摘要
为了研究巷道开挖后巷道周边应力分布特征及松动圈半径的大小,根据霍克布朗准则探讨了松动圈形成的力学机理,提出了松动圈半径的计算公式,并介绍了松动圈测试原理、测试方法及结果。结果表明理论分析与现场实测是一致的,对井下支护设计具有一定的借鉴意义。
In order to study the stress distribution features of the surrounding rocks along the mine roadway after the roadway excavated and the radius size of the released circle,according to the Hoek-Brown strength criterion,the paper discussed the mechanics mechanism of the released circle formation and provided the calculation formula of the released circle radius.The paper introduced the measuring principle,the measuring method and result of the released circle.The results showed that theoretical analysis and the site actual measurement would be the same and could provide the references to the support design of the underground mine.
出处
《煤炭工程》
北大核心
2011年第2期97-99,共3页
Coal Engineering
关键词
围岩
巷道
松动圈
HOEK-BROWN准则
surrounding rock
gateway
released circle
Hoek-Brown strength criterion
