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Evaluation and demonstration of underhand stoping to control rock bursts.

Bush DD; Blake W; Board MP

NTIS: PB/85-216489, 1982; :1-191

10004594

Based on the results of this study, the underhand cut and fill stoping method, with mass destressing, is an effective method for controlling rock bursts and falls of ground for deep mining in the Coeur d'Alene Mining District. The procedure can be utilized to pull highly stressed pillars by converting from conventional overhand stoping methods or used as a primary recovery system. During the demonstration, only one minor rock burst occurred, with no injuries. The system facilitates accurate placement of vertical boreholes for effective mass destressing. Each mining cut is filled with cemented sandfill overlying a timbered mat that forms the back for the succeeding cut. For this demonstration, a cemented fill was mixed on the surface and piped to the stope. Costs for pillar recovery by this method are comparable and are considered cost effective over conventionally timbered overhand mining as a pillar recovery method.

Rock-bursts; Rock-falls; Rock-mechanics; Mining-industry; Environmental-control; Environmental-technology

19820101

CP; Final Contract Report

Contract

1982

PB85-216489

A10

OFR 62-85

SRC

NTIS: PB/85-216489

WA

Terra Tek, Inc.