"Resistance"or"Yielding"?Discussion on the Basic Concept for Dealing with Rock Squeezing Problems
Based on the analysis of squeezing of weak rock under high in situ pressure,as a basic concept for dealing with squeezing problem,the"yielding principle"is pointed out in the paper,and relevant techniques for deforma-tion releasing under a constant resistance are introduced moreover.Meanwhile the function difference between pre-stress anchorage cables and untensioned rock bolts are discussed and appraised.In other hand,for dealing with re-sidual deformation,a suggestion is to arrange high deformation(compressible)fillings between the primary support and the extrados of the second lining in order to flexibly choose the timing of the second lining.
Weak rockSqueezing deformationTreatmentYieldingDeformation releasing under constant resistanceSeparate lining
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