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  • Polycyclic aromatic hydrocarbon (PAHs) pollutants in Polycyclic aromatic hydrocarbon (PAHs) pollutants in

    The concentrations of polycyclic aromatic hydrocarbons (PAHs) in the leachate from the gangue and 20 groundwater samples, which were collected from the 12th Coal Mine around gangue piles in Henan Province, China, were determined by SPE-GC-MS. The characteristics of …

  • Leaching Behavior of Heavy Metals from the Coal Gangue Leaching Behavior of Heavy Metals from the Coal Gangue

    Site Ordovician limestone karst water plays a key role in the release of heavy metals from abandoned coal gangue or filled-in goafs in closed coal mines. In this study, a series of immersion experiments was performed to evaluate the leaching behavior of heavy metals in coal gangue from the Baizhuang coal mine in Shandong Province. The experiment was conducted with different immersion solutions ...

  • Effect of Bactericides on Control of Acidification Effect of Bactericides on Control of Acidification

    for in situ control of acidification pollution in coal gangue dumps in China. 2. Materials and Methods 2.1. Test Strains and Drugs The original bacterial strain used in this study came from a coal gangue dump in Yangquan, Shanxi, China. A coal gangue sample (5 g) was added to 50 mL of sterile water and oscillated at 160 rpm

  • Processes Free Full Text Feasibility of Using Gangue Processes Free Full Text Feasibility of Using Gangue

    When used as filling aggregates, the physical and mechanical properties of gangue and fly ash are crucial for the design of filling and transportation systems. The mineral composition of gangue and fly ash affects the filling body’s strength, and the fluidity of the slurry affects the mining engineering process. In this study, gangue and fly ash samples were characterized by X-ray ...

  • The soil chemical properties of reclaimed land in an arid The soil chemical properties of reclaimed land in an arid

    The whole coal field is distributed in the northeast–southwest strip. 22 The Shengli no. 1 opencast mine is the best ore field in regards to coal seams and coal quality, and it is located in the mid-west part of the coalfield, 6 km from Xilinhot city, and includes three outdoor dump sites (south dump, north dump, and side-slope dump) .

  • Frontiers Green Mining Efficiency and Improvement Frontiers Green Mining Efficiency and Improvement

    As a result, the input indicators are composed of two parts in the second stage. These are, respectively, the pollutants or associated resources produced from the first stage, like coal gangue, polluted mining water, and coalbed methane, and the new inputs of environmental governance investment and the relevant human resources in the second stage.

  • NHESS Potential ecological risk assessment and NHESS Potential ecological risk assessment and

    The aim of the present study is to evaluate the potential ecological risk and trend of soil heavy-metal pollution around a coal gangue dump in Jilin Province (Northeast China). The concentrations of Cd, Pb, Cu, Cr and Zn were monitored by inductively coupled plasma mass spectrometry (ICP-MS).

  • Xinhua Headlines Illegal mining threatens China national Xinhua Headlines Illegal mining threatens China national

    Aug 12, 2020 The excavated underground frozen soil, rock and coal gangue was piled up 40 to 50 meters high near the mine, burying large areas of grassland. Similar mining activities were seen during the reporter's previous trip to the mine on April 26, 2019.

  • China Vertical Combination Crusher, Vertical Combination China Vertical Combination Crusher, Vertical Combination

    China Vertical Combination Crusher manufacturers - Select 2021 high quality Vertical Combination Crusher products in best price from certified Chinese Crusher, Rock Crusher suppliers, wholesalers and factory on Made-in-China.com

  • Dynamic changes of nitrogen and dissolved organic matter Dynamic changes of nitrogen and dissolved organic matter

    Although the technology of coal mine underground reservoirs has been widely applied in the Western China, little is known about the variation of water quality induced by the removal transformation of nitrogen and dissolved organic matter (DOM) rich in mine water during its storage and transport in a coal mine underground reservoir. Column experiments were carried out at 30 C and at Darcy ...

  • International Journal of Coal Geology International Journal of Coal Geology

    Garrison et al., 2017).6 The Ruth Mullins coal mine fire (Fig. 1) is the most studied coal fire in eastern Kentucky. The fire was first visited by Hower, Stracher, and others in March 2007. Following remediation in the spring of 2007, it was thought to be extinguished until smoke was noted on the opposite side of the ridge in September 2007 ...

  • [A Classification Method Based on the Combination of [A Classification Method Based on the Combination of

    Thus, this study firstly acquired visible and near-infrared spectrums of 12 coal samples and 115 gangue samples from Tiefa mining area in China. Most of the gangue samples’ spectrums are different from those of the coals, which can be easily distinguished.

  • Cradle to Grave The Environmental Impacts from Coal Cradle to Grave The Environmental Impacts from Coal

    like geology, demographics and climate, impacts will also vary from place to place. For example, effects from coal mining may be the biggest concern in the coal-field regions of the country, while inhalation exposure may be the foremost risk in an urban setting and, in less populated rural America, visibility impair-ment and haze may be of ...

  • Extraction of alumina from alumina rich coal gangue by a Extraction of alumina from alumina rich coal gangue by a

    1. Introduction. Coal gangue is an industrial solid waste produced by coal mining and processing [1–3].The average production of gangue accounts for 10–15% of raw coal production [4,5], making coal gangue one of the biggest solid wastes in China.At present, utilization ratio of coal gangue can reach about 60% in some countries.

  • Instability Mechanism of a Multi Layer Gangue Roof and Instability Mechanism of a Multi Layer Gangue Roof and

    Jun 29, 2020 A multi-layer gangue roof of a steeply dipping coal seam with a large mining height face area was analyzed using physical simulation, numerical simulation, theoretical analysis, and field measurement methods to evaluate the roof deformation and the mechanisms associated with the instability of the hard gangue and soft coal interlayer. The results indicated that the first weighting …

  • Xinhua Headlines Illegal mining threatens China national Xinhua Headlines Illegal mining threatens China national

    Aug 12, 2020 The excavated underground frozen soil, rock and coal gangue was piled up 40 to 50 meters high near the mine, burying large areas of grassland. Similar mining activities were seen during the reporter's previous trip to the mine on April 26, 2019.

  • TongLi mineral processing operational setting for roll TongLi mineral processing operational setting for roll

    TongLi is a large-scale crusher manufacturer and supplier of sand making machines. It specializes in the production of various types of crushers, mills, sand making machines and other equipment, with various models and complete functions, which can meet the professional needs of mines, quarries, and coal mines.

  • Sludge amendment accelerating reclamation process of Sludge amendment accelerating reclamation process of

    Feb 03, 2021 In recent years, an increasing amount of research has begun to explore the use of industrial solid waste in mining areas to build reconstructed mine substrates (RMS), such as coal gangue 2,3. On ...

  • Numerical investigation of failure evolution for the Numerical investigation of failure evolution for the

    Longgu Coal Mine are approximately 1.683 billion tons, the designed production capacity is approximately 6 million tons per year, and the designed service life is 82 years. Longgu Coal Mine has good development prospects. The coal gangue separation system chamber group in Longgu Coal Mine mainly consists of four super‐large sec-

  • Processes Free Full Text Feasibility of Using Gangue Processes Free Full Text Feasibility of Using Gangue

    When used as filling aggregates, the physical and mechanical properties of gangue and fly ash are crucial for the design of filling and transportation systems. The mineral composition of gangue and fly ash affects the filling body’s strength, and the fluidity of the slurry affects the mining engineering process. In this study, gangue and fly ash samples were characterized by X-ray ...

  • The environmental characteristics of usage of coal gangue The environmental characteristics of usage of coal gangue

    Jan 01, 2014 Coal gangue is the by-product of coal mining. The average production of coal gangue is approximately 10–15% of raw coal production in China, depended on mining and geological conditions (Liu and Liu, 2010). Due to the high content of clay minerals and carbon, coal gangue could also be a valuable resource.

  • Utilization of coal gangue as coarse aggregates in Utilization of coal gangue as coarse aggregates in

    Jan 25, 2021 The major constituents of the coal gangue are SiO 2 and Al 2 O 3. The chemical composition of the coal gangue is similar to that of natural gravel. Table 2 indicates that using coal gangue as the replacement of natural gravel as coarse aggregates in concrete is possible.

  • Microstructure of Coal Gangue and Precipitation of Heavy Microstructure of Coal Gangue and Precipitation of Heavy

    The microstructure and mineral composition of the gangue play a decisive role in the precipitation of heavy metal elements. In this study, the microstructure, mineral composition, and precipitation of heavy metal elements of coal gangue with different weathering degrees were analyzed through electron microscopy, X-ray diffraction, and static immersion leaching experiments.

  • Trace Elements in Coal Gangue A Review IntechOpen Trace Elements in Coal Gangue A Review IntechOpen

    Apr 13, 2017 1. Introduction. Coal gangue is a significant residue during the processing of coal mining and coal washing, which accounts for approximately 10–15% of raw coal production and becomes one of the largest industrial residues in China [].The rapid growth of the mining industry in China over the last decades has resulted in large amounts of coal gangue piled in wastelands.

  • Paste like self flowing transportation backfilling Paste like self flowing transportation backfilling

    Mar 01, 2009 The Suncun Coal Mine (SCM) of the Xinwen Coal Group, Shandong, China, is the deepest coal mine in our country with a mining depth of 1300 m. Coal gangue hills, occupying 20 hm2 of land, have exceed their limit and continue to increase by 2.005 t annually, which has led to serious pollution of the environment and the Xinwen river.

  • Potential ecological risk assessment and prediction of Potential ecological risk assessment and prediction of

    crease soil heavy-metal contamination around a coal gangue dump in the Yangcaogou coal mine and other similar areas. 2 Materials and methods 2.1 Study area Yangcaogou coal mine is located in the eastern part of Changchun city, Jilin Province, China. It lies between latitudes 43 3505900 N and 43 5604400 N, and longitudes

  • Compression of Aggregates of Acid Leached Coal Gangues Compression of Aggregates of Acid Leached Coal Gangues

    The compression mechanical properties of coal gangues subjected to acidic immersion were examined using a cylinder and a YAS-500 electrohydraulic servotesting system in order to investigate the effects of pH and particle size on its compaction stress-strain and stress-compaction relationships. The evolutionary trends of the leaching solution’s pH at various immersion times during the ...

  • The integrated drainage technique of directional high The integrated drainage technique of directional high

    Nov 01, 2020 The drainage technique of RER has been applied in many mines in China ().According to domestic researches on the drainage effect and gangue emission of over 40 practical cases of RER, figures show that the extraction amount is within the range 84,000–72,600 m 3 /d. The gas extraction amount accounts for 4.7%–11.2% of the total gas emission to the working face (Szlązak et al., 2014).

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