Temat: gornictwo - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Indicative assessment of design efficiency of mining roadways
Autorzy:: Niedbalski, Z.
Majcherczyk, T.
Powiązania:: https://bibliotekanauki.pl/articles/92113.pdf
Data publikacji:: 2018
Wydawca:: Główny Instytut Górnictwa
Tematy:: mining
roadway
design
stability
górnictwo
chodnik
projekt
stabilność
Opis:: The goal of the study was to develop a method for evaluating the design efficiency of roadways in coal mines. For this purpose, the AHP method (Analytic Hierarchic Process) was used to develop the significance of natural, geomechanical, mining and technical factors in the stability of roadways. According to the research, the greatest impact on the design and maintenance of the roadway is exerted by: tectonic disturbances, seismic activity, joints and compressive strengths of rock, exploitation workings nearby and support bearing capacity. Based on the AHP results, each factor was assigned a percentage effect on the design of the roadways’ support and their stability. Furthermore, they were assigned a numerical or descriptive range of variation in the scope of 0.2-1.0, where the value of 1.0 means high impact on the roadway stability. Then, the indicative method was suggested for the estimation of two indicators: the roadway design efficiency index RDE and the roadway functionality maintenance index RFM. Each of the indices was divided into six degrees indicating the roadway design difficulty in the given geological-mining conditions and also the difficulty of its maintenance. The listed indexes allow support scheme with a modified load-bearing capacity to be planned. In the phase of driving or using the excavation, this method will prove useful in calculating the necessary reinforcement.
Źródło:: Journal of Sustainable Mining; 2018, 17, 3; 131-138
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Analyzing the effect of Akoben programme on the environmental performance of mining in Ghana: A case study of a gold mining company
Autorzy:: Bawua, S. A.
Owusu, R.
Powiązania:: https://bibliotekanauki.pl/articles/92179.pdf
Data publikacji:: 2018
Wydawca:: Główny Instytut Górnictwa
Tematy:: Akoben
Ghana
mining
performance
rating
górnictwo
wydajność
ocena
Opis:: This study assessed the impact of Ghana's Environmental Protection Agency (EPA) Akoben programme, a rating and disclosure tool which seeks to promote better environmental performance in the mining and manufacturing industries in Ghana. Using a case study approach, the Akoben audit report card for a mining company was analyzed over a three-year period (2009e2011) based on 7-criteria e legal requirements, hazardous on-site waste management, toxic emissions management, environmental monitoring and reporting, best practice environmental management, complaint management, and corporate social responsibility. Key stakeholders' perceptions of the programme's suitability were solicited from the Ghana Chamber of Mines, EPA, and the mining company. Findings revealed that overall environmental performance over the three-year period under review was poor (2009 - 56.6%; 2010 - 65.6%; 2011 - 59.1%) with none of the years meeting the expected minimum limit, with the exception of legal requirements and corporate social responsibilities; the company failed in all other criteria. Specifically, both toxic and non-toxic waste emission discharges were major concerns as toxic parameters, such as for Arsenic, pH and Cyanide, were exceeded. Environmental monitoring and reporting was also a problem for the company. Stakeholders identified inadequate publicity, an absence of legal backing, and a lack of incentives for outstanding performances as the main weaknesses of the programme. Despite this, the stakeholders acknowledge the fact that the Akoben programme has improved the environmental performance of the mining companies because it puts their operations in check, although more can yet be achieved with regards environmental sustainability with this programme, if adequate measures including legal backing are put in place to ensure its continuity.
Źródło:: Journal of Sustainable Mining; 2018, 17, 1; 11-19
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Prospects for thiourea as a leaching agent in Colombian gold small-scale mining: a comprehensive review
Autorzy:: Borda, Johana
Torres, Robinson
Powiązania:: https://bibliotekanauki.pl/articles/2201416.pdf
Data publikacji:: 2022
Wydawca:: Główny Instytut Górnictwa
Tematy:: górnictwo
złoto
cyjanek
tiomocznik
mining
gold
cyanide
thiourea
Opis:: Thiourea, as an alternative medium, is one of the most promising leaching agents for gold recovery by its commercial benefits and research challenges associated with performance and environmental impacts. This review article describes the operational conditions for the use of Thiourea vs cyanide, its chemistry, limitations, toxicity factors, environment, and recovery processes. Although thiourea gold extraction processes have not been applied on a large scale due to the instability of the reagent, its potential to overcome the limitations of cyanide is attractive to the process; with pH, potential, oxidant dosage, and temperature control, solubilized gold thiourea species are achieved. These can be recovered from the pregnant leach solution through methods such as activated carbon absorption and adsorption, polyurethane foams, ion exchange, and electrodeposition.
Źródło:: Journal of Sustainable Mining; 2022, 21, 4; 298--308
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Analysis and assessment of parameters shaping methane hazard in longwall areas
Analiza i ocena parametrów kształtujących zagrożenie metanowe w rejonach ścian
Autorzy:: Krause, E.
Smoliński, A
Powiązania:: https://bibliotekanauki.pl/articles/1205455.pdf
Data publikacji:: 2013
Wydawca:: Główny Instytut Górnictwa
Tematy:: bezpieczeństwo
górnictwo
ściana
metan
safety
mining industry
longwall
methane
Opis:: Increasing coal production concentration and mining in coal seams of high methane content contribute to its growing emission to longwall areas. In this paper, analysis of survey data concerning the assessment of parameters that influence the level of methane hazard in mining areas is presented. The survey was conducted with experts on ventilation and methane hazard in coal mines. The parameters which influence methane hazard in longwall areas were assigned specific weights (numerical values). The summary will show which of the assessed parameters have a strong, or weak, influence on methane hazard in longwall areas close to coal seams of high methane content.
Wzrastająca koncentracja wydobycia oraz prowadzenie eksploatacji w pokładach wysokometanowych przyczyniają się do zwiększenia wydzielania się tego gazu do środowiska ścian. W artykule przedstawiono analizę badań ankietowych dotyczących oceny parametrów mających wpływ na poziom kształtowania się zagrożenia metanowego w rejonach eksploatacyjnych. Ankieta została przeprowadzona wśród ekspertów w zakresie przewietrzania i zwalczania zagrożenia metanowego w kopalniach węgla kamiennego. Ankietyzacja polegała na przypisaniu wagi (wartości liczbowej) poszczególnym parametrom wpływającym na kształtowanie się zagrożenia metanowego w środowisku ścian. W podsumowaniu dokonanej oceny parametrów kształtujących zagrożenie metanowe ścian eksploatowanych w pokładach metanowych wskazano te, które w jakikolwiek sposób (silny lub słaby) oddziałują na poziom zagrożenia w rejonach wydobywczych.
Źródło:: Journal of Sustainable Mining; 2013, 12, 1; 13-19
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: An analysis of illegal mining on the Offin shelterbelt forest reserve, Ghana: Implications on community livelihood
Autorzy:: Boadi, S.
Nsor, C. A.
Antobre, O. O.
Acquah, E.
Powiązania:: https://bibliotekanauki.pl/articles/92084.pdf
Data publikacji:: 2016
Wydawca:: Główny Instytut Górnictwa
Tematy:: mining
Ghana
Galamsey
Income
forest
livelihood
górnictwo
dochód
las
utrzymanie
Opis:: Mining in tropical countries contributes significantly to the global minerals supplies but unregulated mining activities in reserved forests is associated with destruction, loss of habitats and loss of biodiversity. This study determined the area of the Offin shelterbelt forest reserve, Ghana, degraded through illegal mining (galamsey) and the impacts on the livelihoods of fringe communities. Thirty-two (32) coordinates were recorded around the peripheries of disturbed site in the reserve using hand-held Global Positioning System and were then imported into a geodatabase in ArcGIS which was used to estimate the area degraded. Data was obtained from 60 purposively sampled respondents from two communities fringing the reserve and 10 key informant interviews. Increased income (13%), employment opportunities (6.7%) and increased market activities (2%) were some benefits of the illegal mining activities identified by the respondents. Eight respondents associated their employment with of the advent of illegal mining activities out which 6 (70%) were engaged directly in mining activities, while 2 (30%) were into trading. The miners earned cash income range of US $ 2.9e22.9 daily. Within 5 years, illegal mining had degraded 2.5 km2 (4.4%) of the total area of the reserve and the destruction of cocoa farms and water sources (31). Farming among respondents reduced from 90% to 76% after illegal mining. The relatively high cost (US$ 6424.1) involved in flushing out and the subsequent return of such miners poses a threat to sustainable forest management and requires a more holistic approach in tackling such a problem.
Źródło:: Journal of Sustainable Mining; 2016, 15, 3; 115-119
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Study of influence of tremors on combined hazards. Longwall mining operations in co-occurrence of natural hazards. A case study
Autorzy:: Trenczek, S.
Powiązania:: https://bibliotekanauki.pl/articles/92042.pdf
Data publikacji:: 2016
Wydawca:: Główny Instytut Górnictwa
Tematy:: underground mining
combined hazards
methane combustion
górnictwo podziemne
zagrożenia skojarzone
spalanie metanu
Opis:: Combined hazards occurring in areas of hard coal mines were characterised. A possible course of processes leading to a mining catastrophe, associated with occurrence of combined hazards, was discussed. An example of a cause and effect chain is presented, where rockburst hazard initiates – with co-occurring climatic hazard – an increase in the level of spontaneous fire hazard, methane explosion hazard and coal dust explosion hazard. Possibility of improving detection of spontaneous fire hazard in presence of co-occurring combined hazards was analysed.
Źródło:: Journal of Sustainable Mining; 2016, 15, 1; 36-47
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: The contribution of mining sector to sustainable development in Saudi Arabia
Autorzy:: Zmami, Mourad
Ben-Salha, Ousama
Almarshad, Sultan O.
Chekki, Houyem
Powiązania:: https://bibliotekanauki.pl/articles/1839062.pdf
Data publikacji:: 2021
Wydawca:: Główny Instytut Górnictwa
Tematy:: mining
sustainable development
Saudi Arabia
cointegration
górnictwo
zrównoważony rozwój
Arabia Saudyjska
kointegracja
Opis:: The mining sector development is among the priorities of the Saudi Vision 2030. There is currently a lot of interest in the role of the mining sector in Saudi Arabia. This research contributes to this debate by empirically assessing the effects of mining on sustainable development in Saudi Arabia during the period 1980-2018. Unlike many previous studies, the three sustainable development dimensions, namely economic, social, and environmental, are jointly considered. The cointegration analysis, based on the ARDL, GregoryeHansen, and combined cointegration tests, confirms the existence of long-run relationships between mining and all sustainable development dimensions. Furthermore, the findings lend substantial evidence on the importance of the mining sector in enhancing economic and social sustainability in the shortand long-run. There is, however, no evidence of the existence of adverse environmental effects of mining. The long-run effects of mining are robust to a battery of robustness and stability tests. Suitable policy recommendations are subsequently reported.
Źródło:: Journal of Sustainable Mining; 2021, 20, 2; 122-135
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 8.

Tytuł:: Gravity field changes during deep exploitation of the coal longwall and their relation to stress distribution and seismic activity
Autorzy:: Kortas, Łukasz
Powiązania:: https://bibliotekanauki.pl/articles/2073908.pdf
Data publikacji:: 2021
Wydawca:: Główny Instytut Górnictwa
Tematy:: gravity
mining
coal
seismicity
tremors
grawitacja
górnictwo
węgiel
sejsmiczność
aktywność sejsmiczna
wstrząsy
Opis:: Mining operations cause volumetric deformations within the rock mass and changes in its density, to which the gravimetric method is sensitive. These changes are particularly well seen in periodic measurements of the local gravity field. The paper analyses the relationship between the movement of a longwall in a coal seam and the change in the distribution of the gravity field in time and space observed on the ground surface. Relative gravimetric measurements were carried out in six series between 2018 and 2020; before the start of coal extraction, with the progress of the longwall and after the cessation of mining. Collected data allowed differential maps of changes in gravity to be plotted. Differential anomalies between the subsequent measurement series, and the reference one were then analysed. The distribution and temporal variations of the anomalies suggest a relationship between changes in density distribution of the rock medium in the longwall overburden, and the change in the stress state in the rock mass caused by the passage of the longwall front. An attempt was made to relate the variability of the state of stresses in the longwall overburden to the intensity of seismic tremors with energy > 10-4 J accompanying longwall exploitation.
Źródło:: Journal of Sustainable Mining; 2021, 20, 4; 228--239
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 9.

Tytuł:: The contribution of mining sector to sustainable development in Saudi Arabia
Autorzy:: Zmami, Mourad
Ben-Salha, Ousama
Almarshad, Sultan O.
Chekki, Houyem
Powiązania:: https://bibliotekanauki.pl/articles/1839055.pdf
Data publikacji:: 2021
Wydawca:: Główny Instytut Górnictwa
Tematy:: mining
sustainable development
Saudi Arabia
cointegration
górnictwo
rozwój zrównoważony
Arabia Saudyjska
kointegracja
Opis:: The mining sector development is among the priorities of the Saudi Vision 2030. There is currently a lot of interest in the role of the mining sector in Saudi Arabia. This research contributes to this debate by empirically assessing the effects of mining on sustainable development in Saudi Arabia during the period 1980-2018. Unlike many previous studies, the three sustainable development dimensions, namely economic, social, and environmental, are jointly considered. The cointegration analysis, based on the ARDL, GregoryeHansen, and combined cointegration tests, confirms the existence of long-run relationships between mining and all sustainable development dimensions. Furthermore, the findings lend substantial evidence on the importance of the mining sector in enhancing economic and social sustainability in the shortand long-run. There is, however, no evidence of the existence of adverse environmental effects of mining. The long-run effects of mining are robust to a battery of robustness and stability tests. Suitable policy recommendations are subsequently reported.
Źródło:: Journal of Sustainable Mining; 2021, 20, 2; 122-135
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 10.

Tytuł:: Risk assessment of occupational groups working in open pit mining: Analytic Hierarchy Process
Autorzy:: Kasap, Y.
Subasi, E.
Powiązania:: https://bibliotekanauki.pl/articles/91919.pdf
Data publikacji:: 2017
Wydawca:: Główny Instytut Górnictwa
Tematy:: open-pit mining
industrial accidents
Analytic Hierarchy Process
górnictwo odkrywkowe
awarie przemysłowe
Opis:: In open pit mining it is possible to prevent industrial accidents and the results of industrial accidents such as deaths, physical disabilities and financial loss by implementing risk analyses in advance. If the probabilities of different occupational groups encountering various hazards are determined, workers’ risk of having industrial accidents and catching occupational illnesses can be controlled. In this sense, the aim of this study was to assess the industrial accidents which occurred during open pit coal production in the Turkish Coal Enterprises (TCE) Garp Lignite unit between 2005 and 2010 and to analyze the risks using the Analytic Hierarchy Process (AHP). The analyses conducted with AHP revealed that the greatest risk in open pit mining is landslides, the most risky occupational group is unskilled labourers and the most common hazards are caused by landslides and transportation/hand tools/falling.
Źródło:: Journal of Sustainable Mining; 2017, 16, 2; 38-46
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 11.

Tytuł:: A sustainable livelihood framework to implement CSR project in coal mining sector
Autorzy:: Narula, S. A.
Magray, M. A.
Desore, A.
Powiązania:: https://bibliotekanauki.pl/articles/92153.pdf
Data publikacji:: 2017
Wydawca:: Główny Instytut Górnictwa
Tematy:: mining
CSR
capacity building
livelihood
community development
górnictwo
budowa potencjału
utrzymanie
rozwój społeczny
Opis:: Corporate social responsibility (CSR) in mining areas has increased momentum especially in countries like India where it has been made mandatory. The primary objective of this paper is to document actual social challenges of mining in field areas and find out how companies in the coal sector can work in a systematic manner to achieve uplift of affected communities. The first part of the paper draws evidence from three different bodies of literature, i.e. CSR and coal mining, capacity building and livelihood generation in mining areas.We try to converge the literature to propose a novel framework for livelihood generation work through capacity building with the help of CSR investments. The paper also documents a live case of planning and the implementation of capacity building activities in Muriadih coal mines in the Jharkhand state of India and offers lessons to both business and policy makers. The proposed framework has only been experimented in a local context, yet has the potential to be replicated in other mining areas.
Źródło:: Journal of Sustainable Mining; 2017, 16, 3; 83-93
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 12.

Tytuł:: Socio-ecological analysis of artisanal gold mining in West Africa: a case study of Ghana
Autorzy:: Takyi, Richard
Hassan, Rasha
El Mahrad, Badr
Adade, Richard
Powiązania:: https://bibliotekanauki.pl/articles/2073904.pdf
Data publikacji:: 2021
Wydawca:: Główny Instytut Górnictwa
Tematy:: artisanal mining
environmental assessment
management
gold
Ghana
górnictwo rzemieślnicze
ocena środowiskowa
zarządzanie
złoto
Opis:: The surge in artisanal gold mining (AGM) activities and the associated environmental impact in Ghana have elicited several stakeholders' attempts to curb the problem. However, due to little understanding of the underlying issues, these efforts have been ineffective. This study aims to use a socio-ecological framework to analyze drivers of AGM activities, the environmental pressures, the state change, their impact on human welfare, and the management response as measures (DAPSI(W)R(M)) to the problem. Evaluate AGM's impact on Ghana's ability to achieve the United Nations Sustainable Development Goals (SDGs). Data were collected from relevant literature on the subject and analyzed with the DAPSI(W) R(M) framework. Esteem needs, food, acceptance and friendship, and self-actualization are the main drivers of AGM activities leading to environmental pressures, including abrasion, extraction of living and non-living resources, the introduction of non-synthetic compounds, among others. State changes of the environment resulting from the pressures generated by human activities were changes in the land and forest cover (1.13%), topography (hills turned into flatland and undulating), and biota. Due to the state in the environment, water quality and availability, agriculture food production, fish yield, food safety, spiritual and cultural loss, death, injury, and health of gold miners and other stakeholders have been affected.
Źródło:: Journal of Sustainable Mining; 2021, 20, 3; 206--219
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 13.

Tytuł:: The balance of methane and ventilation as a tool for methane hazard assessment in the areas of longwalls exploited in hard coal mines
Autorzy:: Koptoń, H.
Wierzbiński, K.
Powiązania:: https://bibliotekanauki.pl/articles/91923.pdf
Data publikacji:: 2014
Wydawca:: Główny Instytut Górnictwa
Tematy:: safety
mining
ventilation
methane hazard
analysis
assessment
bezpieczeństwo
górnictwo
wentylacja
zagrożenie metanowe
analiza
ocena
Opis:: Purpose This article presents an algorithm for the current assessment of methane hazards during the exploitation of longwalls in conditions where there are methane hazards. The algorithm has been developed within the framework of the international AVENTO project (Advanced Tools For Ventilation and Methane Emissions Control), carried out in Poland, inter alia, by the Central Mining Institute in cooperation with Kompania Węglowa SA (KW SA). The algorithm was developed based on the analysis of the ventilation-methane balances for longwall areas, based on the data registered by automatic methane sensors and the velocity of ventilating air. Methods Multiple research methods were used, such as: observation, a questionnaire and statistical methods. The questionnaire was used for the preliminary determination of methane hazards in the longwalls belonging to the industrial partner (KW SA). The polls were used to obtain relevant information about the hazards and means of prevention taken, such as: the methane content in the seam, the emissions of methane into the exploitation workings, the volume of methane drainage, the ventilation system used, and the amount of ventilation air used to combat the methane hazard. Based on the poll’s data, the longwalls with methane emissions in their environment were selected for testing, based on longterm observations of changes in the concentrations of methane in the ventilation air and in the methane drainage net. Methane concentration measurements were based on the values recorded by the methane sensors located in the workings which were considered to be most dangerous. For data processing a statistical method was used. In the research, the average results of the indicated concentrations of methane from the methane sensors were used for the correlation between the average values of methane emission in the region of the longwall or methane drainage, with other parameters, such as absolute pressure changes on the surface, technological processes or cycles in the longwall. For the evaluation of the methane hazard, an indicator was proposed, these being the ratio of the ventilation methane bearing capacity to the criterial methane bearing capacity. An increase of this indicator indicates an increase in the level of methane hazard. Results On the basis of the average daily value of the methane hazard status indicator, an algorithm for the assessment and visualization of methane hazard in the areas of the active longwalls was developed. The algorithm contains a list of technical and organizational actions which should be taken in the event of unfavourable risk assessment of methane hazard, reflecting very high risk or unsafe conditions for conducting further work. Practical implications The proposed algorithm can be used for the ongoing assessment of methane hazard in areas of exploited longwalls in order to support staff in surface control rooms and in ventilation departments. Originality/ value The current assessment of methane hazard in the areas of longwalls which are under methane conditions by means of the developed algorithm will improve the safety of exploitation.
Źródło:: Journal of Sustainable Mining; 2014, 13, 4; 40-46
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 14.

Tytuł:: Measurements of rope elongation or deflection in impact destructive testing
Autorzy:: Szade, A.
Szot, M.
Ramowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/92047.pdf
Data publikacji:: 2015
Wydawca:: Główny Instytut Górnictwa
Tematy:: mining
rope testing
measuring equipment
laser rangefinder
górnictwo
badanie lin
aparatura pomiarowa
dalmierz laserowy
Opis:: The computation of energy dissipation in mechanical protective systems and the corresponding determination of their safe use in mine shafts, requires a precise description of their bending and elongation, for instance, in conditions of dynamic, transverse loading induced by the falling of mass. The task aimed to apply a fast parallactic rangefinder and then to mount it on a test stand, which is an original development of the Central Mining Institute's Laboratory of Rope Testing in Katowice. In the solution presented in this paper, the measuring method and equipment in which the parallactic laser rangefinder, provided with a fast converter and recording system, ensures non-contact measurement of elongation, deflection or deformation of the sample (construction) during impact loading. The structure of the unit, and metrological parameters are also presented. Additionally, the method of calibration and examples of the application in the impact tests of steel wire ropes are presented. The measurement data obtained will provide a basis for analysis, the prediction of the energy of events and for applying the necessary means to maintain explosion-proofness in the case of destructive damage to mechanical elements in the mine atmosphere. What makes these measurements novel is the application of a fast and accurate laser rangefinder to the non-contact measurement of crucial impact parameters of dynamic events that result in the destruction of the sample. In addition, the method introduces a laser scanning vibrometer with the aim of evaluating the parameters of the samples before and after destruction.
Źródło:: Journal of Sustainable Mining; 2015, 14, 4; 211-218
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 15.

Tytuł:: New research on a case of Linear Discontinuous Ground Deformation (LDGD)
Autorzy:: Kowalski, Andrzej
Apanowicz, Bartosz
Polanin, Piotr
Powiązania:: https://bibliotekanauki.pl/articles/1839029.pdf
Data publikacji:: 2020
Wydawca:: Główny Instytut Górnictwa
Tematy:: underground mining
linear discontinuous deformations
case study
górnictwo podziemne
liniowe nieciągłe deformacje
studium przypadku
Opis:: LDGD is defined as surface fissures, steps as well as structures formed by them in the form of several steps, thresholds, ditches, and flexure. The paper presents a case study of formed LDGD - the origin, and possible methods to assess its occurrence on the basis of the research carried out in the Central Mining Institute (Poland). The authors showed that the presence of LDGD leads not only to the horizontal strain but also contributes to the formation of vertical curvatures of terrain that cause fissures in the near-surface layer of the rock mass in the areas with a thick layer of tertiary claystones and a thin layer of Quaternary strata. The accumulated experience also indicates that there is an influence of other mining factors, such as the interval between operations, face advance, and direction of operation, which may contribute to the occurrence of LDGD. Moreover, the authors pointed to the fact that predicting of LDGD is problematic and complex and is subject to uncertainty. The authors showed that both of LDGD methods prediction, when first of them is based on horizontal strains index and second one is points method, have good verifiability in practice.
Źródło:: Journal of Sustainable Mining; 2020, 19, 3; 201-211
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "gornictwo" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język