MINING 1 : Open pit mining

It is a mineral property, the value of which has not been proved by exploration.

During the final mining cycle before abandonment, the pit slope sometimes is _____ to increase recovery.

Once a long-range open pit mining plan has been established, it is essential to develop a series of ____________.

It is the work of mining and marketing the ore.

A mining method with multiple benches forming an inverted circular pyramid, each bench smaller due to safety slopes.

mineralized zone w/ regular development in length, width, & depth, giving a tabular shape & often inclined significantly

It refers to the friction of a tire on the surface on which it moves.

The vertical distance from a specified reservoir water surface to the top of the dam, excluding any allowance for camber

A location where soil and rock materials from mining operations with no current economic value are collected or stored.

The vertical height of working benches should not exceed __ meters above the maximum reach of the shovel or loader used.

The volume of overburden costing a set unit to move, accepted as a standard for the mine or district where it occurs.

mining method that exclusively uses retreating techniques, with the cut-off grade defining the edges of major ore zones.

The recommended pit slope for the solid country rock is:

Computer-aided mine design is made possible by

For proper cycle balance in hauling, the cycle time for trucks must be:

It is the work involved in gaining a knowledge of the size, shape, position and value of an ore body.

Refers to removing overburden external to the mineral deposit and removing waste within the confines of the open pit.

The working pit slope, usually at a _______ than the final pit slope.

The area of the cross-section of an ore body is determined using

Tailings and slurries may be used as backfill in a subsidence area.

open-pit mining type for massive, thick-bedded, wide-vein, or tabular deposits deeper than single bench mining allows.

It supplements pit design & reserve estimation for feasibility and budget studies, vital to the decision-making process

Advantages offered by computerization

All unit operations involved in excavating or moving bulk materials during mining.

The angle, in degrees from horizontal, at which earth or rock will stand in a terraced excavation in an open pit/quarry.

Materials, solid/liquid, separated from ores during milling operations with no current economic value to the generator

One of the major components of an open pit, its other use is to retard or contain falling boulders or rocks.

Worthless material lying on top of a deposit of useful material.

a secondary tool, it can also serve as a primary tool in surface mining for scraping and cleaning overlying materials.

The recommended pit slope for gravel is:

A nearly vertical face at the edge of a bench, bluff, or ledge on a surface excavation.

In selecting a particular stripping method the ultimate aim is:

A surveying software

Machines for the continuous bulk excavation of minerals and rock rely for their basic action on ___ into a rock surface

A failure that occurs intermediate between the crest and the toe:

The discharge of tailing slurry from a submerged pipeline into deep ocean water.

Bench slopes usually are ____ than the pit slope, because rock can maintain a more nearly _____ wall for short heights.

term applied to the mining of near-surface seams of coal. Most stripping is effected in bedded sedimentary formations.

A graph of semi-variances calculated for data pairs at specific distances and directions, plotted against that distance.

The ratio between average bench width and bench height. It determines the width of the operating benches.

The sequence of unit operations used to accomplish mine development or exploitation.

permit specifying the origin and quantity of nonprocessed mineral ores or minerals shall be required for their transport

A failure that occurs below the toe of the bank:

Second level of engineering evaluation where concepts are quantified and compared, resulting in firm designs and costs.

Synonymous to truck capacity that is usually measured on a weight rather than volume basis to prevent overloading.

A tailings depository facility that may be made of cycloned tailings, zoned or homogenous earthfill, and rockfill.

at lower angle than the final pit slope, it should be kept at the maximum safe angle to boost efficiency and reduce cost

The top edge of a bench in an open pit mine.

Gradual or sudden failure of the soil mass underlying a bank slope, causing the mass to move outward and downward.

initial entry or a wedge-shaped prism of rock which must be removed to establish a new bench faces in Open Pit Mining

initial step in open-pit mining design is the compilation of a___ or, as it is sometimes referred to, a final pit design

Volume of overburden/weight of ore for entire ore body or cross-section.

Valley Dams, Side-Hill Impoundment and ________ are types of impounding structures for tailings in terms of forms.

Sometimes referred to as open cut mining

A systematic process combines materials into a uniform mass, improving efficiency/output, & reducing costs and reserves

combination chosen due to large angular rock overburden, limited access roads, steep grades, & the need for flexibility.

In general, with the off-the-shelf technology, the lowest cost of penetration in soft rock is obtained using:

In an open-pit mine, a bench is a single operational level from which minerals and waste are excavated from the face

It is defined as the ratio of overburden to ore at the ultimate boundary of the pit where the profit margin is zero.

A weighted moving average method where irregular earth property variations are better modeled by a stochastic surface.

Workhorse of the surface mining industry.

. It is the work of driving openings to and in a proved ore body to prepare it for mining and transporting the ore.

A comparative study of projected tonnage in available blocks versus actual production is used to determine if there was:

Whittle 3D computer software produces a

Refers to soil and/or rock materials from mining operations that have no current economic value for the generator.