Modeling of Floor Heave in Underground Roadways in Dry and Waterlogged Conditions

Floor heaving is a phenomenon that occurs in almost all mining roadways and tunnels. It can restrain the advance of heading face or cause serious problems during roadway use. The highest levels floor uplifting are observed coal mines, which reduce output even stop it altogether. intensity depends on rock type, stress mass, rocks’ mechanical properties. deformation develops when secondary state formed around working, much higher more dynamic case waterlogged rocks. presence water increases floor’s propensity to heave, especially clay rocks, such as claystones mudstones, if they include water-absorbed minerals. In this paper, we present new modeling methodology for heave. covers dry condition parameters Hoek-Brown failure criterion gradually lowered over time, condition, strength strain rocks reduced line with their progressive saturation. second case, claystone geomechanical were investigated, subjected up 24 h. results numerical simulation compared situ measurements convergence heave same mines from samples collected. consistency between simulations underground reached 90–99%.