Roof separation characteristics of laminated weak roof strata of longwall roadway

• 来源期刊: 煤炭学报（英文版）
• 年，卷（期）: 2004,（2）
• 页码范围: 19-22
• 页数: 4页
• 语种: 英文

摘要

The roof separation was investigated in a coal mine as part of the site characterization of roof strata deterioration in a longwall roadway. The separation of laminated,weak roof strata was initially characterized as the maximum separation, effect of geological setting on separation and the effect of mining activities (heading development,time-dependent and longwall extraction) on separation. Then the separation process was studied, so as to answer the questions of: when the separation occurs; where the separation is located and what geological setting it relates to; how large of the separation is; and how the separation propagates.