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APPLIED RESEARCHES
Название Coal–rock mass deformation analysis and support design for roadways on seams V-12 and V-26 in the Severnaya Mine of Urgalugol
DOI 10.17580/gzh.2020.01.14
Автор Grechishkin P. V., Feofanov G. L., Kozlov A. G., Zaytsev Ya. I.
Информация об авторе

VNIMI’s Kemerovo Division, Kemerovo, Russia

P. V. Grechishkin, Director, Candidate of Engineering Sciences, pv_grechishkin@mail.ru

 

Urgalugol, SUEK, Chegdomyn, Russia

G. L. Feofanov, Technical Officer, Candidate of Engineering Sciences
A. G. Kozlov, Chief Industrial Engineer in the Severnaya Mine

 

VNIMI’s Siberian Division, Prokopevsk, Russia

Ya. I. Zaytsev, Technician

Реферат

At the present time, the Severnaya Mine of Uralugol prepares and extracts coal from seams V-12 and V-26. The thickness of the seams varies from 1.6 to 3.8 m, the dip angle is to 4°, and the maximum depth of mining on seam V-12 is –350 m. Coal is produced via fully mechanized longwall mining along the strike. The geological analysis of coal seams V-12 and V-26 proves the extreme inconsistency of the seam thickness and enclosing rock mass structure; the immediate roof is everywhere replaced by quar and tuffite bands; the initial geological data are insufficient for the support design for underground excavations. Considering complex and persistently varying geological conditions of the coal seams, the available Rockbolting Design Guidelines provides not always adequate design of heading, support and reinforcement of roadways in the course of their life. This article authors accomplished the research aimed to justify support designs for roadways with regard to the stress–strain behavior of coal–rock mass under conditions of seams V-12 and V-26. The article describes the mine and laboratory studies of physical and mechanical properties of enclosing rock mass, displacements at the roadway boundaries and deep in rock mass, videoimage endoscopy, geophysical studies and numerical modeling of geomechanical processes. The obtained geomechanical parameters included the strength characteristics of rocks and coal, displacements and deformation at the roadway boundaries, vertical and horizontal elastic and elastoplastic strains, full vectors of stresses and strains in rock mass surrounding the roadways, residual/initial strength ratio of coal and rocks, etc. For coal seam V-12, for the natural equilibrium arch, it is recommended to increase the arch coefficient Karch by 15–20% and to use rock bolts with yielding not less than 150–200 mm to eliminate over-load and breaking. Based on the integrated research and analysis of enclosing rock mass of coal seams V-12 and V-26 in the Severnaya Mine of Uralugol, the support designs were adjusted so that to ensure safety of roadways for the whole life of their operation.

Ключевые слова instrumental studies, coal–rock mass, geomechanical processes, faulting, videoimage endoscopy, geotectonic stresses, rockbolting.
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