sub level mining method

INTRODUCTION The sublevel stoping mining method is usually applied to a relatively steeply dipping, competent ore body, surrounded by competent wall rock. Ore is produced by drilling and blasting longholes, which can range from 50 mm 2 in. to 200 mm 7 in. diam, with lengths up to 90 m 300 ft.

Sublevel stoping is a commonly used method in large scale mining. It is a versatile and productive method that is primarily used for large orebodies with a steep dip, regular shape and defined ore boundaries. There are different variations of the method depending on the shape of the orebody.

Mining Mining Blasthole stoping When the dip of a deposit is steep greater than about 55, ore and waste strong, ore boundaries regular, and the deposit relatively thick, a system called blasthole stoping is used. A drift is driven along the bottom of the ore body, and this is eventually enlarged into the shape of a trough. At the end of the trough, a raise is driven to the drilling

Sublevel open stoping design of the O640, L651 and N 659 sub level open stopes in the 3000 orebod y of the Mount Isa copper mines, Queensland , Australia. Department of Mining, University of

Sublevel stoping configuration method in stopes where the ore is detonated by drilling a fan or parallel large part of the ore is removed from the stope as it is being detonated, leaving open stope.

Block gravity caving is a bulk underground mining method, which allows large lowgrade deposits to be mined underground. This method involves undermining the orebody to make it collapse under its own weight into a series of chambers from which the ore extracted.

The method is similar in some respects to sublevel cavingthe ore is mined from the top downward by a series of slices, and the overlying strata cave and follow the mining downward with a mat intervening between the caved overburden and the ore beneath.

SubLevel Caving Subsidence reaches surface at the Ridgeway underground mine. Using this method, mining is planned to extract rock from the stopes without filling the voids this allows the wall rocks to cave in to the extracted stope after all the ore has been removed. The stope is then sealed to prevent access.

The methods of driving sublevel or sill drifts a short distance above the haulage levels are similar to those employed in driving mainlevel headings. They are often, but not necessarily, smaller in cross section, and, when driven to connect a line of raises, direct shoveling into raises or handling of broken ore and rock for short distances in

Sublevel Caving Safety. Sublevel caving is a relatively safe mining method since the operations take place in small areas at a time and are highly mechanized. The uniformly distributed nature of generally 5mx3.7m sublevel nature of drifts aids in the safety of this mining method.

Other articles where Sublevel caving is discussed mining Sublevel caving This method owes the first part of its name to the fact that work is carried out on many intermediate levels that is, sublevels between the main levels. The second half of the name derives from the caving of the hanging wall and

A method of underground mining operation. WORLD39S BEST TREE FELLING TUTORIAL Way more information than you ever wanted on how to fell a tree

Shrinkage stoping is a mining method used for steeply dipping, narrower ore bodies with self supporting walls and ore. It is an overhand mining method that relies on broken ore being left in the stope to be used as the working floor and to support the walls. During the mining cycle, only 30 35 of the ore blasted is extracted being

Stoping is the process of extracting the desired ore or other mineral from an underground mine, leaving behind an open space known as a stope. Stoping is used when the country rock is sufficiently strong not to collapse into the stope, although in most cases artificial support is also provided.. The earliest forms of stoping were conducted with hand tools or by firesetting later gunpowder

A mining method involving overhand, underhand, and shrinkage stoping the characteristic feature is the use of sublevels which are worked simultaneously, the lowest on a given block being farthest advanced and the sublevels above following one another at short intervals.

A mining method involving overhand, underhand, and shrinkage stoping. Its characteristic feature is the use of sublevels. The sublevels are worked simultaneously, the lowest on a given block being farthest advanced and the subs above following one another at short intervals. The uppermost sublevel underneath the cover is partly caved.

Sublevel stoping..Underground mining methods 1. Hassan Z. Harraz hharraz2006 2014 2015 This material is intended for use in lectures, presentations and as handouts to students, and is provided in Power point format so as to allow customization for the individual needs of course instructors.

SUBLEVEL OPEN STOPING DESIGN OF THE O640, L651 AND N659 SUBLEVEL OPEN STOPES IN THE 3000 OREBODY OF THE MOUNT ISA COPPER MINES, QUEENSLAND, AUSTRALIA L. SLOANE Presented in partial fulfilment of the requirements for the degree MINING ENGINEERING IN THE FACULTY OF ENGINEERING DEPARTMENT OF MINING UNIVERSITY OF PRETORIA OCTOBER 2010

stoping, cutandfill, longwall mining, sublevel caving, and block caving. The second section describes underground mining equipment, with particular focus on excavation machinery such as boomheaders, coal cutters, continuous miners and shearers. 1. Underground Mining Methods 1.1. Classification of Underground Mining Methods