Morphological Changes due to Anthropogenic Interferences in Gendol River Valley, Merapi Volcano

This research aims to identify the morphological changes in Gendol river, Merapi volcano. After the eruption 2010, Gendol river filled up by pyroclastic materials, then utilized as mining area. As the volcanic materials are abundance in Gendol river, sand mining activities are dominant, causing antrophogenic interferences that changes the morphology of Gendol valley. In this study, the morphological changes is measured by terrestrial survey, aerial mapping, and materials analysis through petrographic and granulometric analysis. Aerial mapping was conducted in February and August 2019 in order to identify the dynamic changes during 6 months observation. Vertical changes is found in the active mining zone, in western-side of research area, while horizontal changes was found in eastern-side. The comparison of widening and narrowing valley is 13:1 due to horizontal changes. Result of petrographic analysis showes that three different sampling locations originated from similar provenance, which is undissected arc provenance but may differ in period of sedimentation. Grain material found in research are categorized as suitable material for mining with the 0,733 mm grain size. However, the mining activities should be aware of material availability to minimize the riverbank failure.

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Surface Water Quality Assessment from a Mining Area. Case study, Groapa Burlacu lake, Targu Ocna, Romania

Revista de Chimie ◽

10.37358/rc.19.10.7622 ◽

2019 ◽

Vol 70 (10) ◽

pp. 3678-3680

Author(s):

Alina Cochiorca ◽

Narcis Barsan ◽

Florin Marian Nedeff ◽

Ion Sandu ◽

Emilian Florin Mosnegutu ◽

...

Keyword(s):

Water Quality ◽

Surface Water ◽

Surface Water Quality ◽

Water Quality Assessment ◽

Mining Area ◽

Physical Parameters ◽

Mining Activities ◽

Quality Of Water ◽

Nacl Concentration ◽

Water Ph

This paper presents a study on assessment of water quality. According to a study, mining activities have a significant impact on water quality (lakes, surface water and groundwater), which has become a major problem globally. Due to mining and exploitation processes, lakes can be formed around these mines. Also, these lakes have been formed around the world and are steadily increasing. The purpose of this study is to watch the quality of water from the area around mining activities. This study refers to the, Groapa Burlacu lake around the mining exploitation Targu Ocna, Romania. This lake was formed on the northern bottle of the massive salt, strongly affected by the underground activities. Sampling for the determination the concentrations of Cl- and NaCl from the studied area was made at different depths (0 m, -5 m, -10 m, -15 m, -20 m, -25 m, -30 m, -35 m -40 m). Besides these concentrations, physical parameters of the water (pH, turbidity, electrical conductivity, dissolved oxygen and temperature) were also measured. To determine the physical parameters in the monitored area, sampling was done from four different points of the area and then put together for analysis. These parameters were measured on site using portable equipment. The data on the analyzed concentrations indicate that at depths of less than 5.0 m, the NaCl concentration values are more than 250 g/L.

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Hydrogeochemical Evolution and Control Mechanism of Underground Multiaquifer System in Coal Mine Area

Geofluids ◽

10.1155/2020/8820650 ◽

2020 ◽

Vol 2020 ◽

pp. 1-15

Author(s):

Qiding Ju ◽

Yu Liu ◽

Youbiao Hu ◽

Yuquan Wang ◽

Qimeng Liu ◽

...

Keyword(s):

Cation Exchange ◽

Mine Water ◽

Control Mechanism ◽

Water Inrush ◽

Pyrite Oxidation ◽

Mining Area ◽

Carbonate Dissolution ◽

Mining Activities ◽

Hydrogeochemical Evolution ◽

And Control

Mining activities interfere into the natural groundwater chemical environment, which may lead to hydrogeochemical changes of aquifers and mine water inrush disasters. The study of hydrogeochemical evolution processes of underground aquifers is helpful to the prevention and control of mine water inrush. The results show that the study area is mainly impacted by four hydrogeochemical processes: dissolution, cation exchange, desulfurization and reduction, and pyrite oxidation. The Cenozoic aquifers are dominated by carbonate dissolution and desulfurization. The Permian aquifers are impacted mainly by cation exchange and sulfate dissolution, followed by pyrite oxidation. The Carboniferous aquifers are mainly impacted by dissolving sulfate, followed by pyrite oxidation and cation exchange. The hydrogeochemical evolution of the aquifers was controlled by mining activities and tectonic changes, and a certain regularity in space. For the Cenozoic aquifers, sulfate dissolution and cation exchange increase from west to east, and desulfurization weakens. For the Permian aquifers, cation exchange and sulfate dissolution are stronger near synclines and faults, pyrite oxidation is enhanced, and desulfurization decreases from the middle to the east of the mining area. For the Carboniferous aquifers, there is a higher dissolution of rock salt, pyrite oxidation, and cation exchange from west to east, and the desulfurization effect weakens.

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

Energy and Environment Research ◽

10.5539/eer.v6n2p52 ◽

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.

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Study Amendment of Post-Field Classification of Illegal Gold in Kolaka Regency, Southeast Sulawesi Province

E3S Web of Conferences ◽

10.1051/e3sconf/20187306016 ◽

2018 ◽

Vol 73 ◽

pp. 06016 ◽

Cited By ~ 1

Author(s):

eka suardana Alfan ◽

Muhammad Fuad

Keyword(s):

Soil Quality ◽

Soil Compaction ◽

Soil Chemistry ◽

Mining Area ◽

Mining Activities ◽

Conservation Area ◽

Nature Tourism ◽

Illegal Mining ◽

Top Soil

Illegal mining activities in the kolaka regency of Southeast Sulawesi province is one of the mines whose location is in the conservation area of nature tourism park. Mining by means of dredging with an average depth of up to 15 meters and indiscriminate stockpiling after mining, using mercury chemicals (hg) so make the land damaged and unproductive, changes in the landscape and damage the physical properties of the soil that makes the soil pH becomes sour, so as to make soil quality low, dust texture increased and soil compaction that makes soil chemistry decreased, so can not support the growth of plants around the mine, the occurrence of heavy erosion and loss of top soil. the mining area reaches 50 hectares which damages the soil quality and removes vegetation around the area.

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Seismic Exploration of the River Sand Mining Area

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/252/5/052028 ◽

2019 ◽

Vol 252 ◽

pp. 052028

Author(s):

Jian Zhang ◽

Lei Fang ◽

Yanhai Wang ◽

Jun Mei

Keyword(s):

Mining Area ◽

Seismic Exploration ◽

Sand Mining ◽

River Sand

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Long-term Changes in the Surface Area in the Surroundings of the Open-cast Brown Coal Mine in Bełchatów (Poland)

10.5194/egusphere-egu2020-13862 ◽

2020 ◽

Author(s):

Natalia Bugajska ◽

Wojciech Milczarek ◽

Anna Kopeć ◽

Dariusz Głąbicki

Keyword(s):

Brown Coal ◽

Coal Mine ◽

Mining Area ◽

Research Area ◽

Open Pit ◽

Significant Activity ◽

Satellite Radar ◽

The Difference ◽

October 17 ◽

Open Cast

Satellite radar interferometry, in particular time series techniques, allow to monitor the activity of the surface of vast areas, making them a complement and alternative to traditional geodetic methods, the use of which in such areas is often associated with significant restrictions. The above-mentioned areas definitely include open-cast mines, among others the analyzed Be&#322;chat&#243;w Brown Coal Mine (Poland). During the studies, 216 satellite images acquired from the Sentinel-1A and Sentinel-1B satellites (path 175) for the period from October 17, 2014 to June 11, 2019 were used. Due to the fact that the research area was on two adjacent stages, it was necessary to combine data for the correct performance of the calculation process. The use of the SBInSAR imaging processing algorithm allowed to generate 839 interferograms carrying information about the difference in interferometric phases between pairs of images which satisfy the condition of the boundary size of the spatial and temporal base. As a consequence, it allowed to determine the displacements in the direction of the electromagnetic beam LOS (Line of Sight) that occurred in the mining area during this period. Based on the carried out calculations, significant activity of the area around the open-pit mine was perceived. Dumping ground were analyzed - external Szczerc&#243;w Fields and internal Be&#322;chat&#243;w Fields, as well as excavations where mineral extraction is currently taking place. Continuous deformations (depressions and uplifts) associated with intensively conducted mining exploitation and complicated geological and mining conditions occurring in this area were observed (arrangement of rock layers, faults, the D&#281;bina salt debris separating the Be&#322;chat&#243;w Field from the Szczerc&#243;w Field).

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Study of a New Real-Time Monitoring Method on the Underground Mining Activities

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.229-231.1402 ◽

2012 ◽

Vol 229-231 ◽

pp. 1402-1405

Author(s):

Xiu Zhi Meng ◽

Zeng Zhi Zhang ◽

Zong Sheng Wang

Keyword(s):

Real Time ◽

Underground Mining ◽

Energy Eigenvalue ◽

Mining Area ◽

P Wave ◽

Signal Acquisition ◽

Mining Activities ◽

Real Time Monitoring ◽

P Waves ◽

Monitoring Method

This paper presents a new real-time monitoring method based on the explosion source location technique on the underground mining activities in the situation the state can not achieve the full uninterrupted supervision because of the backward monitoring tools and equipment. The supervise mode results in some small coal mines in the profit-driven to ultra-layer or cross-border mining which causes a many of safety accidents. The five acceleration vibration sensors buried underground in the mining area pick up blasting vibration waves coming from blasting tunneling. Every signal acquisition sub-station deals with the according sensor output signals by using wavelet transform to identify the P waves and using energy eigenvalue method to determine the arriving time of P wave to the sensor, then translates the sensor’s spatial and temporal parameters to the principal computer. The principal computer locates the explosion source by the Geiger algorithm and displays the explosion source’s spatial message in the mine’s electronic map. The method is feasible and the positioning horizontal error is less than 10m by field-proven.

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Combined Impacts of Sand Mining Activities: The Nandu River Downstream Segment

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.671-674.3134 ◽

2013 ◽

Vol 671-674 ◽

pp. 3134-3137 ◽

Cited By ~ 2

Author(s):

Shu Wei Jiang ◽

Abuduhelili Haibier ◽

Yong Xin Wu

Keyword(s):

Water Environment ◽

Aquatic Organisms ◽

Field Investigation ◽

Hydrodynamic Characteristics ◽

Social Stability ◽

Mining Activities ◽

Sand Mining ◽

Natural Evolution ◽

River Sand ◽

Downstream Section

With the accelerated pace of urban construction in Hainan province, demand for building sand increased rapidly, river sand prices soared. This led to the illegal and unauthorized sand mining continue to emerge at Nandu River downstream segment. The current sand mining situation of Nandu River downstream section was expounded. The various impacts of sand mining activities on river regime, flood safety, hydrodynamic characteristics of the river, development of delta and water environment have been studied according to measured data and results of field investigation. It is shown that sand mining activities undermines the natural evolution of the river regime; affects the habitat of fish and other aquatic organisms. Water level drops, water velocity decreases, and the Nandu Rive delta coastline retrogrades due to sand extraction. Besides, sand mining has an obvious adverse impact on infrastructures, waterway safety and social stability.

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GROUND DEFORMATION EXTRACTION USING VISIBLE IMAGES AND LIDAR DATA IN MINING AREA

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ◽

10.5194/isprsarchives-xli-b7-505-2016 ◽

2016 ◽

Vol XLI-B7 ◽

pp. 505-512 ◽

Cited By ~ 1

Author(s):

Wenmin Hu ◽

Lixin Wu

Keyword(s):

Time Series ◽

High Resolution ◽

Ground Deformation ◽

Mining Area ◽

Open Pit Mine ◽

Space Distribution ◽

Open Pit ◽

Mining Activities ◽

Study Results ◽

The Mean

Recognition and extraction of mining ground deformation can help us understand the deformation process and space distribution, and estimate the deformation laws and trends. This study focuses on the application of ground deformation detection and extraction combining with high resolution visible stereo imagery, LiDAR observation point cloud data and historical data. The DEM in large mining area is generated using high-resolution satellite stereo images, and ground deformation is obtained through time series analysis combined with historical DEM data. Ground deformation caused by mining activities are detected and analyzed to explain the link between the regional ground deformation and local deformation. A district of covering 200 km2 around the West Open Pit Mine in Fushun of Liaoning province, a city located in the Northeast China is chosen as the test area for example. Regional and local ground deformation from 2010 to 2015 time series are detected and extracted with DEMs derived from ZY-3 images and LiDAR point DEMs in the case study. Results show that the mean regional deformation is 7.1 m of rising elevation with RMS 9.6 m. Deformation of rising elevation and deformation of declining elevation couple together in local area. The area of higher elevation variation is 16.3 km2 and the mean rising value is 35.8 m with RMS 15.7 m, while the deformation area of lower elevation variation is 6.8 km2 and the mean declining value is 17.6 m with RMS 9.3 m. Moreover, local large deformation and regional slow deformation couple together, the deformation in local mining activities has expanded to the surrounding area, a large ground fracture with declining elevation has been detected and extracted in the south of West Open Pit Mine, the mean declining elevation of which is 23.1 m and covering about 2.3 km2 till 2015. The results in this paper are preliminary currently; we are making efforts to improve more precision results with invariant ground control data for validation.

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Identifikasi Potensi Pembentukan Air Asam Tambang Batubara (PAF /NAF) dengan Menggunakan Metode Uji NAPP (Net Acid Producing Potential)

STRING (Satuan Tulisan Riset dan Inovasi Teknologi) ◽

10.30998/string.v4i1.4274 ◽

2019 ◽

Vol 4 (1) ◽

pp. 80

Author(s):

Baskara Widy Artyanto Putro ◽

Diyan Parwatiningtyas

Keyword(s):

Analytical Methods ◽

Mining Area ◽

Mining Activities ◽

Mining Company ◽

Soil Layers ◽

Mine Area ◽

Kinetic Methods ◽

East Kalimantan ◽

Potential Acid ◽

Ph Range

Several laboratories tests have been developed in Indonesia and another countries that carry out mining activities, especially coal mining. The purpose of this analysis is to find out the presence and absence of soil layers which have the potential to form acidity. The most commonly known analytical methods are static and kinetic methods. The most commonly known method of analysis is static and kinetic methods. Our test this time are uses the NAPP method (Net Acid Producing Potential).Aand then, from the results of this calculation, was known that the mine area had acidic or not. This time, an investigation was conducted to determine the acidity of PAF (Potential Acid Forming) and NAF (Non Acid Forming), which is owned by the mining company PT GIE (Globalindo Inti Energy) at the Handil, Muarajawa, Balikpapan, East Kalimantan regions. From the results of tested and mapped , it was found that this mining area had NAF (Non Acid Forming) soil content, with a PH range between 4.65 - 5.75 and had a negative NAPP price.

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