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2019-3-1 Generally speaking, coal gangue normally contains pyrite, and approximately 15% residue coal or other organics, which provide the preconditions for spontaneous combustion (Finkelman, 2004). As a type of artificial structure, the coal gangue hills often have large internal voids due to loose and chaotic piling methods (Hao and Zhang, 1992).
Coal gangue, a residue obtained during the coal mining process, accounts for 10–15% of raw coal produced. Usually, this coal gangue is transported and stacked loosely in the nearby areas. Long term piling up of this mine waste can volatilize large amounts of potentially toxic heavy metals which have the ability to infiltrate surrounding
and some human factors such as new coal gangue piling up steadily, some physical-chemica l properties of the surface soil in accumulation areas of coal gangue has changed. F or example, the
Coal gangue is one of the major solid wastes produced as a result of coal mining and its washing. Generally, the total discharge capacity of coal gangue can reach up to 10–15% of the total raw coal extraction .In China, approximately 315 million tons of coal gangue is produced on annual basis, with a total piling of about 4.5 billion tons .
2019-4-26 Coal gangue is one of the major solid wastes produced as a result of coal mining and its washing. Generally, the total discharge capacity of coal gangue can reach up to 10–15% of the total raw coal extraction [10]. In China, approximately 315 million tons of coal gangue is produced on annual basis, with a total piling of about 4.5 billion
2018-6-19 contains seven coal gangue piles, covering an area of ap-proximately 25,695 m2, and two loess terraces, covering an area of approximately 3700 m2. The average height of coal gangue piles is 36 m. In some regions where the slopes are greater than the natural repose angle, collapse and soil erosion frequently occur. Coal gangue is piled
China is the world’s largest coal producer country. However, large-scale coal mining has led to severe environmental pollution issues such as surface subsidence and gangue piling up. The gangue discharging amount has ranked the first in the world and coal mine enterprises are facing enormous discharging reduction pressure.
2019-7-30 e gangue backfilling GER (Figure 1(b)) is an innovative stability, such as timber cribs, dense pillar, gangue piling, andmasonrywalls[20,21].However,duetoissuesincluding low support force, large deformation, poor gob isolation, Coal gangue is a concrete material utilizing gangues as
2016-10-15 The coal-washing process is to sieve coal from ash and gangue using flotation, gravity concentration, etc. Due to the heavy mass, mercury tends to accumulate in the gangue and other solid wastes, with a previous study suggests that coal-washing
Coal gangue with/without wild puff balls growing on or covering up were analyzed by means of inductively coupled plasma atomic emission spectrometry (ICP-AES) and atomic fluorescence spectrometry (AFS) to detect the contents of heavy metal elements in the plants. Seven heavy metals were chosen to do the experiments, which showed that the puff balls have strong enrichment capacity for heavy
2018-12-10 1. Introduction. Spent pot-lining (SPL) is a poisonous and harmful waste solid resulting from aluminum electrolysis (Sajwani, 2017).In terms of production and consumption, aluminum is the largest non-ferrous metal worldwide (Holywell and Breault, 2013).Moreover, Hall–Héroult molten salt electrolysis is the only method used in modern aluminum production (Haverkamp, 2011), however, after 5
2016-10-15 The coal-washing process is to sieve coal from ash and gangue using flotation, gravity concentration, etc. Due to the heavy mass, mercury tends to accumulate in the gangue and other solid wastes, with a previous study suggests that coal-washing process can remove 50–60% of mercury in raw coal,.
China is the world’s largest coal producer country. However, large-scale coal mining has led to severe environmental pollution issues such as surface subsidence and gangue piling up. The gangue discharging amount has ranked the first in the world and coal mine enterprises are facing enormous discharging reduction pressure.
2019-7-30 e gangue backfilling GER (Figure 1(b)) is an innovative stability, such as timber cribs, dense pillar, gangue piling, andmasonrywalls[20,21].However,duetoissuesincluding low support force, large deformation, poor gob isolation, Coal gangue is a concrete material utilizing gangues as
2013-8-4 The piling of coal gangue takes up a lot of land and causes serious environmental problems． The source and basic properties of coal gangue is analyzed and the present situation of comprehensive utilization of coal gangue is described in this paper． Key words:
After mixing the coal gangue and cement with water, Ca(OH) 2 produced by the hydration of the calcareous material had a secondary reaction with the active SiO 2 and Al 2 O 3 in the coal gangue, forming the stable water-insoluble hydrated calcium silicate gel and hydrated calcium aluminate gel. The cross reaction, joint production, and mutual
2015-9-7 矸石山粒径分布及其渗透的非均匀性研究分析.pdf,致 谢 两年半的硕士研究生学习转眼即逝，在本论文即将完成之际，谨向我的 导师崔乃鑫教授致以最诚挚的谢意，崔老师优秀的做人品质，一丝不苟的工 作态度和执着的敬业精神，激励着学生在今后的学习和生活中不断攀登。
2012-3-20 In the storage and piling of coal, gangue, coal cinder, coal ashes, sandstone, lime soil or other materials easy to produce dusts, enclosure, covering and other measures shall be adopted to prevent and control dust pollution.
2012-7-23 Serial No． 522 October． 2012 ·综合述评· 现代矿业 MORDEN MINING 总 第 522 期 2012年 10 月第 10 期 我国矿山固体废物的资源化利用及处置* 张利珍1，2 赵恒勤1，2 马化龙1，2 谭秀民1，2 张 耀1，2 （ 1．
2018-2-1 Normalized construction method of coal gangue filling roadbed construction . China First Highway Engineering Co., Ltd. 18. YJGF237-2006. Normalized construction method of cement stabilization regeneration mixed material base layer. CCCC Second Highway Engineering Co.,
China is the world’s largest coal producer country. However, large-scale coal mining has led to severe environmental pollution issues such as surface subsidence and gangue piling up. The gangue discharging amount has ranked the first in the world and coal mine enterprises are facing enormous discharging reduction pressure.
CONE CRUSHER. A cone crusher is similar in operation to a gyratory crusher, with less steepness in the crushing chamber and more of a parallel zone between crushing zones.
2019-7-30 e gangue backfilling GER (Figure 1(b)) is an innovative stability, such as timber cribs, dense pillar, gangue piling, andmasonrywalls[20,21].However,duetoissuesincluding low support force, large deformation, poor gob isolation, Coal gangue is a concrete material utilizing gangues as
2016-6-14 LIAO S H, DU Y L, LIU Z H, et al. The pollution characteristics and risk assessment of heavy metals in gangue piling site to surrounding soil[J]. Environmental Engineering, 2014, 32(8):118-120(in Chinese). [26] 杨建,陈家军,王心义. 煤矸石堆周围土壤重
tailings: Residual gamma-radiation-rich, sandy waste remaining after extraction of uranium from mined ore.
2018-1-1 After mixing the coal gangue and cement with water, Ca[(OH).sub.2] produced by the hydration of the calcareous material had a secondary reaction with the active Si[O.sub.2] and [Al.sub.2][O.sub.3] in the coal gangue, forming the stable water-insoluble hydrated calcium silicate gel and hydrated calcium aluminate gel.
2017-11-9 coal gangue 煤矿石 coal tar epoxy 煤焦油环氧树脂 coarse aggregate 粗粒料 coarse ash tuff 粗粒凝灰岩 coarse fraction content 粗粒组含份量 coarse grained soil 粗粒土 coarse particle 粗粒，粗颗粒 coarse sand 粗砂 coastal habitat 海岸栖息地 coastline 海岸线
2012-7-23 Serial No． 522 October． 2012 ·综合述评· 现代矿业 MORDEN MINING 总 第 522 期 2012年 10 月第 10 期 我国矿山固体废物的资源化利用及处置* 张利珍1，2 赵恒勤1，2 马化龙1，2 谭秀民1，2 张 耀1，2 （ 1．
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