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CROSSING SUPPORT OF THE DRIFT AND CROSSCUTS IN SUBLEVEL BAUXITE MINING
Srećko Majić
Sažetak
The report discusses the excavation method in underground bauxite exploitation of the Bauxite Mine Posušjc, as well as the experiences in crossing support of drifts and crosscuts till now, where it came in about 6% cases to the breakage of the frame support and to crossing ceiling caving. On the basis of such biggest caving, the estimate and dimensioning of critical support elements (runner and bar) were performed. The possibility of supporting by bolting and stell plate was also considered. For the central part of the crosscut the use of bolts was assumed, which are fixed in the up-face. and for the rest of crossing the expansion shell anchors. For the latter, the estimate for anchoring elements was elaborated. Technical, safety and economic advantage of the bolts support is proved when compared with the frame support.
Ključne riječi
bauxite; underground exploitation; frame support; rock bolt support
Hrčak ID:
14551
URI
Datum izdavanja:
4.12.1993.
Posjeta: 2.695 *