沿空掘巷围岩变形特性

一般认为沿空掘巷掘进期间的围岩变形可分为减速和稳定变形两个阶段。实际观测发现，上述两阶段之前尚有一加速变形阶段。加速阶段的长短取决于应力与长期强度的比，它体现了围岩变形的剧烈程度，可作为衡量巷道稳定性的一项综合指标。沿空掘巷有一些特有的技术因素影响其围岩变形。本文给出了沿空掘巷围岩变形的表达式，并认为用长期强度理论说明和处理岩石变形、破坏问题，更具有一般性和更符合工程实际

The Character of the Deformation of the Rock Around the Road Driven along the Goaf

It is generally known that the deformation of the roch around the road driven along goaf during the driving is divided into two stages which are decelerative and stable deformation. The practical observations have found that there is an accelerative stage before the two stages. The length of the stage depends on the ratio of stress to long-term stvength;it reflects the deforming strength of the rock around a road,and may be taken as the comprehensive index to assess the road stability. There are some special technical factors which influence the deformation of the rock around the road driven along goaf .Also, the paper has given the eapression for the deformation of the rock around the road driven along goaf ,and thinks that explaining and solving the problems of the rock deformation and failure is more of generality and tallies with the engineering practice by the theory of long-term strength than the instantaneous strength.