Effect of depth and particle size on spontaneous combustion of coal in deep underground mines of Jharia coalfifield

• Autorzy: Mishra Debashish , Mishra Devi P. , Mohalik Niroj K. , Ray Santosh K. , Pandey Jai K.

Identyfikatory

DOI

10.46873/2300-3960.1443

• Języki publikacji: EN

Abstrakty

EN

Since their inception, the deep mines have faced the challenges of spontaneous heating and fire. The study examines the impact of coal seam depth and particle size on the spontaneous combustion of coal. A spontaneous heating study of seven coal samples shows moisture, volatile matter, and ash do not exhibit any clear trend except for fixed carbon, which shows a direct relationship. However, crossing point temperature (CPT) and thermo-gravimetric (TGignition) temperature reveal an inverse relationship between spontaneous combustion and the depth of the coal seam. Five size ranges: < 106, 106–212, 212–425, 425–2000, and 0–212 μm are studied, which displayed an increase in mean specific surface area (SSA) by 87% and a decrease in mean D90 value by 93%, with a decrease in particle size from 2000 to 106 μm. The reduction in particle size increases the spontaneous heating tendency by nearly 12–14%. The results show that external factors like coal seam depth, particle size, specific surface area (SSA), mining methods, and others influence spontaneous heating and fire in the Jharia coalfield. Additionally, we develop three mathematical models to forecast spontaneous heating in deep underground coal mines, considering CPT, TGignition, particle size (D90), SSA, and coal seam depth.

Słowa kluczowe

EN

deep underground coal mines; TG ignition; CPT; particle size; specific surface area (SSA); spontaneous heating

PL

głębokie podziemne kopalnie węgla; zapłon TG; CPT; wielkość cząstek; powierzchnia właściwa (SSA); samoczynne nagrzewanie

• Wydawca: Elsevier ; Główny Instytut Górnictwa
• Czasopismo: Journal of Sustainable Mining
• Rocznik: 2025
• Tom: Vol. 24, iss. 1
• Strony: 117--129
• Opis fizyczny: Bibliogr. 32 poz.

Twórcy

autor

Mishra Debashish

• CSIR - Central Institute of Mining and Fuel Research, Barwa Road Campus, Dhanbad, 826001, Jharkhand, India

• https://orcid.org/0000-0001-7993-2895

autor

Mishra Devi P.

• Indian Institute of Technology (ISM), Dhanbad, 826004, Jharkhand, India

• https://orcid.org/0000-0002-0730-3894

autor

Mohalik Niroj K.

• CSIR - Central Institute of Mining and Fuel Research, Barwa Road Campus, Dhanbad, 826001, Jharkhand, India

• https://orcid.org/0000-0003-1521-432X

autor

Ray Santosh K.

• CSIR - Central Institute of Mining and Fuel Research, Barwa Road Campus, Dhanbad, 826001, Jharkhand, India

• https://orcid.org/0000-0002-8938-114X

autor

Pandey Jai K.

• CSIR - Central Institute of Mining and Fuel Research, Barwa Road Campus, Dhanbad, 826001, Jharkhand, India

• https://orcid.org/0000-0002-1304-1587

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025).