Ore passes are a convenient way to transport and handle materials and minimize hauling distances between levels in a mine. Ore passes take advantage of gravity to move materials …

May 24, 2014 · Ore pass is a vertical or near-vertical opening created during underground mining operation to transfer materials. It is designed based on the gravitational force between …

Apr 2, 2017 · Ore passes are simply vertical or inclined openings for transfer of broken ore to the haulage system. They may be raises in the ore or in the walls of the deposit or timbered …

Sep 20, 2010 · Mines take advantage of gravity to collect broken ore by means of ore passes. The ore passes are raises driven by drill and blast or raisebored. While ore passes are most …

This document discusses the design of ore pass systems for underground mines. It provides engineering criteria for designing ore passes, draw points, feeders, and support systems. …

The design process is divided into several sections--rock flow requirements, support design, dump point design, and draw point design. Use of this manual provides open pit planning engineers …

Sep 1, 2015 · This paper details ore pass design issues in an operating sub-level cave (SLC) mine and the method used to determine suitable design parameters for future ore passes at …

Ore passes and chutes and gate systems for underground metal/nonmetal mines must meet the requirements specified in the U.S. Code of Federal Regulations (CFR), Parts 57 and 75.

A vertical or inclined passageway used to transfer ore to a level with a hoisting shaft or to another level.

Jan 1, 1996 · Design criteria and ore pass hang-up prevention and remediation strategies will include the effects of internal ore pass loads, blasting to relieve hang-ups, and rock mass …