摘要
针对深部软岩巷道难支护的特点,结合围岩应力分布规律以及锚杆锚和锚索的支护特点,提出了深部软岩巷道锚杆锚索等应力承载拱强度理论.该理论是根据巷道所处的应力环境,通过锚索和锚杆的长短搭配,在巷道围岩中形成一个受力更为均匀的承载结构,从而提高围岩的自承能力,以此来维护巷道的稳定.此外,还推导出圆形承载拱的承载能力公式,对深部地应力较为均匀的工程具有一定的参考价值.
Aiming at the characteristics of difficult support in deep soft rock roadway, and combining with the stress distribution law and the bolt and cable support characteristics, this paper proposes the equal stress bearing arch strength theory in deep soft rock roadway by bolt and cable. The theory, based on the stress environment of roadway, and through matching the length of anchor bolts and cables, indicates it can form a bearing structure of a more uniform force in the surrounding rock, so as to improve the bearing ability of the surrounding rock and maintain the stability of roadway. In addition, this paper deduces the round bearing arch bearing capacity formula, which has some referential value for the project of more uniform ground stress in deep.
出处
《矿业工程研究》
2012年第4期17-22,共6页
Mineral Engineering Research
基金
湖南省自然科学基金资助项目(11JJ5030)
国家自然科学基金资助项目(51104063)
关键词
深部软岩巷道
破碎圈
应力峰值
等应力轴比承载拱
deep soft rock roadway
crushing circle
peak stress
equal stress axial ratio bearing arch
