Poorly controlled groundwater will have negative impacts on the safety, efficiency and economics of mining operations. Construction dewatering and groundwater control 3ed. Specific advice about minesite dewatering is available in the water quality protection guidelines mining and mineral processing reference 4a. In eastern monongalia county, aquifer dewatering is usually restricted to between 250 and 300 ft of rock overburden immediately overlying pittsburgh coal deep mines, where at least partial pillar extraction has occurred. Restart your computer, and then open the file again. The dewatering process occurs by evaporation or pumping. Pdf dewatering of mine tailings using eletrokinetic. Construction dewatering and groundwater control is an indispensable tool for all engineering and construction professionals searching for the most uptodate coverage of groundwater control for various purposes, the modern ways to identify and analyze sitespecific situations, and the.
An introduction to dewatering 21 may when groundwater is likely to be encountered within and below an excavation, this generally means bad news for the designer at least due to a number of undesirable effects, including increased loads on supports, flow of material, boiling see photo opposite or heave of the formation etc. Once calibrated, the dewatering of the underground mine was simulated according to the mining plan provided by the engineers. Some technical aspects of open pit mine dewatering by v. Dewatering publications martin preene is the author of the popular dewatering textbook groundwater lowering in construction. Apr 04, 2007 construction dewatering and groundwater control is an indispensable tool for all engineering and construction professionals searching for the most uptodate coverage of groundwater control for various purposes, the modern ways to identify and analyze sitespecific situations, and the modern tools available to control them. Construction dewatering introduction the control of groundwater is one of the most common and complicated problems encountered on a construction site. So mining and minerals processing are among the most developed branches of the national economy. Your computer may not have enough memory to open the image, or the image may have been corrupted. Construction dewatering can become a costly issue if overlooked during project planning. Groundwater engineerings team has decades of experience in dewatering projects around the world, and we provide a complete design and installation service to control your groundwater problems. In the round dewatering clayton, indiana the image cannot be displayed. In most contracts, dewatering is the responsibility of.
These structures not only require a dry base for their foundations but also good watertable stability in the girth. There are so many uses for dewatering pumps, it would be impossible to list them all. This dewatering guide is neither a textbook nor a substitute for engineering or technical knowledge, experience, or judgment. It presents the short characteristics of particular dewatering. 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. Construction dewatering and groundwater control design and. For more information, see references 3b, 3c and contact the department of environment and conservations contaminated sites branch.
Definition of dewatering dewatering is the term for the control of groundwater by pumping. Workers usually do it before excavation in order to decrease water table that can cause issues during excavation. Potential effects evaluation of dewatering an underground. Under some conditions dewatering may be harmful to the environment. Dewatering of excavations is required at construction sites generally for foundation works. Visual modflow is often used to develop a model of local flow conditions for designing a dewatering system.
Synopsis definition of dewatering surface water control widely used dewatering techniques less commonly used dewatering techniques. Science report hydrogeological impact appraisal for dewatering abstractions. Dewatering scribd read books, audiobooks, and more. Pumping wells can be added to the model to represent pumping conditions and the zonebudget program can be used to determine boundary flows. Libicki, chief geologist, poltegor, wroclaw, poland intro du ct ion poland belongs to the group of countries that has rela tively rich deposits of useful minerals. 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. Predictions for aquifer dewatering over underground mines. Dewatering systems can range in complexity from a simple diaphragm pump removing water from the base of an excavation, to an elaborate array of wells. Review of sludge dewatering techniques introduction dewatering is a physical mechanical unit operation used to reduce the moisture content of sludge so that it can be handled andor processed as a semisolid instead of as a liquid. Thinking that there might be a more efficient way of dewatering the mine area, huber retained a consultant, golder associates, inc. However, the subject is much broader, in that the technologies. The purpose of construction dewatering is to control the surface and subsurface hydrologic.
A practical guide to dewatering, second edition by cashman and preene. Sanasundaran professor columbia university new york, n. Npe pump crews setting up a pontoon mounted pump and poly pipeline at a gold mine in western australia. However, you can use dewatering pumps for construction purposes, for greywater floodremoval in basements or yards, and even agricultural applications like removing and transferring water from flooded fields or retention ponds. Introduction sludges and slimes o not often cewater at the cesired rates al. In the great majority of instances, application of such concepts will show that the expenditure of additional capital in proper disposal site design and construction, as. He has designed, performed and analyzed numerous full scale pumping tests for owners during the design stages of large civil projects as well as on moretrenchcontracted dewatering projects. Dewatering problem persists for discontinued and abandoned mines also 2.
Construction dewateringconstruction dewatering aaand and nd. The term dewatering means the removal of water from a highwall or from underground. Dewatering is a physical mechanical unit operation used to reduce the moisture content of sludge so that it can be handled andor processed as a semisolid instead of as a liquid. Comparison of designs for the dewatering of coal, gold and. A practical guide to dewatering, second edition uses the authors extensive engineering experience to offer practical guidance on the planning, design, and implementation of groundwater control systems under real conditions. The contractor selects the dewatering method and is responsible for its design and operation. Dewatering canadian mining journalcanadian mining journal. Download handbook of water and waste water treatment technologies by nicholas p. Xylem offers a wide range of pump technologies, from submersible to dry mount, ensuring the right pump for every job. In other mines, and in other geological settings, dewatering is fundamental to the viability of the mine and may require the use. Usually, dewatering is a technique implemented on most construction sites because it helps retrieve water accumulated in trenches. Various methods for dewatering of excavations are described in this article. If you have the need, or curiosity to learn dewatering theory.
Safety is our number one priority and we have rigorous measures in place to protect our people, partners and communities while continuing to support our customers at. In many circumstances, these pits are excavated below the water table. Construction dewatering and groundwater control is an indispensable tool for all engineering and construction professionals searching for the most uptodate coverage of groundwater control for various purposes, the modern ways to identify and analyze sitespecific situations, and the modern tools available to control them. Groundwater modeling for construction and excavation. A practical guide to dewatering, second edition by cashman and preene the book uses the authors extensive engineering experience to offer practical guidance on the planning, design, and implementation of groundwater. Field guide to construction site dewatering caltrans ca. Proposal of criteria for selection of dewatering methods. Proposal of criteria for selection of dewatering methods in surface mining jacek libicki poltegorengineering ltd. Depressurisation means the reduction of pressure by lowering the head of water. The book uses the authors extensive engineering experience to offer practical guidance on the planning, design, and implementation of groundwater control systems under real conditions. When a mine extends below the water table groundwater will, due to gravity, infiltrate the mine workings. Most of the mining activity is concentrated on open pit. Effectively managed dewatering processes typically employ continuous water level monitoring.
Proposal of criteria for selection of dewatering methods in. The most uptodate guide to construction dewatering and groundwater control in the past dozen years, the methods of analyzing and treating groundwater. Activities involving groundwater are closely regulated in many. Mine dewatering and water management at barrick goldstrike.
Piping, screens, and pumps are commonly made of materials that are chosen to provide long life and good wearing characteristics under sometimes severe conditions. In this paper, the term dewatering is used to include both dewatering and depressurisation. Weir minerals the answer to this question of course. Sump pumping can be effective in many circumstances, but seepage into the. Groundwater modeling for construction and excavation dewatering. On some projects groundwater is a minor impediment that can be dealt with on an adhoc basis. Mine dewatering the advantage of fully automatic, selfpriming pumps means these units are always ready to perform, from dry applications up to 28 of suction lift.
Mine dewatering is usually undertaken for several reasons. Optimizing dewatering processes in mining operations. Mine dewatering can be achieved by pumping continu. As mining works get deeper to provide access to ever diminishing supplies of minerals, mine dewatering is more in demand and the need to provide individual solutions to meet the unique operating characteristics of mines is greater. Those who are generally familiar with this field will immediately embrace the subject as a treatise on solidliquid separations. Dewatering methods for excavations at construction sites. Lessons learned from one of new zealands most challenging civil engineering projects. Use of numerical groundwater modelling for mine dewatering. 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. Xylems broad range of dewatering pumps enables you to work within the constraints of your mine, maximizing energy efficiency, and system decreasing downtime. Construction dewatering and groundwater control wiley. This is by far the best and most comprehensive book on construction dewatering that i have ever read. Review on dewatering pumping network for underground coal mine.
Firm and sound working conditions are indispensable when construction of buildings, powerhouse, dams, and other structures has to be executed. Dewatering equipment, too, has been improved in recent years. Cheremisinoff this volume covers the technologies that are applied to the treatment and purification of water. Groundwater is a frequent cause of disputes between the owner and the contractor.
These pumps are designed with flexibility in mind and excel in projects involving dirty water, wastewater or slurries while also managing solids with exceptional results. Discover engineering methods that can help you improve. Mine dewatering is an essential part of resource extraction, as it lowers the water table around the mine or quarry. Dewatering by unsuitable methods can under some conditions cause damage to adjacent properties, and result in third party litigation. Jan 31, 2018 the dewatering process occurs by evaporation or pumping. A phased approach to mine dewatering article pdf available in mine water and the environment 121. Dewatering means the separation of water from the soil, or perhaps taking the. The second edition explains the physical laws governing groundwater and soils, and provides practical solutions to construction dewatering problems. Linking theory and application in a way that is clear and understandable, groundwater lowering in construction. Epa hardrock mining conference 2012 denver, co, usa, april 35, 2012. Rental options are also available in certain areas.
Nov 23, 20 underground mine dewatering techniques in underground mines, the conventional approach is to allow groundwater to enter the workings, effectively using the mine itself as a drain the water entering the mine is passed along roadways by pumping or gravity to a deeper part of the mine sump or shaft bottom, to be pumped out via shaft or. Mar 21, 2017 dewatering is a vital part of mining and the need to provide individual solutions to meet the unique operating characteristics of mines is greater. Dewatering pump buyers guide how to pick the perfect. Underground mine dewatering techniques in underground mines, the conventional approach is to allow groundwater to enter the workings, effectively using the mine itself as a drain the water entering the mine is passed along roadways by pumping or gravity to a deeper part of the mine sump or shaft bottom, to be pumped out via shaft or. Summary outline construction dewatering and groundwater control design and application ceuspdhs. Dewatering control of groundwater construction of buildings, powerhouses, dams, locks and many other structures requires excavation below the water table into waterbearing soils. Review on dewatering pumping network for underground. Dewatering free download as powerpoint presentation. The control of groundwater is one of the most common and complicated problems encountered on a construction site. The position of the irrigation ponds, drinking water wells and crops was compared to the position of the predicted drawdown extents obtained with feflow. Mine dewatering open pits are developed in the mining industry for the extraction of minerals, raw materials, and aggregate.
Dewatering involves controlling groundwater by pumping, to locally lower groundwater levels in the vicinity of the excavation. In most contracts, dewatering is the responsibility of the contractor. The results showed that the lowering of the watertable in the. Mine dewatering is the action of removing groundwater from a mine. The book provides an excellent and practical account of many aspects of dewatering in construction, usefully including a detailed discussion of permanent groundwater control systems. Ufc 322005 dewatering and groundwater control wbdg. Jun 18, 2017 npe pump crews setting up a pontoon mounted pump and poly pipeline at a gold mine in western australia. Asce has been approved as an authorized provider by the international association for continuing education and training iacet, 1760 old meadow road, suite 500, mclean, va 22102. Construction dewateringconstruction dewatering aaand and. Martin preene is the author of the popular dewatering textbook groundwater lowering in construction. Nov 23, 20 synopsis definition of dewatering surface water control widely used dewatering techniques less commonly used dewatering techniques. Mine dewatering and water management at barrick goldstrike mine in the carlin trend, nevada johnny zhan, ph. An introduction to dewatering tonys technical blog. If the red x still appears, you may have to delete the image and then insert it again.