摘要
利用不对称有限元模型模拟软岩巷道掘进,使用巷道岩石应力释放比例确定支护时间。分析了不同应力释放比例对巷道变形的影响,通过观察支护时间-应力曲线和支护时间-位移曲线,确定软岩巷道支护应在应力部分释放后实施,提前或滞后实施将影响施工效果,对现场施工具有指导意义。
Roadway excavation in soft rocks was simulated by use of finite element model. Support time was determined by roadway rocks stress release proportion. Influence of different stress release proportion on roadway deformation was analyzed. On the basis of support time-stress curve and support timedisplacement curve observation, it＇s proposed that roadway support in soft rocks should be performed after stress partially released, ahead or lag support will affect performance effect, which has signification to guide roadway support performace.
出处
《安徽理工大学学报（自然科学版）》
CAS
2008年第4期26-28,共3页
Journal of Anhui University of Science and Technology:Natural Science
关键词
软岩巷道
数值模拟
支护时间
soft-rock roadway
numerical simulation
support time
