Nur fatmawati
16611047
Impact of bearing plates dimensions on interaction of mine workingssupport androck mass.
Mine support for main and developmental workings is classified according to the support material, according to the nature of the structure (rigid, yielding, articulated, or mixed support), according to service life (permanent or temporary support),according to the type of mine cross section (trapeziform, arched [open or closed], annular, elliptical, or polygonal), and according to the type of working (flat, inclined, or vertical faces).Arched cast concrete-block support is used in horizontal and sloping workings (to 30-35°) for average stability and with strong (non heaving) rock in the soil. When peripheral pressure is present, the walls of the arched support are madecurvilinear. Cast reinforcedconcrete support differs from a cast concrete-block support by the presence of reinforcement, which may be flexible (made of steel rods) or rigid (made of metal beams) and which withstand the tensile forces fromconsiderable and nonuniformly distributed rock pressure.
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