Mitigating Land Subsidence Damage Risk by Fly Ash Backfilling Technology: an Injection Case in Overburden of Coal Mining

2020 ◽  
Vol 30 (1) ◽  
pp. 655-661
Author(s):  
Yue Jiang ◽  
Rafal Misa ◽  
Anton Sroka ◽  
Yan Jiang
Keyword(s):  
Fly Ash ◽  
Coal Mining ◽  
Land Subsidence ◽  
Damage Risk

The Pre-Controlling Technology of Spontaneous Combustion in Gutter-Up Gob for Fully Mechanized Top-Coal Caving Face

2013 ◽  
Vol 634-638 ◽  
pp. 3688-3695 ◽  
Author(s):  
Yang Xiao ◽  
Shu Gang Li ◽  
Jun Deng ◽  
Xu Wang
Keyword(s):  
Carbon Dioxide ◽  
High Temperature ◽  
Fly Ash ◽  
Coal Mining ◽  
Spontaneous Combustion ◽  
Good Effect ◽  
Air Leakage ◽  
Coal Spontaneous Combustion ◽  
Liquid Carbon ◽  
Fire Extinguishing

In China, as popularizing the technology of fully mechanized top-coal mining and increasing the strength and depth of mining, the gutter-up gob can be formed. But the work of fire preventing and extinguishing for its coal spontaneous combustion is more complexity and difficulty. In this paper, based on geology parameters and mining practice for 93up12 fully mechanized top-coal caving face in Nantun coalmine, the form and character of gutter-up gob are analyzed. According to the hidden danger of high temperature for spontaneous combustion in the gob, we adopt the comprehension technologies of fire extinguishing and preventing which include sealing air-leakage, grouting, and injecting compound gel with fly-ash, foam of retarding oxidation, liquid carbon dioxide, and gas of nitrogen. By putting in practice the pre-controlling technology in gutter-up gob and monitoring data of target gases, it obtains a good effect and ensures the safety in production of the fully-mechanized top-coal caving face.

scholarly journals Identification of Land Subsidence and Management Using Cadastral Techniques, Mining Area of Raniganj, Barddhaman District, India

2016 ◽  
Vol 6 (2) ◽  
pp. 52
Author(s):  
Sonjay Mondal ◽  
Debashish Chakravarty ◽  
Jatisankar Bandyopadhyay ◽  
Kunal Kanti Maiti
Keyword(s):  
Coal Mining ◽  
Land Subsidence ◽  
Mining Area ◽  
Surface Structures ◽  
Waste Materials ◽  
Mining Activities ◽  
Agricultural Activities ◽  
Severe Damage ◽  
Concerted Effort ◽  
Impact Of Mining

Coal mining, open crest/underground adversely affects the Eco-system. Raniganj area known as mining zone, but several time natural hazards (land subsidence) occurs in the area, Subsidence in old workings leads to severe   damage to surface structures. it is very much important that suitable assessment studies to learn the potential adverse impact of mining on environmental ecosystem (flora, fauna). In the subsequent discussions an attempt has been made to clarify the coal mining activities and its outstanding impact on environment and agricultural activities. The study area region being the foremost coal producing region country, it’s also ranked high in the list of environmentally degraded areas, in mining area have seen that  waste materials are usually stacked as huge dumps in  surroundings. After that those dumps were coupled with coal dumps, because this significant effect impact on land.  The environmental awareness is given our society brought life from mining area another concerted effort for reclamation of the subsided land.

scholarly journals Land Subsidence Related to Coal Mining in China Revealed by L-Band InSAR Analysis

2020 ◽  
Vol 17 (4) ◽  
pp. 1170
Author(s):  
Liping Zheng ◽  
Lin Zhu ◽  
Wei Wang ◽  
Lin Guo ◽  
Beibei Chen
Keyword(s):  
Synthetic Aperture Radar ◽  
Coal Mining ◽  
Land Subsidence ◽  
Ordos Basin ◽  
Coal Mines ◽  
Synthetic Aperture ◽  
Interferometric Synthetic Aperture Radar ◽  
Geological Disasters ◽  
Land Deformation ◽  
The Ordos Basin

Geological disasters, including ground deformation, fractures and collapse, are serious problems in coal mining regions, which have threatened the sustainable development for local industry. The Ordos Basin is most known for its abundant coal resources. Over-mining the underground coal resources had induced land deformation. Detecting the evolution of the land deformation features and identifying the potential risk are important for decision-makers to prevent geological disasters. We analyzed land subsidence induced by coal mining in a 200 km 2 area in the Ordos Basin for the time period 2006–2015. ALOS-1 PALSAR images from December 2006 to January 2011 and ALOS-2 PALSAR-2 images from December 2014 to July 2015, optical remotely sensed images and coal mining information were collected. The small baseline subset interferometric synthetic aperture radar (SBAS-InSAR) method and differential interferometric synthetic aperture radar (D-InSAR) method, GIS and statistical analysis were adopted. Results show that the maximum subsidence rate and cumulative subsidence along the line of sight (LOS) were −65 mm/year and −246 mm, respectively, from December 2006 to January 2011. The maximum cumulative subsidence was −226 mm from December 2014 to July 2015. The new boundary of the mining goafs from 2014 to 2015 and the most dangerous risk region were mapped. Moreover, the effect of large-scale mining coal, with the production volume exceeds 1.2 million tons per year, with the operation time more than 20 years on land subsidence was found greater than small and medium-scale coal mines and reached −59 mm/year. The recently established small-sized and medium-sized coal mines show high land subsidence. This study will contribute to better understand the land subsidence process in mining region and provide scientific support for government to prevent land subsidence.

Synergistic effects of biochar and processed fly ash on bioavailability, transformation and accumulation of heavy metals by maize (Zea mays L.) in coal-mining contaminated soil

Chemosphere ◽  
2020 ◽  
Vol 240 ◽  
pp. 124845 ◽  
Author(s):  
Mehr Ahmed Mujtaba Munir ◽  
Guijian Liu ◽  
Balal Yousaf ◽  
Muhammad Ubaid Ali ◽  
Qumber Abbas ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Zea Mays ◽  
Fly Ash ◽  
Coal Mining ◽  
Contaminated Soil ◽  
Zea Mays L ◽  
Synergistic Effects

Data fusion for investigating land subsidence and coal fire hazards in a coal mining area

2001 ◽  
Vol 22 (6) ◽  
pp. 921-932 ◽  
Author(s):  
A. Prakash ◽  
E. J. Fielding ◽  
R. Gens ◽  
J. L. Van Genderen ◽  
D. L. Evans
Keyword(s):  
Data Fusion ◽  
Coal Mining ◽  
Land Subsidence ◽  
Mining Area ◽  
Fire Hazards ◽  
Coal Mining Area ◽  
Coal Fire

An Environmentally Sound Usage of both Coal Mining Residue and Sludge

2011 ◽  
Vol 183-185 ◽  
pp. 595-599 ◽  
Author(s):  
Kui Mei Qian ◽  
Li Zhang ◽  
Li Ping Wang
Keyword(s):  
Fly Ash ◽  
Arbuscular Mycorrhiza ◽  
Coal Mining ◽  
Experimental Research ◽  
Toxic Element ◽  
Coal Gangue ◽  
Mixture Ratio ◽  
Arbuscular Mycorrhiza Fungi ◽  
Environmentally Sound ◽  
Wasteland Reclamation

This study reported the test done on coal gangue-fly ash-sludge mixture for mine wasteland reclamation in pot experiments. According to the characteristic of coal gangue, fly ash and sludge, they were mixed as the complex substrate for reclamation of mine wasteland; meanwhile, arbuscular mycorrhiza fungi (AMF) was also introduced to the reclamation of mine wasteland. The experimental research of the complex substrate and AMF in mine wasteland reclamation was conducted. The results indicated that coal gangue-fly ash-sludge mixture ratio studies revealed that 2: 6: 2 fly ash-coal gangue-sludge mixtures was the optimum mixture ratio that minimized toxic element and provided sufficient nutrients. It resulted that appropriate ratio of the three composite can effectively promote the reclamation, and increase the nutrients absorption of plants, providing a reference for ecological utilization of coal gangue, and fly ash and sludge. In addition, inoculation with AMF in the presence of sludge in mining reclamation was essential for the promotion of plant absorption of nutrients.

A GPS study of land subsidence in the Petrosani (Romania) coal mining area

2015 ◽  
Vol 80 (2) ◽  
pp. 797-810 ◽  
Author(s):  
A. Muntean ◽  
V. Mocanu ◽  
B. Ambrosius
Keyword(s):  
Coal Mining ◽  
Land Subsidence ◽  
Mining Area ◽  
Coal Mining Area
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