METHOD OF EXTRACTION OF BEYOND-CONTOUR MINERAL RESERVES UNDER OPENCAST BOTTOM AND IN ITS FLANKS

mining industry; applicable in finish opencast mining of deposits with steeply dipping ore bodies. SUBSTANCE: method includes division of opencast field into stages, level extraction of rock, removal of mineral reserves located beyond opencast contour by changing opencast flank. At last stage of dep...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	CHIZHOV E.A, SVETLAKOV A.A, ZOBNIN V.I, LUKICHEV V.G
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS MINING MINING OR QUARRYING
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	mining industry; applicable in finish opencast mining of deposits with steeply dipping ore bodies. SUBSTANCE: method includes division of opencast field into stages, level extraction of rock, removal of mineral reserves located beyond opencast contour by changing opencast flank. At last stage of deposit mining, cohesion value is determined by formula Km= 100-1.(L+10).lambda.Kl,, where Km is value of rock cohesion in solid mass; t/sq. m; 100 is empirical coefficient; L is mean distance from opencast flank to possible surface of sliding in formation of landslide, m; lambda is coefficient of structure weakening; Kl is value of cohesion in lump, t/sq.m. Then, stable angle of flank reclamation and boundaries of new contour of opencast are determined and deposit is mined according to selected technology. EFFECT: increased recovery of mineral from opencast due to extraction of reserves beyond opencast contour and reduced scope of stripping operations. 1 dwg, 1 ex