Optimizing dewatering processes in mining operations. Total pumping solutions for dewatering and process water. Marandoo iron ore mine is situated 35km east of tom price in the province of pilbara, in western australia. Mine design for below water table clay detritals mining, marandoo mine, western australia conference paper pdf available september 20 with 53 reads how we measure reads. Attachment 1 amendments to conditions 46, 82, 83, 88, 89 and 810 change to proposal approved under section 46c on 9 may 20. Hydrogeological research programme at marandoo trial. Epa hardrock mining conference 2012 denver, co, usa, april 35, 2012. On some projects groundwater is a minor impediment that can be dealt with on an adhoc basis. Roger howell and vladimir ugorets recently joined srk us bringing with them significant experience in the fields of coal hydrogeology and coal mine dewatering. One component of the marandoo project is a water management strategy to manage the operations dewatering, including priority water delivery to the tom price township and mine operations, the reinjection of water into the southern fortescue borefield to the north and a proposed irrigated agriculture scheme. Predictions for aquifer dewatering over underground mines in. In this first part of a twopart series, he covers the engineering challenges behind an effective dewatering system. Such excavations require lowering the water table below the slopes and bottom of the excavation to prevent raveling or sloughing. Mine dewatering and water management at barrick goldstrike mine in the carlin trend, nevada johnny zhan, ph.
When contemplating rio tintos phasetwo plans for the marandoo mine in western australia, one could only be reminded of tom albanese, former ceo of rio tinto, and his outspoken view that for rio tinto, water was a strategic issue and first and foremost an enabler for mining. Introduction sludges and slimes o not often cewater at the cesired rates al. Dewatering from marandoo will also be reinjected into the southern fortescue aquifer to replenish the aquifer, as part of the water management plan for marandoo. Supply to the marandoo mine operations, tom water scarcity is a prominent issue for the australian public, and even more so in a drying climate. The groundwater system and possible effects of underground. In many circumstances, these pits are excavated below the water table. Dewatering is a significant engineering design and critical path component, and represents an ongoing operational cost for open pit mining operations. When this happens, southern fortescue will become a backup source for tom price.
Review on dewatering pumping network for underground coal mine. Dewatering an open pit mine is an important process and its implications should be thoroughly understood before selecting the pumping equipment and designing the pumping system. Giannatos 4 abstract masters research, by former geology graduate students at west virginia university, indicates that subsidence. At the skyline longwall coal mine in utah, the two teamed up to determine the source of large, persistent groundwater inflows emanating from fracture intersections. Effective dewatering is a prerequisite for safe and efficient mining. Use of numerical groundwater modelling for mine dewatering. The miner is growing hay using water pumped out from beneath its marandoo iron ore mine.
The development application is for pastoral operations including the planting and. Marandoo iron ore mine part of am70272, g471237, l47334, easement n276548 and crown lease 31141277. It is 100% owned and operated by hamersley iron, a wholly owned subsidiary of rio tinto iron ore. Dewatering occurs as the sludge moves through a series of. Data have been collated on coolibahs from several sites in the pilbara, including. Expansion of the mine capacity requires mining below the water table. Definition of mine dewatering dewatering and groundwater control forms a vital part of many mining projects. Rio tintos marandoo mine phase 2 dewatering project iron ore mine is located within karijini national park in the pilbara region of western australia. The performance of such a system is evaluated on the basis of the reduction in flow rate to the mine, and is plotted in figure 10 as the ratio of flow to the mine with the dewatering wells operating to the flow that would have been experienced in the absence of dewatering wells, expressed as a percentage. A phased approach to mine dewatering article pdf available in mine water and the environment 121. Drainage control and mine dewatering at faro open pit mine abstract by randy s.
Data requirements, major phases of modelling, and practical use of the model as a predictive tool for evaluation of the mine dewatering requirements and associated environmental impacts are discussed. With all units, the infeed sludge is mixed will polymer or other chemicals and placed onto a moving porous belt or screen. Groundwater is an important resource supporting many ecosystems in the pilbara region of western australia. Reeling easy during largescale dewatering australian mining. Where the conditions of this statement are in conflict with the conditions of statement no. Aquatech took immediate action, designing a dewatering system that would pump at three separate locations throughout the mine using the clients hdpe pipelines. Abstractunderground mine working changes hydraulic gradient which affect the underground surface water flow pattern. Sanasundaran professor columbia university new york, n. Mine dewatering and water management at barrick goldstrike. Thinking that there might be a more efficient way of dewatering the mine area, huber retained a consultant, golder associates, inc. Mining commenced in 1994 and current production is 15 million tonnes per annum. Mine dewatering and process water applications most mining and quarrying operations the world over require some form of dewatering system to. The design of mine dewatering systems in poland by jacek s.
Located adjacent to the karijini national park, the marandoo mine is one of the 12 mines. Weir minerals offers a full range of miningduty pumps that cover the whole spectrum from clear water to high solids content, in a wide range of designs to suit every dewatering and slurry application across openpit and underground projects. Dewatering canadian mining journalcanadian mining journal. If groundwater is not adequately controlled then excavations may flood or become unstable, and the efficiency of construction operations will be reduced, wasting time and money. Dewatering free download as powerpoint presentation. Lines abstract the groundwater system was studied in the trail mountain area in order to provide hydrologic information needed to assess the hydrologic effects of underground coal mining. The existing marandoo waste fines storage facility wfsf is. Marandoo iron ore project revised proposal february 2015 2 1. Marandoo mine, tom price, ashburton shire, western australia, australia. Dewatering and settlement monitoring plan waihi gold.
The relevant consent conditions are reproduced below section 2. This project comprised the installation and commissioning of a dewatering pipeline system at the marandoo mine site. Technology data sheet construction dewatering construction projects that extend below groundwater level present particular challenges. Nov 23, 20 synopsis definition of mine dewatering open pit surface water control open pit dewatering techniques underground mine dewatering techniques groundwater investigation techniques. Open pits are developed in the mining industry for the extraction of minerals, raw materials, and aggregate. Drainage control and mine dewatering at faro open pit mine. Some technical aspects of open pit mine dewatering by v. However, techniques are available to successful control groundwater. Dewatering a mine site, regardless if it involves a trickle coming out of a gardensize hose or a gusher blasting out of huge hoses or pipes, calls for the right equipment to handle the job properly and responsibly, and the units featured on the following pages are whats new in dewatering technology to help make mining safer. Grundfos dewatering pumps are designed to work in the toughest environments. Revised proposal to implement changes to the marandoo iron ore project. Technology data sheet mine dewatering groundwater is a common problem when mining, and developing a mine below groundwater level presents many challenges.
This solution seeks to maximise the inherent value of the water resource for positive. Total pumping solutions for dewatering and process water duties weir minerals africa. Surplus mine dewater from rio tintos hamersley iron marandoo operation is supplied to the hamersley agricultural project. Marandoo dewatering pipeline rio tinto iron ore this project comprised the installation and commissioning of a dewatering pipeline system at the marandoo mine site. Include the dewatering plan as part of the stormwater pollution prevention plan swppp andor the erosion and sediment control plan, detailing the location of dewatering activities, presence of aquatic areas, equipment, fuel storage, and discharge point. Dewatering and groundwater control is an important part of many open pit and underground mines. A portion of the surplus dewatering water from the marandoo mine phase 2 mmp2 project will be provided to hamersley pastoral station to be used as a source of irrigation water for the proposed project operations. Marandoo is an iron ore mine operated by rio tinto, 45 kilometres east of tom price. Predictions for aquifer dewatering over underground mines in the pittsburgh, sewickley, and upper freeport coals of northern west virginia by henry w. The hamersley agricultural project abc rural abc news. Most of the mining activity is concentrated on open pit. It induces slow inflow of water from, porous soil and rock mass towards the mining excavation.
Lopaschuk, geologicalgeotechnical engineer, cyprus anvil mining corporation, faro, yukon territory, canada there have been many problems associated with drainage control and mine dewatering since mining started at the faro open pit mine. Pdf mine design for below water table clay detritals mining. Large scale dewatering programs are a widespread feature of iron ore mining in the pilbara. Mine dewatering is the removal of percolated or logged water from mines to. Comparison of designs for the dewatering of coal, gold and.
Marandoo mine, tom price, ashburton shire, western. The land was excised from the karijini national park in 1991, and further a railway line was constructed across. The scroll conveyor bowl centrifuge is the most suitable type for dewatering sewage sludge. Scribd is the worlds largest social reading and publishing site. Its global reputation for innovation and quality spans more than 160 years. Water control in underground mines grouting or drainage. When some heavyduty mine dewatering was required, a set of winder units emerged as a winning solution to rio tintos first agricultural project at the marandoo mine in the pilbara. When a mine extends below the water table groundwater will, due to gravity, infiltrate the mine workings. Dewatering from rock faces in mine shafts, quarries, or gravel pits often contains abrasives such as sand, clay particles, drill cuttings, and other potentially damaging objects, and the ph value is usually very low. Conservation of trial dewatering discharge through re. If groundwater is not adequately controlled then excavations may flood or become unstable, and the efficiency of construction operations will. Synopsis synopsis water management for mining approaches to groundwater control examples of mine dewatering technology open pit underground shafts 3.
The groundwater system and possible effects of underground coal mining in the trail mountain area, central utah by gregory c. Mine dewatering is an essential part of resource extraction, as it lowers the water table around the mine or quarry. Mine dewatering dr martin preene preene groundwater consulting june 2014 2. The marandoo mine is an iron ore mine located in the pilbara region of western australia, 45 kilometres east of tom price the mine is fully owned and operated by rio tinto iron ore and is one of twelve iron ore mines the company operates in the pilbara. Dewatering control of groundwater construction of buildings, powerhouses, dams, locks and many other structures requires excavation below the water table into waterbearing soils. The epa has some residual concern that the dewatering proposed by rio tinto iron ore rtio for its marandoo mine phase 2 below water table proposal could affect the health of the coolibah woodland in the mt bruce flats. Effectively managed dewatering processes typically employ continuous water level monitoring. In the calendar year 2009, the combined pilbara operations produced 202 million tonnes of iron ore, a 15 percent increase from 2008. Poorly controlled groundwater will have negative impacts on the safety, efficiency and economics of mining operations. The marandoo pipeline project involved the design and. So mining and minerals processing are among the most developed branches of the national economy. The compact design enables easy transport of the complete unit and allows quick retrofit into existing dewatering systems. Review on dewatering pumping network for underground.
Dewatering surplus is managed through an integrated water management scheme that has become a key enabler for the development of marandoo s below water table resources in an environmentally sensitive location. Mine dewatering is the action of removing groundwater from a mine. That the minister notes that this report follows a decision by the epa to set a level of. Pdf mine design for below water table clay detritals. Technology data sheet mine dewatering groundwater eng. One component of the marandoo project is a water management strategy to manage the operations dewatering, including priority water delivery to the tom price township and mine operations, the reinjection of water into the southern fortescue borefield to. The mine is located within the marandoo mining lease, which was excised from the karijini national park in 1991, and is bounded by the park on three sides. Synopsis definition of mine dewatering open pit surface water control open pit dewatering techniques underground mine dewatering techniques groundwater investigation techniques. Figures 1 and 2 to date, all mining at the existing mine has taken place above the water table. Research programme at marandoo trial dewatering and reinjection test, karijini national park. It was anticipated that the addition of the new mine would increase production at marandoo from an output of 15 mtpa to 31 mtpa of iron ore whilst extending the mine. Mine dewatering is usually undertaken for several reasons.
The expansion of existing mining operations at marandoo by mining below the water table, including expansion of the existing mine pit and development of new waste dumps. The hamersley agricultural project hap is a project by rio tinto. Ghd report for department of water pilbara surplus mine dewater study, 6855 2. It is 100% owned and operated by hamersley iron, a wholly owned subsidiary of rio tinto iron ore located adjacent to the karijini national park, the marandoo mine is one of the 12 mines operated by rio tinto in the pilbara region. Red hill mining lease eis appendix i2mine water management overview report page 3 section 02 assessment context 2. Woodlawn mine upgrade earthworks tarago operations pty ltd heron resources. The seepex mine dewatering unit is engineered for efficient separating of oversized solids and conveying of mine water.
Marandoo iron ore mine, pilbara mining technology mining. Beneficial use solutions enable water 3 at the time of writing, it is noted that this policy is yet to be released. Activated sludge cannot be dewatered economically by centrifuge unless mixed with primary sludge, but the batch and conical disc types show promise for thickening it. Mining in a remove and harsh environment, rio tinto needed a company they could rely on to get the job done no matter the site complications, so they called levanta and we delivered.329 91 1543 1418 1013 547 1408 1027 214 704 470 289 800 97 945 623 717 197 1436 676 742 1017 53 1142 445 1458 1237 883 608 1416 1074 497 647