Suitability assessment on land reclamation of subsided land by coal mining in plain area with high groundwater level

2014 ◽  
pp. 125-132
Keyword(s):  
Coal Mining ◽  
Groundwater Level ◽  
Land Reclamation ◽  
Plain Area ◽  
Suitability Assessment

scholarly journals A new approach to increase land reclamation rate in coal mining subsidence area: A case study of Guqiao Coal Mine, China

2021 ◽  
Author(s):  
Gensheng LI ◽  
Jianxuan Shang ◽  
Zhenqi Hu ◽  
Dongzhu Yuan ◽  
Pengyu Li ◽  
...  
Keyword(s):  
Coal Mining ◽  
Coal Mine ◽  
Land Reclamation ◽  
Water Area ◽  
Land Area ◽  
Reclaimed Land ◽  
Land Protection ◽  
Mining Areas ◽  
Concurrent Mining And Reclamation ◽  
Coal Mining Subsidence

Underground coal mining will inevitably cause land ponding in high groundwater table, which will affect the land sustainable development. However, the traditional reclamation (TR) is poor in land rate. Thus, finding a suitable reclamation approach is crucial to alleviate the conflicts between coal exploitation and land protection. In this paper, taking Guqiao Coal Mine of China was seriously affected by mining-induced ponding as an example. Firstly, dynamic distribution of surface subsidence and land damage from 2007 to 2017 was revealed base on concurrent mining and reclamation (CMR). Second, the land-water layout of five reclamation schemes (no reclamation, TR, CMR I, CMR II and CMR III) were simulated. Then, and the dynamic filling elevation model and filling thickness model were constructed. Finally, the sequence of earthwork allocation was optimized. The results revealed that: 1) reclaimed land area: CMR III > CMR II > CMR I > TR > no reclamation; 2) The digging depth is directly proportional to earthwork volume and land area, and inversely proportional to water area, but with increase of digging depth, the increase in the reclaimed land area relatively slowed down; 3) CMRs had reclaimed 426.31~637.82 ha and 259.62~471.13 ha more than the no reclamation and TR respectively. Compared with the no reclamation and TR, CMRs can increase the proportion of reclaimed land by 33.77~50.52% and 20.57~37.32% respectively. The research results provide a reference to increase the reclamation rate of mining areas in the high phreatic table.

scholarly journals DETECTING THE AREA DAMAGE DUE TO COAL MINING ACTIVITIES USING LANDSAT MULTITEMPORAL (Case Study: Kutai Kartanegara, East Kalimantan)

2018 ◽  
Vol 14 (2) ◽  
pp. 151
Author(s):  
NFn Suwarsono ◽  
Nanik Suryo Haryani ◽  
Indah Prasasti ◽  
Hana Listi Fitriana ◽  
M. Priyatna ◽  
...  
Keyword(s):  
Change Detection ◽  
Coal Mining ◽  
Coal Mine ◽  
Vegetation Index ◽  
Detection Method ◽  
Land Reclamation ◽  
Environmental Damage ◽  
Mining Activities ◽  
Landsat Data ◽  
East Kalimantan

Coal is one of the most mining commodities to date, especially to supply both national and international energy needs. Coal mining activities that are not well managed will have an impact on the occurrence of environmental damage. This research tried to utilize the multitemporal Landsat data to analyze the land damage caused by coal mining activities. The research took place at several coal mine sites in East Kalimantan Province. The method developed in this research is the method of change detection. The study tried to know the land damage caused by mining activities using NDVI (Normalized Difference Vegetation Index), NDSI (Normalized Difference Soil Index), NDWI (Normalized Difference Water Index) and GEMI (Global Environment Monitoring Index) parameter based change detection method. The results showed that coal mine area along with the damage that occurred in it can be detected from multitemporal Landsat data using NDSI value-based change detection method. The area damage due to coal mining activities  can be classified into high, moderate, and low classes based on the mean and standard deviation of NDSI changes (ΔNDSI). The results of this study are expected to be used to support government efforts and mining managers in post-mining land reclamation activities.

scholarly journals CONCEPTIONS OF LAND RECLAMATION IN THE POLISH OPENCAST MINING

1997 ◽  
Vol 1 ◽  
pp. 26
Author(s):  
Tadeusz Chrzan ◽  
Henryk Greinert
Keyword(s):  
Coal Mining ◽  
Brown Coal ◽  
Agricultural Land ◽  
Land Reclamation ◽  
Surface Mining ◽  
Cultivated Plants ◽  
Opencast Mining ◽  
Direct Introduction ◽  
Mining Areas ◽  
Humus Soil

In the paper the influence of surface mining on the environment is presented. The sizes of mining areas and depression funnels has been shown. Also are presented the amount of cover materials and the quantity of water pumped out from the mines in five regions of brown coal mining in Poland.Various conceptions of land reclamation are discussed, from the method of pioneer vegetation in the years of 1950 - 1970, trough selective excavation of the humus soil in the years 1970 - 1980, to conception of the direct introduction of the final type of vegetation.In the lost part of the paper three models of agricultural land remediation are discussed, as well as the yields of the cultivated plants on recultivated former mining areas.

scholarly journals STUDY OF THE PROGRESS OF SEAWATER INTRUSION WITHIN A PLAIN AREA OF RHODOPE PREFECTURE

2004 ◽  
Vol 36 (4) ◽  
pp. 2057 ◽  
Author(s):  
Φ. Πλιάκας ◽  
I. Διαμαντής ◽  
A. Καλλιώρας ◽  
Χ. Πεταλάς
Keyword(s):  
Electrical Conductivity ◽  
Grain Size ◽  
Seawater Intrusion ◽  
Groundwater Level ◽  
Specific Electrical Conductivity ◽  
Chemical Analyses ◽  
Conductivity Measurements ◽  
Groundwater Level Fluctuations ◽  
Plain Area ◽  
Groundwater Samples

This paper investigates the progress of seawater intrusion within the plain area of Xylagani - Imeros, in SW part of Rhodope Prefecture, as well as the suitability of groundwater for several purposes, after qualitative valuation of groundwater samples from selective wells of the study area. The conclusions also include some managerial suggestions for the confrontation of seawater intrusion. The investigation in question took place between 1994-1997 and 2002-2003, and involves the installation of piezometric wells, geoelectric sounding measurements, grain size analyses, monitoring of the groundwater level fluctuations in selective wells, specific electrical conductivity measurements and chemical analyses of water samples from selective wells of the study area.

scholarly journals Calculation of Residual Surface Subsidence Above Abandoned Longwall Coal Mining

2020 ◽  
Vol 12 (4) ◽  
pp. 1528 ◽  
Author(s):  
Ximin Cui ◽  
Yuling Zhao ◽  
Guorui Wang ◽  
Bing Zhang ◽  
Chunyi Li
Keyword(s):  
Coal Mining ◽  
Longwall Mining ◽  
Land Reclamation ◽  
Surface Subsidence ◽  
Mining Subsidence ◽  
First Year ◽  
Longwall Coal Mining ◽  
The Stability ◽  
Ecological Reconstruction

Exhausted or abandoned underground longwall mining may lead to long-term residual subsidence on surface land, which can cause some problems when the mined-out land is used for construction, land reclamation and ecological reconstruction. Thus, it is important to assess the stability and suitability of the land with a consideration of residual surface subsidence. Assuming a linear monotonic decrease in the annual residual surface subsidence, the limit of the sum of the annual residual subsidence factor, and continuity between surface subsidence in the last year of the weakening period and the residual surface subsidence in the first year, we establish a model to calculate the duration of residual subsidence and the annual residual surface subsidence factor caused by abandoned longwall coal mining. The duration of residual surface subsidence increases with the increase in mining thickness as well as the factor of extreme residual subsidence. The proposed method can quantitatively calculate the annual residual subsidence, the accumulative residual subsidence, and the potential future accumulative residual subsidence. This approach can be used to reasonably evaluate the stability and suitability of old mining subsidence areas and will be beneficial for the design of mining subsidence land reclamation and ecological reconstruction.

scholarly journals The Problems of Legal Regulation of the Land Reclamation after the Illegal Coal Mining by the “Black Diggers” (the Kemerovo region example)

2020 ◽  
Vol 174 ◽  
pp. 02029
Author(s):  
Vitaly Shelestukov ◽  
Roman Drapezo ◽  
Roman Islamov
Keyword(s):  
Coal Mining ◽  
Land Reclamation ◽  
Mining Industry ◽  
Legal Regulation ◽  
Illegal Activity ◽  
Judicial Practice ◽  
Natural Minerals ◽  
Long Time ◽  
Law Enforcement Officials ◽  
The Russian Federation

The article deals with the issues of the legal “irregularity” of criminal and material responsibility of the “black diggers” for the illegal production of natural resources in the territory of the Kuzbass. The schemes of production and selling the coal are very different. That is why it is rather difficult to consider them in terms of criminal, arbitration, and administrative processes, especially by considering the issues of reclaiming the lands broken by such illegal activity. This is evidenced by the limited judicial practice of arbitration courts and courts of law of the Kuzbass. There is also no similar practice in other territorial subjects of the Russian Federation. Thus, there is a necessity in urgent developing of the methodical recommendations for the law enforcement officials on the calculation and compensation for the damage, considering the escalating statistical data on the illegal activity of the “black diggers”. Since the production and land reclamation caused by the coal mining are technologically interconnected, there must be an assigned surveillance of the use of a fund and the order of land reclamation to the prosecutor’s office on the surveillance of respecting the lawfulness in the coal-mining industry. These actions are provided for the coal-mining enterprises. For a long time, the “black diggers” have been producing the natural minerals which are the property of the state and they have also been able to escape the attention of the Russian legislation.

scholarly journals Application of Roadway Backfill Mining in Water-Conservation Coal Mining: A Case Study in Northern Shaanxi, China

2019 ◽  
Vol 11 (13) ◽  
pp. 3719 ◽  
Author(s):  
Yihe Yu ◽  
Liqiang Ma
Keyword(s):  
Water Resources ◽  
Coal Mining ◽  
Groundwater Level ◽  
Water Conservation ◽  
Coal Pillar ◽  
Normal Growth ◽  
Mining Area ◽  
Backfill Mining ◽  
Northern Shaanxi ◽  
The Stability

The mining induced subsidence and strata deformation are likely to affect the stability of the aquiclude, resulting in loss of water resources in the mining area. In order to reduce the disturbance of coal mining to the overlying strata and to preserve the water resources in the coal mining area, the roadway backfill mining (RBM) method was trialed in Yuyang coal mine in Northern Shaanxi, China. Based on pressure arch theory and ultimate strength theory, a mechanical model was developed to analyze the stability of coal pillars. Then the maximum number of vacant roadways between the mining face and the backfilling face was determined according to the stability of coal pillar and filling body. The method to calculate aquiclude subsidence and deformation was also proposed. Furthermore, as indicated by FLAC3D numerical simulations, the maximum tensile stress subjected by the aquiclude was 0.14 MPa, which is smaller than its tensile strength; the horizontal deformation was 0.24 mm/m, which is also smaller than the critical deformation of failure. Field monitoring data demonstrated a maximum of 2.76 m groundwater level drop in the mining area after mining. The groundwater level was determined to be 4.45~10.83 m below surface, ensuring the normal growth of surface vegetation and realizing the water-conservation coal mining (WCCM).

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