-12
• 页数: 4页
• 分类号: TD82
• 语种: 英文

摘要

By field observation and simulating test in shallow seam logwall mining, the asymmetry breaking of main roof is discovered during the first weighting. Based on simulating model test and theoretical analysis, the mechanism of main roof first breaking is revealed, and the asymmetry breaking parameter is determined at all.