Authors: A.D. Smirnova, T.V. Mikhailova

Title of the article: Features of determining locations for drilling wells for advance degassing based on field and laboratory studies of core samples and geomechanical modeling

Year: 2025, Issue: 4, Pages: 47-67

Branch of knowledge: 2.8.8 Mining machines, geotechnology (engineering)

Index UDK: 622.324.5

DOI: 10.26730/2618-7434-2025-4-47-67

Abstract: The increased gas-dynamic hazard associated with underground mining of methane-rich, low-permeability, and deep coal seams necessitates the use of advance coal seam degassing technology. The aim of the study is to develop a scientifically based method for determining the locations of wells for advance degassing of coal seams based on a comprehensive analysis of data for the conditions of the South Kuzbass group of coal deposits. The research methods included the interpretation of geophysical data, the results of hydrodynamic studies of wells, laboratory tests of coal cores, and mini-GRP data. The main and additional criteria determining the effectiveness of advance degassing of coal seams have been summarized and refined. The features of determining the main components of the stress tensor in a coal-bearing massif not relieved from rock pressure were established. A typical one-dimensional geomechanical model was constructed to assess the natural geomechanical state of coal seams in intervals not covered by direct measurements. Based on the simulation results, the gradients of geostatic and formation pressure were established. The directions of the principal horizontal stresses affecting the direction of endocline crack propagation and determining the anisotropy of gas permeability were determined. A method was developed to improve the accuracy of design solutions for early degassing in the early stages of development of high-gas deposits, taking into account mining-geological, petrographic, and geomechanical characteristics.

Key words: coalbed methane pre-mine degassing gas permeability well logging laboratory testing geomechanical modeling

Receiving date: 21.08.2025

Approval date: 17.11.2025

Publication date: 23.12.2025

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