Examining the Impact of Coal Gas Emissions on the Stability Analysis of Coal Pillars: A Critical Literature Review.
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| Title: | Examining the Impact of Coal Gas Emissions on the Stability Analysis of Coal Pillars: A Critical Literature Review. |
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| Alternate Title: | Ispitivanje utjecaja emisija plina iz ugljena na analizu stabilnosti stupova ugljena: kritički pregled literature. |
| Authors: | Ardehjani, Emad Ansari1 eaa.emad14@gmail.com, Ataei, Mohammad2, Sereshki, Farhang2, Mirzaghorbanali, Ali3, Aziz, Naj4 |
| Source: | Rudarsko-Geološko-Naftni Zbornik. 2024, Vol. 39 Issue 3, p77-94. 18p. |
| Subject Terms: | *Mines & mineral resources, *Coal mining, *Coal gas, *Elastic modulus, *Gas absorption & adsorption |
| Abstract (English): | An essential component of guaranteeing the security of underground coal mines is the stability of underground areas. Coal pillars are left in place in underground coal mines to stabilize opened regions where excavations have redistributed in situ stresses. The designs of pillars have been developed in accordance with the necessary safety and economic constraints. The safe and cost-effective design of mining pillars, particularly coal pillars, is influenced by various factors. The purpose of this publication, which is a portion of a doctoral thesis, is to support a theory regarding the impact of methane emissions on the stability of coal pillars. This topic has not received much attention in the literature. The pillar design’s initially effective parameters are examined and categorized in this study. The impact of coal gas emissions on the stability of coal roofs, pillars, and walls are investigated for the first time. Previous research on the mechanical behavior of coal exposed to different kinds of gases is examined for this aim. The literature’s findings also showed that coal’s mechanical properties will decrease when exposed to gases, including shear strength, elastic modulus, and uniaxial compressive strength. The coal texture develops joints and cracks as a result of gas adsorption and emission, which lowers the mechanical properties of the coal and causes instabilities in underground spaces. The literature suggests that gas emissions from coal pillars and walls in underground mines most likely produced unpredictable instability and outburst. To the best of the authors’ knowledge and ability to determine, there is an absence of critical literature reviews on the mechanical properties of coal during gas emissions, which is the topic of this work. [ABSTRACT FROM AUTHOR] |
| Abstract (Croatian): | Nužna komponenta jamstva sigurnosti podzemnih rudnika ugljena jest stabilnost podzemnih prostorija. Stupovi ugljena ostavljaju se na mjestu u podzemnim rudnicima kako bi stabilizirali otkopane prostore gdje su iskapanja izazvala raspodjelu naprezanja na terenu. Dimenzije stupova konstruiraju se u skladu sa zahtijevanim sigurnosnim i ekonomskim ograničenjima. Različiti čimbenici utječu na sigurnu i isplativu konstrukciju stupova, posebno stupova pri eksploataciji ugljena. Ovoj temi nije posvećena dovoljna pozornost u literaturi. Svrha je ove studije podržati teoriju o utjecaju emisije metana na stabilnost stupova ugljena. Ispitani su i kategorizirani početni efektivni parametri konstruiranja stupa. Prvi put istražuje se utjecaj emisije plina iz ugljena na stabilnost krovine, stupova i bokova. U tu svrhu pregledana su prethodna istraživanja mehaničkoga ponašanja ugljena izloženoga različitim vrstama plinova. Pregled literature pokazuje da će se mehanička svojstva ugljena (posmična čvrstoća, modul elastičnosti i jednoosna tlačna čvrstoća) smanjiti kada je on izložen utjecaju plinova. Tekstura ugljena stvara pukotine i prsline kao rezultat adsorpcije i emisije plina, što smanjuje mehanička svojstva ugljena i uzrokuje nestabilnosti u podzemnim prostorijama. Zaključak pregleda literature sugerira da su emisije plinova iz ugljenih stupova i bokova najvjerojatnije uzrokovale nepredvidive nestabilnosti i gorske udare u nekim podzemnim rudnicima. Prema saznanjima i uvjerenjima autora nedostaju kritički pregledi literature o mehaničkim svojstvima ugljena tijekom emisije plinova pa ova studija daje doprinos u tome smjeru. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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