Methane inflow in roadways as a result of process blasting impact on coal seam

The blasting-induced seismic load on Kumpanovsky coal seam in Butovskaya Mine, Kemerovo, Kuzbass in the course of temporary roadway heading is estimated, and the increased concentration of methane is recorded. The delineated zone of methane migration is connected with alternation in the rock mass condition, as well as with the blast location and strength. The minimum amplitudes of coal vibrations are determined, and the seismic energy flow density sufficient to initiate extra inflow of methane in roadways is calculated. The seismic signal and methane emission in roadways are determined with a decreasing distance from the blasting point. The volume of additional methane emission in roadways is found. The decrease in the PPV value and in the seismic energy density is calculated versus the increasing distance from the blasting site. The methane outgassing radius in coal is calculated as function of the initial excited vibration amplitude and seismic energy flow density. The seismic energy flow density pattern is presented depending on the blast source location. The calculation procedure of characteristics of impact on methane-bearing coal seam is proposed for substantiation of coal seam drainage technology and mine air control.

Kurlenya M. V., Tsupov M. N., Savchenko A. V. Methane inflow in roadways as a result of process blasting impact on coal seam. MIAB. Mining Inf. Anal. Bull. 2022;(9):5-14. [In Russ]. DOI: 10.25018/0236_1493_2022_9_0_5.

M.V. Kurlenya¹, Аcademician of Russian Academy of Sciences, Dr. Sci. (Eng.), Professor, Scientific Supervisor of Institute of Mining of SB RAS, ORCID ID: 0000-0003-2610-8434,
M.N. Tsupov¹, Leading Engineer, e-mail: lion_ltd@mail.ru, 
A.V. Savchenko¹, Cand. Sci. (Eng.), Assistant Professor, Head of Department, e-mail: sav@eml.ru, ORCID ID: 0000-0001-8458-1487,
¹ Chinakal Institute of Mining of Siberian Branch of Russian Academy of Sciences, 630091, Novosibirsk, Russia.

A.V. Savchenko, e-mail: sav@eml.ru.

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