Authors: S.N. Shirjaev

Title of the article: Multistage degassing of coal-methane seams in the interaction of gas filtration processes and deformation of rock mass

Year: 2019, Issue: 5, Pages: 64-73

Branch of knowledge: 25.00.20 Geomechanics, rock destruction by explosion, mine aerogasdynamics and mining thermal physics

Index UDK: 622. 817.47

DOI: 10.26730/1999-4125-2019-5-64-73

Abstract: A methodical approach of multistage degassing of coal-methane seams has been developed and implemented. The essence of this approach is in step-by-step artificial impact on the rock mass in order to increase its permeability, fracturing and formation of transport flows of water-gas-coal mixture. At the stage of advance degassing, it is proposed to use a plasma-pulse method of acting on coal-methane seams, which leads to the disclosure of natural and the creation of additional cracks, the formation of fluid transport flows in the form of a mixture of gas, liquid and coal particles when the level of water pumped through the wells decreases. At the next stage of preliminary degassing, it is recommended to use directional drilling wells in the zone of increased permeability within the worked and adjacent formations. At the stage of current degassing, the effect of successive changes in the state of coal and rocks at the stages of elastic, elastic-plastic, beyond deformation and destruction of coal seams and host rocks with a directional change in the stress-strain state of the rock mass is used.

Key words: mine degassing methane coal seam well filtration permeability deformation stress porosity

Receiving date: 06.10.2019

Publication date: 31.12.2019

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