The resolution copper deposit lies more than a mile beneath the surface the most viable way to recover this ore body is by going underground, using a process called block caving block caving is a proven mining method using advanced technologies. Block cave mining - courses and live webcasts online courses, short courses and live webcasts about block cave mining for mining and geoscience from edumine. Due to caving of waste rock into the blasted ore, a certain degree of ore loss and waste rock dilution comes with the method caving will, sooner or later, also cause subsidence on the surface sublevel caving is a productive large scale mining method that enables safe and efficient use of mining equipment. Interaction between block caving and rock slope deformation kinematics as a function of cavepositionandorientationofdiscontinuities h m ahmed1, e eberhardt2 and w s dunbar1 several operations are considering the transition from surface mining to underground block caving to access deeper resources.
Cave mining handbook _____ page 2 of 138 chapter 1 introduction the object of this handbook is to highlight factors which lead to problems in cave mining and to summarize the contents of the “manual on block caving” so as to provide a reference on all facets of cave mining. Block caving is a large-scale mining method that allows for huge volumes of rock to be extracted efficiently. Because block cave mining is a long established mining method used at 20 mining operations around the world, and historically within the copper triangle, there is a wealth of information to better inform and understand subsidence and how to safely manage it. Abstract: the evolution of surface subsidence is an important focus of study above molycorp, inc’s newest block cave at the questa molybdenum mine near taos, new mexico the case study compares mature glory hole subsidence over the goathill.
In classification of underground mining methods, caving methods are regarded as high production methods these techniques are usually very costly and need great preparation however, the high production rate of these methods (including sublevel caving and block caving), make them cost-effective. This course provides a general introduction to the block cave mining method, covering advantages and disadvantages, basic elements of block caving, design issues, operational issues, safety issues, and economic issues. Laubscher’s chart is an empirical method of determining the subsidence parameters for block caving mining it relates the cave angle to the mine geometry, height of caving and density of rock it can be used to assess the potential and severity of subsidence. In underground mining, block caving is the only method with the costs comparable to surface mining methods, especially open pit mining a switch from open pit mining to block caving mining could .
At best, after the fact, the company wishes to use a mining method called block cave mining block cave mining has been described as an upside down open pit mine and although the mining would take place deep underground, the surface would be heavily impacted in several. Block cave mining is a mass mining method that allows for the bulk mining of large, relatively lower grade, ore bodies in terms of cost and rate of production, bulk mining of this kind yields a substantial return per ton and has a higher rate of production than other underground methods. Block caving is an underground hard rock mining method that involves undermining an ore body, allowing it to progressively collapse under its own weight it is the underground version of open pit mining in block caving, a large section of rock is undercut, creating an artificial cavern that fills with its own rubble as it collapses. Caving methods of mining there are three distinctive methods of working large deposits that involve, in some way, the factor of caving slightly different names are in use, but those that are simple as well as descriptive are top slicing, sublevel caving, and block caving. Block cave mining and panel caving mining techniques the most commonly used cave mining technique is block caving block caving is a large-scale mining method that is particularly useful for mining low-grade or disseminated ore bodies, which are at too great a depth to be exploited via open-cast mining.
46 block caving keeping up with caving caving mining techniques are experiencing block caving is an underground mining method that uses gravity to exploit. [block caving] is the lowest cost underground mining method available and is growing rapidly around the world and there is a significant shortage of people with skills in these areas . Ubc introduced web based cave mining forum cave mining cu-au porphyry there are over 45 cave mining projects in various stages of studies and development around the world cave mining methods will be the underground method of choice in the future it is only relatively recent that this mass mining method, despite 70 years of use, has begun proving its potential.
This information circular describes the development of block-caving methods and practices by the miami copper co at the miami mine in gila county, arizona it is one of a series published by the bureau of mines on mining methods, practices, and costs in various mining districts of the united states. The molycorp, inc (molycorp), questa block caving mine is located near the northern new mexico town of questa, as shown in figure 1 molybdenum has been mined at questa for over 80 years molycorp began large-scale open pit mining in 1965, but by the mid-1970s, plans for underground mining were developed to combat high stripping ratios. The diamond mining methods that include, open pit, block cave, vertical shafts, benching, crushing and grease tables.
Block caving mining method p osters 143 p osters , g61 block caving mining method stéphane tremblay (ul) there is growing interest for underground bulk mining methods, as they are the only way to extract ore in a continuous fashion, at a high production rate and a low operating cost. Bulk-mining methods are a necessary component of economically mining massive, low-grade porphyry copper, gold, molybdenum and diamond deposits, and block caving is the method of choice. Block caving 2 underground mining machinery glossary bibliography the selection of underground mining methods is primarily based on the geological/spatial. The intention of this case study is to discuss methods for raising the production rate of future block caving mines to 160,000 tonnes per day compared to current block cave mines, this output rate requires an enormous increase of the reaping rate it would also require an extremely large footprint using conventional mining methods.