Controlling floor heave of extraction opening by reinforcing sides and roof

• 来源期刊: 煤炭学报（英文版）
• 年，卷（期）: 2005,（2）
• 页码范围: 9-12
• 页数: 4页
• 语种: 英文

摘要

The effect of reinforcing roof, sides and floor corners to control floor heave of extraction opening was analyzed, It was proved by engineering practice and numerical simulation that reinforcing any part of surrounding rock have certainly control effect for floor heave, in the basis of this, the new way that roof, sides and floor corners were reinforced to control floor heave was put forward. Contrasting control result of reinforcing floor with this, it is determined that reinforcing is more suitable to control floor heave of extraction opening than reinforcing floor when advancing abutment pressure is in some range.