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Selective coal mine overburden treatment with topsoil and

Overburden at a coal mine in the Hunter Valley, New South Wales, was stored in a flat-topped artificial mound with 14-degree side slopes. Topsoil was scarce, dispersive and readily eroded.

Contour coal mining overburden as solid waste and its

2021-3-31  @article{osti_5294341, title = {Contour coal mining overburden as solid waste and its impact on environmental quality}, author = {Minear, R A and Tschantz, B A}, abstractNote = {An overview has been presented in an attempt to highlight some of the traditional problems of coal mining with specific focus on contour mining in mountainous regions.

Physical and Geochemical Characteristics of Coal Mine

2012-7-5  The main operation of surface coal mining is basically removal of topsoil and overburden in order to extract the coal. If the overburden rock contains a significant amount of reactive sulfide mineral rather than alkali mineral, severe acid mine drainage (AMD) is likely to occur when it is exposed and reacts with oxygen and water.

Selective placement of overburden in surface coal mining

@article{osti_5399706, title = {Selective placement of overburden in surface coal mining problems and mining planning}, author = {Chang, J L and Kelley, J H}, abstractNote = {Selective placement of overburden is one of the measures that can mitigate surface coal mining's impact on environment which is mandatory by the Public Law PL 95-87 of 1977.

Effects of overburden characteristics on dynamic failure

2017-1-1  Between 1983 and 2013, there were nearly 400 cases of reportable dynamic failure accidents in coal and nonmetal mines, resulting in 20 fatalities, 155 lost-time accidents, and an estimated 48,000 lost man hours. These events have been documented for well over 100 years within the American underground coal mining industry. Over this period of time, mining practices and support technologies

Investigation of overburden failure characteristics due to

2021-2-7  When mining activity is carried out in multiple coal seams within a close distance, a significant interaction between these close seams may occur and result in the formation of complex and connected fractures in the overburden, which are favorable channels for water and gas movement and may lead to geological disasters such as groundwater and sand inrush, especially under the condition that coal seams have a fairly thin overburden

Effect of Mining Thickness on Overburden Movement and

2018-11-25  Through theoretical analysis, laboratory similarity simulation test, and other methods, this paper studies the effect of mining thickness on overburden movement and underground pressure characteristics for extremely thick coal seams by sublevel caving with high bottom cutting height, by taking Xiegou No.13 coal mine as the background, as the hard coal seam in the soft roof.

Measurement of overburden failure zones in close-multiple

2021-1-1  It is proposed that during the ascending mining of multiple coal seams, the overburden of the gob after the lower coal seam mining will undergo secondary breakage, and the “inverted triangle” area formed by the secondary breakage will control the key overlying strata, which provide important protection for ascending mining sequence.

Coal Mining and Production MIGA

2018-8-5  removal of overburden and coal extraction proceed in parallel strips along the face of the coal deposit, with the spoil being deposited behind the operation in the previously mined areas. In open pit mining, thick seams (tens of meters) are mined by traditional quarrying techniques. Underground mining is used for deep seams.

Coal Surface Mining Materials101

2021-3-15  In this method of surface mining, they make several layers of cuts and form benches of strata and coal seam. This method is particularly advantages where the mineral is present in thick layers overlain by overburden. This overburden is generally

Contour coal mining overburden as solid waste and its

2021-3-31  @article{osti_5294341, title = {Contour coal mining overburden as solid waste and its impact on environmental quality}, author = {Minear, R A and Tschantz, B A}, abstractNote = {An overview has been presented in an attempt to highlight some of the traditional problems of coal mining with specific focus on contour mining in mountainous regions.

Selective placement of overburden in surface coal mining

@article{osti_5399706, title = {Selective placement of overburden in surface coal mining problems and mining planning}, author = {Chang, J L and Kelley, J H}, abstractNote = {Selective placement of overburden is one of the measures that can mitigate surface coal mining's impact on environment which is mandatory by the Public Law PL 95-87 of 1977.

Effects of Coal Mining Height and Width on Overburden

2021-3-31  PDF Longwall pier-column backfilling is a partial backfilling technique initially designed in thin coal seam mines. With the increase of mining Find, read and cite all the research you need

OVERBURDEN DUMP SLOPE STABILITY: A CASE STUDY

2013-12-19  Mining Engineering By The removal of overburden is the first step in a coal winning operation, so as to expose underlying coal for excavation. The overburden material being a waste and nonmarketable product, it is removed and dumped safely and economically. The

influence of advance speed on overburden movement

Compared with on-site geological conditions, such as mining depth and coal thickness, advance speed has high controllability and adjustability and thus has an important influence on the mining pressure, overburden movement and even dynamic disaster events (Guo et al. 2019).

Surface Coal Mining and Reclamation ArcNews

Surface Coal Mining and Reclamation. Surface coal mining involves disturbing overlying rock layers (overburden) to expose and extract coal reserves using the area mining method wherein the overburden above the uppermost coal seam and the innerburden between the lower coal seams are removed in parallel strips (pits) across the coalfield until the area is mined.

Coal Mining and Production MIGA

2018-8-5  removal of overburden and coal extraction proceed in parallel strips along the face of the coal deposit, with the spoil being deposited behind the operation in the previously mined areas. In open pit mining, thick seams (tens of meters) are mined by traditional quarrying techniques. Underground mining is used for deep seams.

Overburden geology Britannica

In coal mining: Shovels and trucks. Overburden removal is the most important operation in the system. When the haul distances are small (for example, 500 to 1,000 metres) and the overburden material soft, a fleet of scrapers can load, haul, and dump the overburden.

Study of the Dynamic Development Law of Overburden

2020-4-16  In coal seam mining, the overburden strata mainly subsided, the horizontal displacement was very small, and the vertical displacement of the overlying strata all sank within the influence range.

Coal Surface Mining Materials101

2021-3-15  2.Area Strip Mining. 3.Open Pit Mining. 4.Auger Mining. Contour Strip Mining Contour Mining (Courtesy : flickriver) This type of mining method is primarily used for extracting coal seam from rolling or hilly terrain. This method consists of removing the overburden over the ore material material, then starting to outcrop along the hillside.

Effects of Coal Mining Height and Width on Overburden

2021-3-31  PDF Longwall pier-column backfilling is a partial backfilling technique initially designed in thin coal seam mines. With the increase of mining Find, read and cite all the research you need

A review of overburden fracturing and changes in

2020-10-13  overburden cavein process associated with underground mining significantly alters the regional water flow regime, with impacts to a distance of several ki lometers (Tammetta, 2013) . The impacts of underground coal mining on the hydrological behavior of disturbed overburden ha

OVERBURDEN DUMP SLOPE STABILITY: A CASE STUDY

2013-12-19  Mining Engineering By The removal of overburden is the first step in a coal winning operation, so as to expose underlying coal for excavation. The overburden material being a waste and nonmarketable product, it is removed and dumped safely and economically. The

Selection of overburden surface mining method in West

2017-10-2  It is applied in numerous coal and quarry mining operations around the world. The broad objective of this research was to improve current surface mining practices and reduce negative environmental impact of overburden removal in WV. The specific objectives were to (i) compare conventional sur-face mining method (drilling, blasting, digging

A Novel Caving Model of Overburden Strata Movement

2017-8-14  A variety of coal mining methods such as longwall mining, top slicing mining, sublevel caving mining, room-and-pillar mining, and backfill mining are widely used across the world [14,40]. Among these methods, longwall mining has the characteristics of safety, high efficiency, and high yield and is the preferred method of underground coal

Coal Mining and Production MIGA

2018-8-5  removal of overburden and coal extraction proceed in parallel strips along the face of the coal deposit, with the spoil being deposited behind the operation in the previously mined areas. In open pit mining, thick seams (tens of meters) are mined by traditional quarrying techniques. Underground mining is used for deep seams.

Mining system for removing overburden BHP Australia Coal

1994-9-14  A mining system for removing overburden from a valuable mineral or coal deposit from a pit (9) is disclosed. The mining system comprises a dragline (600) for removing overburden from a high wall side (3) of the pit (9) to produce a properly formed high wall face.

Theoretical Analysis of Mining Induced Overburden

2021-3-30  The overburden subsidence induced by underground mining has caused great damage to the ecological environmental and seriously threatens the safe use of underground structures. Focusing on the overburden subsidence, this paper uses theoretical analysis method to study the overburden subsidence boundary with a horizontal coal seam mining.

Coal Surface Mining Materials101

2021-3-15  2.Area Strip Mining. 3.Open Pit Mining. 4.Auger Mining. Contour Strip Mining Contour Mining (Courtesy : flickriver) This type of mining method is primarily used for extracting coal seam from rolling or hilly terrain. This method consists of removing the overburden over the ore material material, then starting to outcrop along the hillside.

Coal mining Choosing a mining method Britannica

2021-5-22  Coal mining Coal mining Choosing a mining method: The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining. Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods, and the choice of which method to use in extracting a coal seam depends on many