Which of the following refers to the worthless materials that are associated with the valuable minerals in an ore deposits?

Shear strength is a material’s ability to

The fractures on which identifiable shear displacement has taken place.

What is the hardness of fluorite? 

To explore a horizontally lying deposit, how will you best position your holes?

Strain is defined as

A rock mass classification that quantifies discontinuity by the ratio of the length of the individual pieces of core recovered in a drill, having lengths of 10 cm or longer, and the total length of drill run:

When the rock reach its maximum stress, usually averaged over a plane, the rock can sustain under a given set of conditions.

Opening or connection to the surface from an underground excavation. 

Which of the following is the most common use of fatal accidents in underground mines?

Select one:

The term used to describe material separating the adjacent rock walls of discontinuities.

Primary or secondary horizontal or near-horizontal opening: oriented parallel to the strike of a pitching deposit. 

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

The ratio of the mass of a body to the mass of an equal volume of water at a specified temperature. 

Tertiary horizontal opening, often connecting drifts, entries, or rooms; oriented perpendicularly to the strike of a pitching deposit. 

Wall rock under the deposit

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

The concept that used to describe the intensity of internal forces set up in a body under the influence of a set of applied surface forces.

The term used to describe the intact rock between discontinuities.

It is the total in situ medium containing bedding planes, faults, joints and other structural feature.

The horizontal rock shelf in open-pit mining.

A rock with a low content of calcite is easy to drill and causes little wear on the drill bits.

Commonly considered as the surface exposure of a mineral deposit.

Country rock boundary adjacent to a deposit. 

When a drillhole is placed with explosives, it is termed a blasthole. 

Fracture is the general term used to describe all discontinuities in the rock. 

Mohs scale of hardness is directly proportional to a rock's compressive strength. 

In tension, cracks increase which leads to fracture at high load. 

A compound containing bromine belongs to halides.

Oxygen and Silicon constitute about _____% of the crustal mineral mass. 

Mohs Hardness Scale is quantitative in nature. 

Discontinuities are considered as primary structures in the rock. 

Defined the term horizontal loading and hauling of the blasted rock materials. 

Discontinuities are considered secondary structures in the rock. 

The third most abundant mineral in the earth's crust. 

The second most abundant mineral in the earth's crust. 

Which of the following form of energy application in rock is not part of the group?

In compression, crack growth is restricted and friction is decreased. 

This element constitutes 46.6% of the total crustal mineral mass. 

A penetration method that uses a jet piercer capable of spalling the rock. 

A mineral group composed of metals and sulfur. 

The fifth most common element in the earth's crust. 

In tension, cracks increase which leads to fracture at low load. 

Coined as a penetration method for traditional drilling in rocks

This is the tendency of a mineral to break along a plane of weakness. 

Where the debris is ejected occurs.  

Which of the following is not a crystal habit of a mineral? 

A mineral group composed of sulfur and oxygen.

Physical Properties can be identified by visual inspection and chemical properties.

Where the fracturing or breaking of the material from in-situ occurs. 

A penetration method that uses a highly pressurized fluid capable of breaking the rock.

Surface mines typically uses smaller holes for drilling process. 

This falls as the 2nd most common rock-forming mineral.