Authors: A.D. Smirnova, T.V. Mikhaylova, A.V. Popov

Title of the article: An integrated approach to the assessment of fracturing and gas permeability of coal-bearing rocks based on the analysis of physical and mechanical properties

Year: 2025, Issue: 4, Pages: 71-83

Branch of knowledge: 2.8.6. Geomechanics, destruction of rocks by explosion, mine aerogasdynamics and mining thermophysics

Index UDK: 622.324.5

DOI: 10.26730/1999-4125-2025-4-71-83

Abstract: Despite the global transition to renewable energy sources, coal continues to play a vital role in the energy balance of industrialized countries. In this context, the Russian coal and energy sector is facing the urgent challenge of shifting towards a technologically sophisticated, environmentally responsible, and resource-efficient model of deposits development A strategic focus within this framework is the integrated development of coal deposits, including the co-extraction of coalbed methane. This approach requires reliable forecasting of zones with increased fracturing and gas permeability potential. The present study aims to develop a methodology for justifying the placement of pre-mining methane drainage wells in poorly explored, but methane-rich coal deposits. It emphasizes the importance of integrating available engineering-geological and geomechanical data with digital modeling techniques. The research investigates the spatial variability of physical and mechanical properties of coal-bearing rocks as a foundation for geomechanical modeling and identifying of priority zones for drilling. Core samples from structural wells drilled in the Tutuyasskaya area of Kuzbass were analyzed in laboratory settings. Values of bulk density and uniaxial compressive strength were determined for three lithotypes. A database was compiled containing lithological descriptions, sampling intervals, and physical and mechanical properties values. Applying Kriging interpolation method, two-dimensional grid-based maps of properties distribution were created, enabling geomechanical zonation. The spatial patterns of physical and mechanical properties variation revealed criteria for selecting the most optimal zones for drilling

Key words: Kuzbass coalbed methane pre-mining methane drainage core physical and mechanical properties geomachanical zonation digital modeling

Receiving date: 12.05.2025

Approval date: 22.06.2025

Publication date: 28.08.2025

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