1887

Abstract

Summary

Coal seams are often associated with trapped methane and some of major Indian coalfields including Sohagpur Coalfield, Jharia Coalfield and Sonhat Coalfield are potential storehouses of CBM. On the basis of methane concentration and its emission, the DGMS has identified the Indian coal seams as Degree I, Degree II and Degree III category, where Degree III seams have highest methane content. In India, around 342 coal mines are currently operational in gassy coal seams, where 95 coal mines are working in the Degree II and Degree III coal seams. Methane is a highly inflammable gas and its concentration in underground mines must be less than 5% for avoiding gas explosions. Hence, degasification is very essential for reducing the risks of gas contamination and explosion for enhancing safety in coal mines. Hydrofracturing is a perforation method used for enhancing the CBM recovery from lower permeable coal seams. The effect of hydrofracturing on coal seams depends on its rank, cleat spacing, fracture density etc. which effects the penetration depth in a wide variation (2.5–60m). The present paper aims to understand the physical as well as mechanical changes due to hydrofracturing in the low permeable high rank bituminous coal seams of Sohagpur Coalfield.

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/content/papers/10.3997/2214-4609.202510009
2025-06-02
2026-02-16

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References

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/content/papers/10.3997/2214-4609.202510009
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Numerical Simulation of Hydrofracturing for CBM Development/Production over Lower Permeable Mature Coal seams of Sohagpur Coalfield
Conference Proceedings 2025, 1 (2025); https://doi.org/10.3997/2214-4609.202510009
/content/papers/10.3997/2214-4609.202510009
/content/papers/10.3997/2214-4609.202510009
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