Mine Ground Control Material/Notes Download-4-1 Sem R16

UNIT-I Definition and concept of ground control in Mines. Ground control practice in Mines. Constraints on ground control design; characteristics of coal measure strata.

UNIT-II Modern concept of strata pressure redistribution. Manifestation of strata pressure, convergence, load on prop, creep, heave, roof fall and facture systems due to mining. Insitu stress measurement, instrumentation.

UNIT-III Roof support: Timber and steel supports, friction and hydraulic prop Arches, shotcret, roof truss, roof bolts. Cable bolts Powered supports stowing caving strip packing pump packing rock reinforcement.

UNIT-IV Design of structures in rock; design of underground openings. Design of pillars, design of open pit slopes, waste dumps and embankments. Design of stopes.

UNIT-V Subsidence: Theories of subsidence, factors affecting subsidence, prediction and measurement of subsidence. Damage and prevention of damage due to subsidence. Bumps and rock bursts-causes, occurrence and control