mine draining methods

Acid Mine Drainage (AMD) South Africa

2016-6-17 · What is Acid Mine Drainage (AMD), why is it such a serious threat to South Africa and more importantly WHY has been it been silenced and kept under wraps by the mining industry and South African government for so long? Acid mine drainage (AMD) is the flow, or seepage, of polluted water from old mining areas. Depending on the area, the water may ...

Mine dewatering

2019-6-28 · The primary objective of mine dewatering is to allow safe and efficient mining to be done Dewatering may impact the groundwater table which is shared with the local communities and environment. This article outlines the important parameters to consider when designing an efficient underground mine dewatering system.

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High-frequency, long-duration water sampling in acid …

The Standard Mine is an abandoned precious metal mine site located at an elevation of 3350 m near the town of Crested Butte in central Colorado, USA. The Standard Mine was listed as a US Environmental Protection Agency Superfund site in 2006 due to high levels of Zn, Cd, Pb, and Mn issuing from the mine adit (Manning et al., 2011). Access to ...

Underground Mine Backfilling in Australia Using Paste ...

This paper gives a practical overview of underground mine backfilling in Australia using paste fills and hydraulic fills. The mining methods and different types of backfills are briefly discussed, with major focus on paste fills and hydraulic fills.

The hydrogeochemistry of surface water and …

Jahrestreffen 2015 AK Hydrologie Hydrogeochemistry of surface water and groundwater draining, Bochum, Alhamed 40 Fig. 3: Location map of the sampled …

Waste rock drainage prediction methods compared to …

Disposal in underground mine (during mine closure) Chemical passivation using microencapsulation; Wastes and waste facilities Research and Development. Waste rock drainage prediction methods compared to actual seepage water quality; Laboratory scale experiments for assessing the impacts of organic cover layer on heavy metal leaching from tailings

Blog | Mine Dewatering

2019-10-12 · Mine dewatering techniques. Dewatering and groundwater control is an important part of many open pit and underground mines. Effective dewatering is a pre-requisite for safe and efficient mining. Poorly controlled groundwater will waste money, slow down mining and potentially cause adverse environmental impacts. However, techniques are available to successful control groundwater.

Acid Mine Drainage Prevention and Control Options

2012-2-19 · ACID MINE DRAINAGE PREVENTION AND CONTROL OPTIONS 601 Prediction of performance The performance of the designed or selected option(s) compared to the adopted standards is predicted by applying appropriate engineering techniques (e.g., computer modelling). Key engineering considerations would include seepage genera­

Drainage and utilization of Coal Mine Methane (CMM) at …

2011-10-19 · Drainage and utilization of Coal Mine Methane (CMM) ... Methods of methane drinage We mine all the best Methane capturing and drainage from roadway excavations methane draining boreholes with the length of 40-70m roadway niche (extension of the …

Water Control in Underground Mines – Grouting or …

2012-2-19 · Mine dewatering is the most common method of water control in underground mines. Dewatering methods for underground mines can range from the relatively simple collection of water seeping into the mine from fractures or roof bolts, to more complex drilling of dewatering

How can acid mine drainage be treated?

2019-10-12 · Treatment of AMD: Acid mine drainage sometimes forms when certain minerals in the soil and rocks around mines are exposed to weathering processes during mining.These exposed minerals release their contents into creeks causing them to become acidic. This kind of pollution damages aquatic life and makes the water useless or harmful for others who depend on it for recreation or drinking water.

Types of subsurface drainage systems | Managing wet …

2019-8-28 · This Agnote explains the options available for draining excess subsurface water to a specific depth from the soil profile. The most suited drainage system is influenced by topography, rainfall, outfall type and location and especially soil type. More detailed explanations of each drainage type and how to determine which drainage system to use are covered in greater detail in other Agnotes in ...

Acid Mine Drainage

The newly opened mine operated with high efficiency using modern equipment and produced from 350 to 450 tons of ore per day. Owing to the larger disturbance and production methods, the acid mine drainage from the modern mine had a significant impact on an entire watershed .

Acid Mine Drainage (AMD) / Acid Rock Drainage (ARD)

2019-10-11 · Acid Rock Drainage as a concern and part of all metals and mining operations. ARD is often mislabelled AMD or Acid Mine Drainage too. So, to better understand AMD and ARD, let's begin by defining some terms like pH -The standard measure of acidity. The pH scale actually measures hydrogen ion concentration in water solutions. Pure neutral water has a pH of 7, acids have a pH less than 7 and ...

Technology Data Sheet Mine Dewatering

2013-12-3 · Technology Data Sheet Mine Dewatering Groundwater is a common problem when mining, and developing a mine below groundwater level presents many challenges. Poorly controlled groundwater will have negative impacts on the safety, efficiency and economics of mining operations.

Mine Drainage Technology Initiative

However, there are currently no standard methods that are widely used and accepted as accurate predictors of coal mine drainage quality by state and federal regulatory agencies or the coal mining industry. Hornberger and Brady (1998, page 7-5) state — "A tremendous amount of kinetic test information now exists, but the variety of test ...

Tailings

2019-10-9 · Tailings are the materials left over after the process of separating the valuable fraction from the uneconomic fraction (gangue) of an ore. Tailings are distinct from overburden, which is the waste rock or other material that overlies an ore or mineral body and is displaced during mining without being processed. The extraction of minerals from ...

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Acid mine drainage

2019-10-9 · Acid mine drainage, acid and metalliferous drainage (AMD), or acid rock drainage (ARD) is the outflow of acidic water from metal mines or coal mines. Acid rock drainage occurs naturally within some environments as part of the rock weathering process but is exacerbated by large-scale earth disturbances characteristic of mining and other large ...

Mine Backfill

2019-9-26 · Mine backfill is defined as the material or materials used to fill the cavities created by mining so as to establish and retain safe working conditions, economically. Recently, mine backfill is employed in strategies to reduce surface environmental impacts.

METHODS FOR PASSIVE REMOVAL OF MANGANESE …

METHODS FOR PASSIVE REMOVAL OF MANGANESE FROM ACID MINE DRAINAGE. ... draining an area surface mined and reclaimed a couple of years earlier ... PASSIVE REMOVAL OF MANGANESE FROM ACID MINE DRAINAGE.

EPA

2010-1-5 · Problems Associated with Mine Drainage Contaminated drinking water Disrupted growth and reproduction of aquatic plants and animals Corroding effects of acid on parts of infrastructure such as bridges Acid Mine Drainage Mines built as early as the 1800's were developed in a manner which utilized gravity drainage, to avoid excessive water accumulation in the mines

Sediment geochemistry of streams draining …

Sediment geochemistry of streams draining abandoned lead/zinc mines in central Wales: the Afon Twymyn. Authors; Authors and affiliations ... This paper examines the environmental legacy of the Dylife lead/zinc mine in the central Wales mining district. ... Materials and methods. Sediment samples were collected from the river bed and dry-sieved ...

Acid mine drainage

2006-3-1 · Physical methods. Engineered cascades or waterfalls are used to impart turbulence to the water draining from the mine or tip. The turbulence leads to assimilation of O 2 and results in rapid oxidation of Fe 2+ and a consequent precipitation of sludge rich in iron(III) hydroxide. Initially the capital costs for such treatments may be high, but ...