The Mechanics Mechanism on Water-bursting of Underground Cavity and the Effect Analysis of Slip Flow

摘要

Aiming at the appearance of coal floor uplift water bursting, this article analyzes the characteristics of the stress and strain within the rock mass around a cavity before and after its formation. In this paper, the authors calculated, tested and verified the change tendency of stress and strain within the rock mass below a cavity under these three conditions: a well-distributed, a concentrated and an actual loading, summed up the mechanical conditions on the type of water-bursting of coal floor uplift, and also analyzed and put forward a dangerous depth of water-bursting and the important action of slip flow on the coal floor uplift water-bursting.