IN-SITU GASIFICATION OF STEEPLY DIPPING COAL BEDS WITH PRODUCTION HOLE MAKINGBY SUPERSONIC HYDRAULIC JETS

The article describes the technology and device for efficient use of coal in steeply dipping beds through its complete in-situ burning with thermal-to-electric energy conversion. Production holes are made along the strike of coal seams of complex and nonuniform structure by a controllable drilling tool capable to break both coal and dirt rocks without contacting them and undeviating from the preset direction. It is intended to subject steeply dipping coal seams to steam-and-air blowing to ensure displacement of high-head formation water with pressure to 10 MPa and to heat coal. With this end in view, brand new compressor equipment has been designed to operate hot steam-and-air blast mixture at very high pressure in order to displace formation water beyond the fire-heated reactor range for stimulation of gasification. The process flow chars are developed for complete burning of steep-dipping coal with hot gas production at the steam generator inlet. Complete burning yields high-temperature and high-compression inert products at a level characterized by the thickness and gas impermeability of overburden above the top edges of treated coal seams. Overheated steam goes to the hydroimpact compressors and steam-hydraulic turbines, and is converted to electric energy. By-produced water steam or hot water can be consumed in the nearby localities.


For citation: Buktukov N. S., Gumennikov E. S., Mashataeva G. A. In-situ gasification of steeply dipping coal beds with production hole making by supersonic hydraulic jets. MIAB. Mining Inf. Anal. Bull. 2019;(9):30-40. [In Russ]. DOI: 10.25018/0236-1493-2019-09-0-30-40.

Keywords

Black coal, in-situ gasification, steeply dipping beds, steam-and-air blast, steam generator, hydroimpact compressor, hydroimpulsive drilling, steam-hydraulic turbine.

Issue number: 9
Year: 2019
ISBN: 0236-1493
UDK: 622.33:69.05
DOI: 10.25018/0236-1493-2019-09-0-30-40
Authors: Buktukov N. S., Gumennikov E. S., Mashataeva G. A.

About authors: N.S. Buktukov, Academician of NAS RK, Dr. Sci. (Eng.), Professor, Director, e-mail: n.buktukov@rambler.ru, E.S. Gumennikov, Senior Researcher, e-mail: e.qumennikov@mail.ru, G.A. Mashataeva, Magister, Junior Researcher, e-mail: gulzada_90_90@mail.ru, D.A. Kunaev Mining Institute, 050046, Almaty, Kazakhstan. Corresponding author: G.A. Mashataeva, e-mail: gulzada_90_90@mail.ru.

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