Prospecting (Mineral Deposit): the stage where ore or different valuable minerals are searched by:
Prospecting methods: direct (physical geologic) and indirect (geophysical and geochemical).
Find an appropriate place (maps, literature, and recent mines).
Air: aerial photography, mobile geology and satellite.
Surface: ground geology and earth science.
Spot associate outlier, analyse and measure.
Exploration (ore body): Examine and measure the extent and therefore the worth of ore by:
Taking samples (drilling or excavation), examine and take a look at them.
Estimate tonnage duty and grade.
Estimate the worth of ore and judge on whether or not to develop or abandon.
Development (prospect): gap up ore deposit for production.
Obtain mining rights (purchase or lease).
file environmental impact statement, technology assessment and allow.
build access roads for transport system.
Designate the location of surface plant and construct facilities.
Ore excavation (strip or sink shaft).
Exploitation (mine): massive scale production of ore.
factors in selection of method: earth science, geographic, economic, environmental and social safety.
Types of mining methods: surface (open pit, open cast, etc) and underground (room and pillar, block caving, etc).
Oversee prices and economic compensation.
Reclamation (real estate): restoration of mined site.
Reclamation of waste and tailings dumps.
Monitoring of discharge.
Roles, Tasks, and Responsibilities of Mining Production Personnel.
Determine materials and move containers in proportion to given directions.
Use fork lift truck to load and unload materials.
Move materials from storage or work sites to associate appointed space.
Operate industrial truck/electric hoist to help in loading materials and product.
Set up machinery and ensure that everyone production material is accessible.
Operate and manage instrumentality and stock materials as needed.
Determine and report faults to applicable parties.
Maintain instrumentalityand allotted production space cleanliness.
Follow company policies and procedures.
Perform all production connected tasks and activities.
Maintain positive work relation with customers, vendors, co-workers and management.
Maintain production instrumentality and communicate future requisition to plant manager in writing.
Perform given task and accommodates quality system needs.
Maintain correct stock levels to make sure shipments area unit complete.
Promote safety and implement company policies forever.
Production instrumentality and Materials employed in Mines
Mining Drills: employed in making holes downward-sloping underground. for example, if miner’s area unit needed to figure underground, drills are going to be employed in making massive enough holes to be used as a passageway for miners.
Blasting Tools: want to break down and fracture rocks by use of explosives to separate the precious product from the waste product. Blasting is additionally wont to take away pockets of unwanted material that stops mining machines and personnel access to the seam containing valuable materials.
Earth Movers: used frequently to hold loose soil and rock-based material from one location to a different. they’re additionally used for creating by removal, pushing and transporting the rock-based materials.
Crushing Equipment: want to break down the onerous rock matter or gravel to fine particles and manageable size for transportation.
Feeding, Conveying, and on-line component Analysis Equipment: once the excavator transporter brings the staple to the device for process, the feeding device feeds the fabric into the device and reciprocally the fabric is screened and every one outsized material is recirculated back to the device to make sure correct size fraction is obtained. they’re necessary to the mining business to manoeuvred management material flow among a mining and process operation, to facilitate economical operation of kit and verify operational rates and yields.
Specific Outcome two. Underground mining strategies.
Underground mining strategies area unit divided into 3 categories on the idea of the extent of support required: unsupported, supported and caving.
Unsupported: want to extract mineral deposits that area unit roughly tabular and area unit typically related to robust ore and close ore. These strategies area unit referred to as unsupported as a result of they are doing not use any artificial pillars to help within the support of the openings. However, generous amounts of roof bolting and localized support measures area unit typically used.
Room and pillar mining: the foremost common unsupported technique, used primarily for flat-lying seams or bedded deposits like coal, throne, limestone, and salt. Support of the roof is provided by natural pillars of the mineral that area unit left standing in a very systematic pattern.
Stope and pillar mining: an analogous technique employed in non-coal mines wherever thicker, additional irregular ore bodies occur. The pillars area unit spaced willy-nilly and placed in inferior ore so the top-quality ore is extracted.
Shrinkage stopping: is characterised by the mining advance being upward, with horizontal slices of ore being blasted on the length of the stope. some of the broken ore is allowed to collect within the stope to supply an operating foundation for the miners and is thenceforth far away from the stope through chutes. Shrinkage stopping is additional appropriate than sublevel stopping for stronger ore and weaker stone.
Sublevel stopping: differs from shrinkage stopping by providing sublevels from that vertical slices area unit blasted. during this manner, the stope is mined horizontally from one finish to the opposite.
Supported: typically employed in mines with weak rock structure.
Cut and fill: commonest of those strategies and is employed primarily in steeply dipping metal deposits. This technique practiced each within the upward and within the downward directions. As every horizontal slice is taken, the voids area unit crammed with a range of fill varieties to support the walls. The fill is rock waste, tailings, cemented tailings, or different appropriate materials. Cut and fill mining is one among the additional well-liked strategies used for vein deposits and has recently adult in use.
Square set stoping: involves backfilling mine voids. However, it depends principally on timber sets to support the walls throughout mining.
Stull stoping: uses timber or rock bolts in tabular, pitching ore bodies. it’s one among the strategies which will be applied to ore bodies that have dips between 10° and 45°. It typically uses artificial pillars of waste to support the roof.
Vertical Crater Retreat (VCR): is either supported or unsupported technique supported the carter blasting technique within which powerful explosive charges area unit placed in large-diameter holes and hearth. a part of the blasted ore remains within the stope over the assembly cycle, serving as temporary support for the stope walls.
Caving: strategies of mining area unit numerous are untrue and involve caving the ore and/or the supercentres. Subsidence of the surface usually happens after.
Longwall mining: this technique is specifically suited to horizontal seams, sometimes coal, at some depth. during this technique, a face of goodly length (a long face or wall) is maintained, and because the mining progress, the super adjacent strata area unit caved, so promoting the breakage of the coal itself.
Sublevel caving: utilized for a dipping tabular or huge deposit. As mining progress downward, every new level is caved in into the mine openings, with the ore materials being recovered whereas the rock remains behind.
Block caving: a large-scale or bulk mining technique that’s extremely productive, low in value, and used totally on huge deposits that has got to be mined underground. it’s most applicable to weak or moderately robust ore bodies that pronto split once caved. each block caving and longwall mining area unit wide used attributable to their high productivity.