Temat: mine underground environment - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Mikrosystemy i Sensory
Microsystems and Sensors
Autorzy:: Maksymowicz, L.
Nowak, S.
Leja, E.
Pisarkiewicz, T.
Stapiński, T.
Zakrzewska, T.
Powiązania:: https://bibliotekanauki.pl/articles/154228.pdf
Data publikacji:: 2007
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: optoelectronics
semiconducting gas sensors
modified multicrystalline silicon structures as a light detector thin film technology
vacuum equipment
magnetic tunnel junctions
magnetic random access memory MRAM
radio frequency identification (RFID)
mine underground environment
ceramic microsystem
microfluidics
LTCC
photoimageable thick-films
Opis:: Prezentowana praca zawiera wybrane zagadnienia naukowe związane z rozwijaną od lat tematyką w Katedrze Elektroniki dotyczącą mikrosystemów i sensorów. Autorzy odnieśli się do szczegółowych zagadnień takich jak: półprzewodnikowe sensory gazu, zmodyfikowane struktury multikrystalicznego krzemu jako detektor światła, cienkowarstwowe magnetyczne złącza tunelowe i ich zastosowania. Opisano również opracowywane technologie i konstrukcje urządzeń próżniowych do wytwarzania cienkich warstw i układów wielowarstwowych. Zaprezentowano przykładowe zastosowania techniki sensorowej i radiowej identyfikacji obiektów RFID w sektorze energetycznym. Przedstawiono zastosowanie dwóch zaawansowanych technologii ceramicznych - współwypalanych folii ceramicznych LTCC oraz warstw grubych fotoformowalnych do wytworzenia elementów składowych mikrosystemu ceramicznego dla chromatografii - mikrokanału oraz płomieniowego detektora jonizacyjnego.
The work deals with scientific problems connected with microsystems and sensor technology developed in Department of Electronics. The authors present their achievements such as semiconductor gas sensors, microcrystalline silicon light detectors, thin film magnetic tunnel junctions and their applications. Some vacuum systems for films and multilayers depositions were also designed and constructed by our scientific staff. The sensor and radio frequency identification (RFID) applications were also described. Two advanced ceramic technologies (photoimageable thick films and LTCC) has been successfully combined to obtain microfluidic structures - the microchannel and the flame ionisation detector which are intended to use in a simple, portable ceramic microsystem for chromatography.
Źródło:: Pomiary Automatyka Kontrola; 2007, R. 53, nr 3, 3; 63-69
0032-4140
Pojawia się w:: Pomiary Automatyka Kontrola
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Sensitivity analysis of the effect of airflow velocity on the thermal comfort in underground mines
Autorzy:: Roghanchi, P.
Kocsis, K.
Sunkpal, M.
Powiązania:: https://bibliotekanauki.pl/articles/92169.pdf
Data publikacji:: 2016
Wydawca:: Główny Instytut Górnictwa
Tematy:: underground mine environment
airflow velocity limit
sweat rate
skin wetness
tolerable exposure time
ograniczenie prędkości przepływu powietrza
intensywność pocenia
wilgotność skóry
tolerowalny czas ekspozycji
Opis:: Displeasure in respect to air volumes and associated airflow velocities are well-documented complaints in underground mines. The complaints often differ in the form that there is too little airflow velocity or too much. In hot and humid climates such as those prevailing in many underground mines, convection heat transfer is the major mode of heat rejection from the human body, through the process of sweat evaporation. Consequently, the motion of the mine air plays a pivotal role in aiding this process. In this paper, a method was developed and adopted in the form of a “comfort model” to predict the optimum airflow velocity required to maintain heat comfort for the underground workforce at different activity levels (e.g. metabolic rates). Simulation analysis predicted comfort limits in the form of required sweat rate and maximum skin wetness. Tolerable worker heat exposure times were also predicted in order to minimize thermal strain due to dehydration. The results indicate that an airflow velocity in the range of 1 e2 m/s is the ideal velocity in order to provide a stress/strain free climate and also guarantee thermal comfort for the workers. Therefore, an optimal airflow velocity of 1.5 m/s for the miners' thermal comfort is suggested.
Źródło:: Journal of Sustainable Mining; 2016, 15, 4; 175-180
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Reduction of Saline Waters Discharge from Coal Mines Through Filling and Sealing of Underground Voids
Autorzy:: Strozik, Grzegorz
Powiązania:: https://bibliotekanauki.pl/articles/1179625.pdf
Data publikacji:: 2017
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: environment protection
filling of underground voids
fly ash water mixtures
mine waters management
protection of watercourses
salinized waters discharge
Opis:: Drainage and discharge of mine waters belong to main environmental issues that must be appropriately addressed by underground coal mining industry. Large area of mine fields in Upper Silesia Coal Basin (USCB), which belong both to currently active and already closed mine, together with the geological and hydrogeological structure of the rock mass in USCB, create conditions requiring drainage and discharge of about 118 million m3/yr of mine waters of differentiated salinization. Increasing average depth of mining works and necessity of drainage of numerous closed mines results in increasing amounts of chlorides and sulphates being introduced into water environments, even then coal production of Polish mining industry is decreasing. Majority of mines waters are discharging directly to watercourses and the only significant environmental protection measure is control of the concentration of salt in main rivers. Balance of mine waters and Clˉ + SO42- ions demonstrates weight of this issue and give a background, on which technology of filling of underground voids has been discussed as a method, which, under several conditions, may reduce the discharge of brines and highly salinized mine waters (mineralisation above 42 g/dm3) by about 30%. Although technology of filling of voids with mixtures of water and finely grained solids (mostly fly ash) is well known and adopted by most of coal mines, its potential in reduction of saline waters discharge is being wasting due to inconsequence in its use and underestimating its value in terms of saline waters management. Influence of waters salinity on the physical properties of the fill, as well as benefits gained by the coal mines as result of filling of voids, show that this operations should be conducted in the possibly largest extent, limited only by availability of fly ash and volume of voids, being created as result of coal extraction.
Źródło:: World Scientific News; 2017, 72; 10-25
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Reduction of Saline Waters Discharge from Coal Mines Through Filling and Sealing of Underground Voids
Autorzy:: Strozik, Grzegorz
Powiązania:: https://bibliotekanauki.pl/articles/1181185.pdf
Data publikacji:: 2017
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: environment protection
filling of underground voids
fly ash water mixtures
mine waters management
protection of watercourses
salinized waters discharge
Opis:: Drainage and discharge of mine waters belong to main environmental issues that must be appropriately addressed by underground coal mining industry. Large area of mine fields in Upper Silesia Coal Basin (USCB), which belong both to currently active and already closed mine, together with the geological and hydrogeological structure of the rock mass in USCB, create conditions requiring drainage and discharge of about 118 million m3/yr of mine waters of differentiated salinization. Increasing average depth of mining works and necessity of drainage of numerous closed mines results in increasing amounts of chlorides and sulphates being introduced into water environments, even then coal production of Polish mining industry is decreasing. Majority of mines waters are discharging directly to watercourses and the only significant environmental protection measure is control of the concentration of salt in main rivers. Balance of mine waters and Clˉ + SO42ˉ ions demonstrates weight of this issue and give a background, on which technology of filling of underground voids has been discussed as a method, which, under several conditions, may reduce the discharge of brines and highly salinized mine waters (mineralisation above 42 g/dm3) by about 30%. Although technology of filling of voids with mixtures of water and finely grained solids (mostly fly ash) is well known and adopted by most of coal mines, its potential in reduction of saline waters discharge is being wasting due to inconsequence in its use and underestimating its value in terms of saline waters management. Influence of waters salinity on the physical properties of the fill, as well as benefits gained by the coal mines as result of filling of voids, show that this operations should be conducted in the possibly largest extent, limited only by availability of fly ash and volume of voids, being created as result of coal extraction.
Źródło:: World Scientific News; 2017, 72; 498-512
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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