What is the difference between block caving and sublevel caving?
Sub-level caving also allows for a slightly more selective extraction of the orebody than is attainable through block or panel caving. Production rates achieved in sub-level caving operations are typically lower than for block caves but higher than for stoping methods.” Caving is a non-selective, bulk mining method.
What is the applicability condition for sub level caving?
Sublevel Caving can be used in orebodies with very different properties and is an easy method to mechanize. This method is normally used in massive, steeply-dipping orebodies with considerable strike length, and usually has a high amount of dilution and low recoveries.
What is sublevel stoping in mining?
Sublevel stoping is a mining method in which ore is blasted from different levels of elevation but is removed from one level at the bottom of the mine. Before mining begins, an ore pass is usually drilled from a lower to a higher elevation.
Is longwall mining a caving method?
4 Mechanized longwall mining. There has been a greater stress on caving method due to scarcity of suitable stowing material near coal mining areas. The initial trials were based on use of friction props/ranging drum shearer combination for stowing with 100 ton hydraulic chocks as goaf edge support for caving faces.
What is block caving used for?
Touted as the deep mining method of the future, block caving is an underground mass-mining method that allows for the bulk extraction of large, relatively lower-grade ore deposits that are vertical in orientation.
What is the advantage of Horizon mining?
It is incorrect to call it horizon mining. The main advantage of this method is that all the galleries in a horizon are leveled. This adds to the efficiency of machinery and-workers and permits of high capacity transport form the face.
Which of the following method is best to control subsidence?
With advantages of the longwall backfill mining method, as well as the room and pillar mining method, a continuous excavation and continuous backfill (CECB) method in longwall mining is recommended to effectively control the ground subsidence.
Which blasting pattern is generally used in stope preparation of sublevel stoping?
Parallel Drill Pattern in a Sublevel Stope. The final drill pattern that can be used is parallel drilling; this application also works well in narrow mines. It involves drilling vertical holes in parallel lines.
Where is stope mining used?
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 fire-setting; later gunpowder was introduced.