Dynamics of Roof Rock Displacement in a Production Heading in the Course of Mining

摘要

A new method is proposed for predicting rock pressure with regard to statics, kinematics and dynamics. The static approach calculates strain state using the known classical method based on the mining guidelines. The kinematic approach takes into account the weight of overlying strata and makes the kinematic approach more specific. Dynamics is traced as nonlinear deformation in the course of mining, and the dynamic approach needs additional in-situ information on the rock mass behavior. The three approaches provide the total displacement of roof rocks in a production heading. The authors discuss a quasi-static approach determining dynamics in terms of the pliability of rocks ahead of an advancing face and feasibility of obtaining experimental data for the new method implementation.