FIELD EXPERIENCE OF HIGHWALL MINING SYSTEM IN ELEGESTA COAL FIELD, REPUBLIC OF TUVA

Use of highwall mining systems is discussed. Some problems connected with more comprehensive study into geology of coal seams and enclosing rock mass in Elegesta coal field are solved. The most critical objectives are confirmation of coal seam thickness and occurrence condition, tectonic structure, physical and mechanical properties of exposed rocks in roof and floor, width of rib pillars, water inflow rate in underground excavations, limits and quality of power-generating and coking coal, ignitability and explosion hazard of coal dust. Useful quality and process properties of produced coal are analyzed, and potential product delivery to consumers is discusses. Basic parameters of mining with highwall systems are determined. From calculations, the minimum parameters for pillars in highwalls to 180 m long (average mining depth is to 60 m below ground surface) are: rib pillar width is 3.1 m; barrier pillar width is 5.8 m; spacing of barrier pillars is 70.0 m. On Ulug seams, the highwall miner cuts 14 rooms and produces 115.65 thou t of gas-fat and fat coal. On seam 6.11, the highwall miner cuts 10 rooms and produces 47.5 thou t of gas-fat and fat coal. The process properties of coal in their bulk treatment by operating preparation plants are determined, and their useful quality for chemical recovery industry are refined.


For citation: Demchenko A. V., Derevyashkin I. V. Field experience of highwall mining system in Elegesta coal field, Republic of Tuva. MIAB. Mining Inf. Anal. Bull. 2019;(6):79-87. [In Russ]. DOI: 10.25018/0236-1493-2019-06-0-79-87.


Keywords

Highwall mining system, coal, Elegesta coal field, coal seam, extraction block, barrier pillar, rib pillar.

Issue number: 6
Year: 2019
ISBN: 0236-1493
UDK: 622.27.326
DOI: 10.25018/0236-1493-2019-06-0-79-87
Authors: Demchenko A. V., Derevyashkin I. V.

About authors: A.V. Demchenko, Cand. Sci. (Eng.), Assistant Professor, e-mail: demchenko_av@mail.ru, I.V. Derevyashkin, Dr. Sci. (Eng.), Professor, e-mail: robotron-04@mail.ru, Moscow polytechnic university, 107023, Moscow, Russia. Corresponding author: A.V. Demchenko, e-mail: demchenko_av@mail.ru.

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