scholarly journals Enhancement of the Walbrzych Hard Coal Mines Geographic Information System for its application in studies of mining deformations

2018 ◽  
Vol 55 ◽  
pp. 00002 ◽  
Author(s):  
Jan Blachowski ◽  
Paulina Herkt
Keyword(s):  
Information System ◽  
Surface Deformation ◽  
Underground Mining ◽  
Coal Mines ◽  
Geographic Information ◽  
Hard Coal ◽  
Mining Sites ◽  
Mining Areas ◽  
Geospatial Analyses ◽  
Interactive Map

Geographic information systems (GIS) have been increasingly used in augmenting studies of mining and post-mining areas such as surface deformation analyses, risk assessment associated with old mining sites, identification of old mining sites and other. Up-to-date and complete geodatabase is an indispensable element of any geoinformation system facilitating such geospatial analyses. In this paper the process of verification and integration of Walbrzych Hard Coal Mines geodatabase and project of enhancing the Deformation Information System for these mines with web map application of underground workings and query tools developed with free and open source software (FOSS) have been described. The interactive map allows users to interact and obtain precise information on location and characteristics of underground mining and the query tools streamline pre-processing operations necessary for geospatial analyses.

Validation of the accuracy of geodetic automated measurement system based on GNSS platform for continuous monitoring of surface movements in post-mining areas

2021 ◽  
Vol 112 (1) ◽  
pp. 47-57
Author(s):  
Violetta Sokoła-Szewioła ◽  
Zbigniew Siejka
Keyword(s):  
Continuous Monitoring ◽  
Surface Deformation ◽  
Optimal Solution ◽  
Satellite System ◽  
Reference Points ◽  
Hard Coal ◽  
Navigation Systems ◽  
Mining Areas ◽  
Global Navigation ◽  
Global Navigation Satellite

Abstract The problem involving the monitoring of surface ground movements in post-mining areas is particularly important during the period of mine closures. During or after flooding of a mine, mechanical properties of the rock mass may be impaired, and this may trigger subsidence, surface landslides, uplift, sinkholes or seismic activity. It is, therefore, important to examine and select updating methods and plans for long-term monitoring of post-mining areas to mitigate seismic hazards or surface deformation during and after mine closure. The research assumed the implementation of continuous monitoring of surface movements using the Global Navigation Satellite System (GNSS) in the area of a closed hard coal mine ‘Kazimierz-Juliusz’, located in Poland. In order to ensure displacement measurement results with the accuracy of several millimetres, the accuracy of multi-GNSS observations carried out in real time as a combination of four global navigation systems, Global Positioning System (GPS), Globalnaja Navigacionnaja Sputnikova Sistema (GLONASS), Galileo and BeiDou, was determined. The article presents the results of empirical research conducted at four reference points. The test observations were made in variants comprising measurements based on: GPS, GPS and GLONASS systems, GPS, GLONASS and Galileo systems, GPS, GLONASS, Galileo and BeiDou systems. For each adopted solution, daily measurement sessions were performed using the RTK technique. The test results were subjected to accuracy analyses. Based on the obtained results, it was found that GNSS measurements should be carried out with the use of three navigation systems (GPS, GLONASS, Galileo), as an optimal solution for the needs of continuous geodetic monitoring in the area of the study.

scholarly journals Seasonal Assessment of Groundwater Contamination in Coal Mining Areas of Balochistan

2020 ◽  
Vol 12 (17) ◽  
pp. 6889
Author(s):  
Ayesha Ayub ◽  
Sheikh Saeed Ahmad
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Coal Mining ◽  
Coal Mines ◽  
Physicochemical Analysis ◽  
Current Status ◽  
Mining Sites ◽  
Mining Areas ◽  
Quality Of Water ◽  
Who Standards

Balochistan is a semi-arid region. The assessment of water quality is very important, as the majority of people depend on groundwater for drinking purposes. The present study involves the quality assessment and mapping of drinking water in the five selected major coal mining sites in the four districts of Balochistan. A total of 50 samples were collected from these five coal mining sites in two seasons: i.e., summer and winter. A physicochemical analysis was carried out for groundwater samples: i.e., pH, electrical conductivity (EC), total dissolved solid (TDS), CO3, HCO3-, Cl-, Ca2+, Mg2+, Na+, K+, Cd, Cr, Co, Cu, Fe, Pb, Mn, Hg, Ni, and Zn. Thematic maps were used to depict the spatial distribution of significant variables and were compared with WHO standards (2011) during both seasons. The majority of parameters crossed the safe permissible limit of WHO standards. The water quality index (WQI) was calculated for the whole monitoring data obtained from both seasons from the perspective of drinking water in each of the selected sites. Moreover, a principle component analysis (PCA) and correlation matrix was carried out for the data analysis in order to identify the source of pollution and correlation among the variables. The results suggested that the overall quality of water from the selected coal mining sites deteriorated due to the overexploitation of coal mines and mining activity. The current investigation provides a comprehensive picture of the current status of water quality in and around the selected coal mines of Balochistan.

scholarly journals InSAR monitoring surface deformation induced by underground mining using Sentinel-1 images

2020 ◽  
Vol 382 ◽  
pp. 237-240
Author(s):  
Ling Zhang ◽  
Daqing Ge ◽  
Xiaofang Guo ◽  
Bin Liu ◽  
Man Li ◽  
...  
Keyword(s):  
Land Subsidence ◽  
Surface Deformation ◽  
Underground Mining ◽  
Deformation Gradient ◽  
Mining Area ◽  
Interferometric Synthetic Aperture Radar ◽  
Mining Areas ◽  
Temporal Decorrelation ◽  
Land Deformation ◽  
Small Baseline

Abstract. Land subsidence can be caused by underground mining activities. Interferometric Synthetic Aperture Radar (InSAR) has became an economic, effective and accurate technique for land deformation survey and monitoring. In mining areas, there may be several factors to overcome for the succsessful application of InSAR, such as temporal decorrelation and detectable deformation gradient, that limit the ability of InSAR to monitoring rapid land subsidence. In this paper, images obtained by the Sentinel-1 satellite with 6 or 12 d revisiting time are used to improve the ability to detect a deformation gradient, and reduce the influence of temporal decorrelation. By combining Small Baseline Subsets (SBAS) and Interferometric Point Target Analysis (IPTA) methods, using the Nanhu mining area in Tangshan as an example, the spatial continuous results of land subsidence in this mining area are obtained with a 70 cm per year maximum rate, which clearly characterizes the deformation field and its deformation process. The results show that InSAR is a useful way to monitor land subsidence in a mining area and provides further data for environment mine restoration.

scholarly journals DEVELOPMENT OF METHODOLOGY FOR BUILDING A GEOINFORMATION SYSTEM FOR ANALYSIS OF NOVOSIBIRSK CYCLING INFRASTRUCTURE

2021 ◽  
Vol 26 (4) ◽  
pp. 55-64
Author(s):  
Kseniya S. Lebedeva ◽  
◽  
Petr Yu. Bugakov ◽  
Keyword(s):  
Information System ◽  
Geographic Information System ◽  
Geographic Information ◽  
The State ◽  
Technological Scheme ◽  
Geoinformation System ◽  
Structural Content ◽  
Efficient Control ◽  
Interactive Map ◽  
The City

The article discusses the development of a methodology for creating a geographic information system for the analysis of cycling infrastructure in the city of Novosibirsk. A publicly available GIS for analyzing cycling infrastructure with an up-to-date database should ensure efficient control over the state of the city's cycling infrastructure, its use and development, as well as access to the cycling infrastructure information to all interested citizens with the ability to contribute to its improvement. To im-plement GIS in practice the following basic instruments were used: full-featured software for preparing mapping materials – ArcGis; JavaScript library, intended to display maps on websites – Leaflet. As a result the article represents technological scheme of GIS creation, gives the description of structural content for attributive information, offers the methods for analysis of the condition and development of cycling infrastructure, as well as describes tools for the creation of the interactive map with the help of Leaflet.

scholarly journals Geodetic monitoring (TLS) of a steel transport trestle bridge located in an active mining exploitation site

2016 ◽  
Vol 48 (3) ◽  
pp. 255-266
Author(s):  
Arkadiusz Skoczylas ◽  
Justyna Kamoda ◽  
Janina Zaczek-Peplinska
Keyword(s):  
Laser Scanning ◽  
Surface Engineering ◽  
Underground Mining ◽  
Terrestrial Laser Scanning ◽  
Point Clouds ◽  
Superficial Layer ◽  
Hard Coal ◽  
Surface Geometry ◽  
Technology Application ◽  
Mining Sites

Abstract Underground mining exploitation causes, in general, irregular vertical and horizontal shifts in the superficial layer of the rock mass. In the case of construction objects seated on this layer, a deformation of the object’s foundation can be observed. This leads to additional loads and deformations. Identification of surface geometry changes in construction objects located within the premises of underground mining exploitation areas is an important task as far as safety of mining sites is concerned. Surveys targeting shifts and deformations in engineering objects preformed with the use of classic methods are of a selective nature and do not provide the full image of the phenomenon being the subject of the observation. This paper presents possibilities of terrestrial laser scanning technology application in the monitoring of engineering objects that allows for a complete spatial documentation of an object subjected to the influence of an active mining exploitation. This paper describes an observation of a 100 m section of a steel transport trestle bridge located on the premises of hard coal mine Lubelski Węgiel “Bogdanka” S.A. carried out in 2015. Measurements were carried out using a Z+F Imager 5010C scanner at an interval of 3.5 months. Changes in the structure’s geometry were determined by comparing the point clouds recorded during the two measurement periods. The results of the analyses showed shifts in the trestle bridge towards the exploited coal wall accompanied by object deformation. The obtained results indicate the possibility of of terrestrial laser scanning application in studying the aftereffects of underground mining exploitation on surface engineering objects.

scholarly journals Exposure to Harmful Dusts on Fully Powered Longwall Coal Mines in Poland

2018 ◽  
Vol 15 (9) ◽  
pp. 1846 ◽  
Author(s):  
Jarosław Brodny ◽  
Magdalena Tutak
Keyword(s):  
Underground Mining ◽  
Coal Dust ◽  
Coal Mines ◽  
Chronic Respiratory Disease ◽  
Working Environment ◽  
Hard Coal ◽  
Free Silica ◽  
Stone Dust ◽  
Hard Coal Mining

The mining production process is exposed to a series of different hazards. One of them is the accumulation of dust which can pose a serious threat to the life and health of mine workers. The analysis of dust hazard in hard coal mining should include two aspects. One is the risk of coal dust explosions, which poses a direct risk of injury or even loss of life, the second is the risk of harmful dust, associated with the possibility of negative health effects as a result of long-term exposure to dust in the worker’s body. The technologies currently applied in underground mining produce large amounts of coal and stone dust. Long-term exposure to dust and crystalline silica may cause chronic respiratory disease. The article presents the results of tests on the dust levels in the area of a fully-powered longwall. The tests were conducted for five longwalls from different hard coal mines. In each of them, the average values of inhalable and respirable dust as well as the percentage content of free silica in the dust were determined in ten selected working positions. Additionally, for the longwall with the highest dust concentration, the levels of dust were determined for the basic activities related to the phases of the technological cycle. The comparative analysis conducted and the results obtained demonstrate large variations in the dust levels in the different areas. The permissible values were significantly exceeded in a number of cases. This poses a great threat to the health of Polish miners. The results obtained indicate that it is necessary to undertake more effective measures in order to improve the working environment of the crew in hard coal mines.

scholarly journals Application of new measurement technology for deformation study of structures in mining areas

2018 ◽  
Vol 55 ◽  
pp. 00008
Author(s):  
Piotr Gruchlik ◽  
Andrzej Kowalski
Keyword(s):  
New Technologies ◽  
Surface Deformation ◽  
Technology Development ◽  
Underground Mining ◽  
New Technology ◽  
Direct Access ◽  
Mining Institute ◽  
Measurement Technology ◽  
Mining Areas ◽  
Before And After

Despite of classic geodetic measurements, which are used in mine surveying at the beginning, more new technology are applied to measure deformation of structures and surface in mining areas. In the article new technologies are described for utilitarian aims based on strain sensors, laser, scanners and drones. The application of new technologies are especially useful when direct access to measured object is impossible using classic methods and in situation where continuous or quasi-continuous measurement is necessary. In Central Mining Institute the research has been conducted to understand the phenomenon of surface deformation induced by underground mining comparing predicted and measured values before and after extraction. In the last 20 years the mining technology has changed and dynamics of structure and surface deformation induced by mining. The second reason of technology development is necessity to instantly inform users of land and structures about changes using for instance the Internet.

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