Movement laws and mechanical characteristics of top coal in blasting face

• 来源期刊: 煤炭学报（英文版）
• 年，卷（期）: 2010,（4）
• 页码范围: 352-355
• 页数: 4页
• 语种: 英文
• DOI: 10.1007/s12404-010-0404-0

摘要

Measuring the top coal movement and abutment pressure about Teaching Third Mine that belonged to the National Energy Investment and Development. It shows that the top coal's strong compression occurs 6 m in front of the face, the top coal is in front of side abutment pressure concentration increase area at this time, and the top coal horizontal displacement increase rapidly. Also analyzed the top coal mechanical properties, and the top coal under abutment pressure turned into block state. Finally, analyzed the top coal failure mechanism and the structure of the mechanical model, and also made a theoretical analysis of the top coal's ultimate bearing capacity.