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.

scholarly journals Dynamic Changes in Carbon Sequestration from Opencast Mining Activities and Land Reclamation in China’s Loess Plateau

2019 ◽  
Vol 11 (5) ◽  
pp. 1473 ◽  
Author(s):  
Boyu Yang ◽  
Zhongke Bai ◽  
Yingui Cao ◽  
Feng Xie ◽  
Junjie Zhang ◽  
...  
Keyword(s):  
Land Use ◽  
Carbon Sequestration ◽  
Land Reclamation ◽  
Arable Land ◽  
Mining Area ◽  
Downward Trend ◽  
Total Carbon ◽  
Opencast Mining ◽  
Mining Activities ◽  
Significant Downward Trend

Opencast coal mining causes serious damage to the natural landscape, resulting in the depletion of the carbon sequestration capacity in the mining activity. There are few studies on the variation of carbon sequestration capabilities caused by land use changes in opencast mining areas. This paper uses six images were used to quantify the changes in land use types from 1986 to 2015 in the Pingshuo mining area in northwest China. At the same time, used statistical analysis and mathematical models to study soil and vegetation carbon sequestration. Results indicate that the total carbon sequestration exhibits a significant downward trend from 4.58 × 106 Mg in 1986 to 3.78 × 106 Mg in 2015, with the decrease of soil carbon sequestration accounting for the largest proportion. The carbon sequestration of arable land accounted for 51% of the total carbon sequestration in the mining area, followed by grassland (31%) and forestland (18%). Land reclamation contributed to the greatest increase in carbon sequestration of arable land from 17,890.15 Mg (1986) to 27,837.95 Mg (2015). Additionally, the downward trend in the carbon sequestration capacity of the mining ecosystem was mitigated after 2010 as the positive effects of land reclamation gradually amplified over time and as the mining techniques were greatly optimized in recent years in the Pingshuo mining area. Thus, terrestrial carbon sequestration can be improved through land reclamation projects and optimized mining activities. These results can help guide the utilization of reclaimed land in the future.

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.

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.

Reclamation patterns vary carbon sequestration by trees and soils in an opencast coal mine, China

CATENA ◽  
2016 ◽  
Vol 147 ◽  
pp. 404-410 ◽  
Author(s):  
Ye Yuan ◽  
Zhongqiu Zhao ◽  
Zhongke Bai ◽  
Huaiquan Wang ◽  
Yingzhe Wang ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Coal Mine ◽  
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.

scholarly journals Assessment of Land Reclamation Benefits in Mining Areas Using Fuzzy Comprehensive Evaluation

2020 ◽  
Vol 12 (5) ◽  
pp. 2015 ◽  
Author(s):  
Xueyi Yu ◽  
Chi Mu ◽  
Dongdong Zhang
Keyword(s):  
Coal Mine ◽  
Land Reclamation ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Evaluation Criteria ◽  
Fuzzy Comprehensive Evaluation ◽  
Mining Area ◽  
Scoring Method ◽  
Land Type ◽  
Mining Areas

Land reclamation plays a vital role in the ecological improvement and economic development of mining regions. This study aims to conduct a preliminary discussion on the evaluation content, evaluation methods, and evaluation indicators of land reclamation benefits in mining areas. Using fuzzy comprehensive evaluation (FCE) method, land reclamation was assessed. After compiling a model of the land reclamation influencing factors, an evaluation index of land reclamation benefit in the mining area was constructed using the land reclamation monitoring data for the northern part of the mining area over the last decade. In addition, an expert scoring method and a traditional evaluation model were used to estimate the comprehensive benefits of land reclamation at Hanjiawan coal mine in Shendong mining area. Land reclamation markedly improved the land type within the mining region and decreased the amount of damaged land, including subsided and occupied land. Moreover, land reclamation improved the available land area such as agricultural and construction land. The proposed model obtained an overall 63% increase in the land reclamation area. Different degrees of ecological, economic, and social benefits of Hanjiawan coal mine were observed; however, the ecological benefits were the most significant, with a growth rate of 56%. Based on the evaluation criteria, all benefits of the mining area after reclamation were good. Over time, land reclamation will offer greater comprehensive benefits to the mining area. Furthermore, this method can be used for precise evaluation of comprehensive benefits after land reclamation, and the assessment results will provide a reference basis for sustainable development of the mining area.

The Land Ecological Restoration of Subsidence Area in Panji Coal Mine

2011 ◽  
Vol 414 ◽  
pp. 126-131
Author(s):  
Han Zhou Qiu ◽  
Xiao Ling Jin ◽  
Xi Jun Hu
Keyword(s):  
Coal Mine ◽  
Land Reclamation ◽  
Rapid Development ◽  
Social Economy ◽  
Mining Area ◽  
Yield Reduction ◽  
Land Resource ◽  
Crop Failure ◽  
Ecological Economic ◽  
Subsidence Area

Panji is rich in coal reserves. The rapid development of social economy and increasing mining scales cause the subsided land, bulk deposition of solid waste, soil, water and air pollution, crop yield reduction or crop failure and ecological deterioration, which endanger the living and development of people in the mining area. Based on the current situation of subsidence area and evaluation of land reclamation potentiality, this paper puts forward the establishment of land ecological economic pattern and the application to ecological project to improve land condition, cultivate land resource potentiality and restore the service function and species diversity of ecological system in the subsidence area of Panji Coal Mine in order to provide reference for ecological, economic and social sustainable development in Panji.

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