Comprehensive gas drainage technology by hydraulic splitting of coal seam using surface holes

Authors: Сластунов С. В., Мазаник Е. В., Садов А. П., Хаутиев А. Б.-М.

The mechanism of efficient in-situ drainage based on an integrated approach and hydrodynamic treatment of a coal seam by means of its hydraulic splitting using holes drilled from the surface and from underground excavations is disclosed. The integrated drainage is aimed to ensure uniform and highly efficient in-situ degassing. The mechanism of efficient integrated in-situ drainage is justified. Reduction in gas content at coal face and decrease in methane emission from coal seam under mining is ensured by high-rate methane drainage using in-seam degassing holes in the zones of hydraulic fracturing and hydraulic splitting, as well as increased residual gas content of coal seam in the zone of hydraulic treatment owing to blocking of methane by water in the infinitesimal pores and fissures in coal seam. Deepening of degassing also occurs as a consequence of methane substitution by water in the absorptive volume of the coal seam under mining. The information on gas drainage phase I implementation in Boldyrevsky coal seam using holes drilled from surface is given. The flow chart of primary exploration in the field of the Kirov Mine is presented. The differences between the test technology and conventional approach described in the main regulations on coal mine degasification are described.

Keywords: Comprehensive in-situ drainage, hydraulic fracturing, hydraulic splitting, effect mechanism, coal seam gas content decrease, methane blocking in pore space, methane substitution by water in coal seam, integrated drainage flow chart, hydraulic splitting technology.
For citation:

Slastunov S. V., Mazanik E. V., Sadov A. P., Khautiev A. M.-B. Comprehensive gas drainage technology by hydraulic splitting of coal seam using surface holes. MIAB. Mining Inf. Anal. Bull. 2020;(1):5-14. [In Russ]. DOI: 10.25018/0236-1493-2020-1-0-5-14.

Acknowledgements:
Issue number: 1
Year: 2020
Page number: 5-14
ISBN: 0236-1493
UDK: 622.817.47
DOI: 10.25018/0236-1493-2020-1-0-5-14
Article receipt date: 25.07.2019
Date of review receipt: 25.08.2019
Date of the editorial board′s decision on the article′s publishing: 20.12.2019
About authors:

S.V. Slastunov, Dr. Sci. (Eng.), Professor, Mining Institute,
National University of Science and Technology «MISiS»,
119049, Moscow, Russia, e-mail: slastunovsv@mail.ru,
E.V. Mazanik1, Cand. Sci. (Eng.),
Director of the Aerological Safety of Underground Mining,
e-mail: mazanikev@suek.ru,
A.P. Sadov1, Cand. Sci. (Eng.),
Director of the Office of Degassing and Methane Utilization,
e-mail: Sadovap@suek.ru,
A.M.-B. Khautiev1, Cand. Sci. (Eng.), Process Engineer,
e-mail: khautievam@suek.ru,
1 Joint-stock company «SUEK-Kuzbass»,
Leninsk-Kuznetsky, Russia.

For contacts:

S.V. Slastunov, e-mail: slastunovsv@mail.ru

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