Identification of land reclamation stages based on succession characteristics of rehabilitated vegetation in the Pingshuo opencast coal mine

2022 ◽  
Vol 305 ◽  
pp. 114352
Author(s):  
Yanjun Guan ◽  
Juan Wang ◽  
Wei Zhou ◽  
Zhongke Bai ◽  
Yingui Cao
Keyword(s):  
Coal Mine ◽  
Land Reclamation ◽  
Opencast Coal Mine

Shelf life of stock-piled topsoil of an opencast coal mine

1997 ◽  
Vol 24 (1) ◽  
pp. 24-30 ◽  
Author(s):  
N.K. KUNDU ◽  
M.K. GHOSE
Keyword(s):  
Shelf Life ◽  
Coal Mine ◽  
Land Reclamation ◽  
Storage Period ◽  
Abandoned Mines ◽  
Soil Profiles ◽  
Opencast Coal Mine ◽  
Physico Chemical ◽  
Year 2000 ◽  
Overburden Dumps

Topsoil is essential to abandoned mines and has to be stock-piled separately for post-mining land reclamation. If the storage period exceeds the 'shelf life' of the topsoil, it cannot be preserved by technical reclamation only. Opencast coal mining production in India is predicted to increase from the present level of 180 million tonnes per year to approximately 256 million tonnes per year by the year 2000. At that time about 60 km2 of land per year would be damaged by direct coal mines and 75 km2 per year would be affected by external overburden dumps and topsoil dumps. A large opencast coal mine was studied to evaluate the effect of stock-piling topsoil. Soil characteristics of soil dumps of six different ages (1, 3, 4, 6, 9 and 10 years old) were compared with those of surrounding unmined sites. Soil profiles were found to change greatly with age. Physico-chemical characteristics of soil dumps were found to deteriorate with respect to unmined soil. It was observed that, as the age of soil dumps increased from one to 10 years, the concentrations of suitable plant growth nutrients in soil gradually decreased and, after six years, the soils were found to be stagnant. This may be considered to be the 'shelf life' of topsoil. Biological reclamation must be adopted to preserve the topsoil if the storage period exceeds the shelf life period. The methodology provides guidelines for assessing the shelf life of topsoil in other areas.

Study on Soil Carbon Sequestration in the Heidaigou Opencast Coal Mine

2013 ◽  
Vol 726-731 ◽  
pp. 204-208
Author(s):  
Ze Zhen Jiao ◽  
Jin Man Wang ◽  
Rui Xuan Yang ◽  
Xin Feng Li
Keyword(s):  
Carbon Sequestration ◽  
Soil Carbon ◽  
Coal Mine ◽  
Land Reclamation ◽  
Mining Area ◽  
Soil Bulk Density ◽  
Opencast Mining ◽  
Carbon Density ◽  
Opencast Coal Mine ◽  
Sensing Technology

The carbon sequestration of Heidaigou opencast mining area was calculated by using carbon density method based on remote sensing technology, combined field surveys and data measured indoor. Soil bulk density, soil organic matter and other soil properties of the 63 soil samples in the Heidaigou mining area were measured. The results indicated the following conclusions. (1) The carbon sequestration of Heidaigou opencast coal mine area was 4,651,623.30 t in 2010. (2) There was a positive correlation between soil carbon density and the age of land reclamation. (3)After reclamation the carbon sequestration of Heidaigou opencast coal mine increased by 239,748.61 t. So the potential for carbon sequestration is great in this area. The results indicate that the mining area land reclamation can improve soil carbon acquisition capability and maintain the ecological balance of carbon cycle.

The Change Law of RMSs Characteristics in Grassland Opencast Coal Mine Dump of China

2013 ◽  
Vol 726-731 ◽  
pp. 4831-4837
Author(s):  
Rui Xuan Yang ◽  
Jin Man Wang
Keyword(s):  
Organic Matter ◽  
Coal Mine ◽  
Land Reclamation ◽  
Ph Value ◽  
Soil Bulk Density ◽  
Available P ◽  
Land Resources ◽  
Total N ◽  
Opencast Coal Mine ◽  
Mine Dump

With construction and development of opencast coal mine, its damage to the land resources and ecological environment in mine area become increasingly serious. Thus, assessing change law of reclaimed mine soils is essential for land reclamation and ecological restoration in ecological fragile area. Is this study, soil Bulk Density, Organic matter, Available P, Available K, Alkali-hydrolyzed N, Total N, pH value, Electrical Conductivity was analyzed in different sampling sites with different reclamation age and an unmined site as a reference in Inner Mongolia mining waste dump. The soil Organic matter, Available P, Available K, Alkali-hydrolyzed N and Total N increased with reclamation age, all the soil factors gradually arrived at their content in original landform. A model of RMSs characteristics was constructed using index sum method. RMSs characteristics had been improved in study area, and gradually arrived at the original landform level.

The Topsoil Quality Variation Under Different Reclamation Modes in Pasture Opencast Coal Mine of China

2012 ◽  
Vol 518-523 ◽  
pp. 4790-4795 ◽  
Author(s):  
Meng Zhang ◽  
Jin Man Wang ◽  
Zhong Ke Bai ◽  
Chun Lei Liu
Keyword(s):  
Ecological Restoration ◽  
Coal Mine ◽  
Land Reclamation ◽  
Field Investigation ◽  
Scientific Basis ◽  
N Fertilization ◽  
Quality Level ◽  
Mine Area ◽  
Opencast Coal Mine ◽  
Quality Variation

As the lack of topsoil resources, and the shortage of water resources, the ecological environment is extremely fragile in the pasture opencast coal mine area of China. Therefore, that the way to achieve the most efficient use of the limited topsoil resources in pasture area, plays a crucial role in land reclamation and ecological restoration. East II opencast coal mine in Datang, Inner Mongolia was taken as an example to analyze topsoil quality variation under different dump platform and slope reclamation modes in the pasture opencast coal mine area. The field investigation method was used in this paper. The study found that the mode "covering topsoil, overlying grass, grass grid, N fertilization, planting vanguard vegetation" in dump platform and "covering topsoil, overlying grass, grass grid, planting vanguard vegetation " in dump slope can lead to the best topsoil quality, though it still less than the original landscape topsoil quality level. The research can provide technical support and scientific basis for the pasture reclamation and ecological restoration.

scholarly journals Research on Identification of Land Damage Types and Analysis of Damage Process in Opencast Coal Mine of Steppe

2020 ◽  
Vol 194 ◽  
pp. 04032
Author(s):  
Yan Jiancheng ◽  
Liu Yong ◽  
Gao Junhai
Keyword(s):  
Land Cover ◽  
Coal Mine ◽  
Land Reclamation ◽  
Mining Area ◽  
Land Occupation ◽  
Damage Area ◽  
Opencast Coal Mine ◽  
Damage Coefficient ◽  
Damage Process ◽  
Damage Types

Aiming at the situation of land damage caused by large Opencast Coal Mine in steppe, this paper took Borshil Opencast Coal Mine in Hulunbuir as the research object, identified the types of land damage caused by Opencast Coal Mine in the last 20 years, analysed the space-time sequence and quantity of land damage process, and calculated the coefficient of land damage based on the types of damage. We found that, since 1998 to 2018, the area of land improper excavation and land cover occupation increased year by year in Borshil Opencast Coal Mine, the area of land improper excavation changed inconspicuously between years, and the area of land cover occupation decreased between years; the area of land occupation increased first and then remained unchanged basically, and the proportion decreased from 36.5% to 16.2%. By 2018, the total area of land damage in Borshil Opencast Coal Mine was 5150.52 hm2, and the ratio of land improper excavation to land cover occupation to land piled up was about 3:5:2. In addition, the land damage coefficient of Borshil Opencast Coal Mine increased first and then decreased, reaching the maximum of 0.6425 hm2/104t in 2011, and it was 0.196hm2/104t in 1998-2018. The data combined with coal mine output can predict the future land damage area of mining area, and provide data support for land reclamation potential survey. It can also provide reference for the implementation of relevant national policies and plans.

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