Improving the efficiency of development of overburden rocks and coals of the Elgin Deposit of Yakutia by softening them using surfactants
https://doi.org/10.31242/2618-9712-2021-26-1-7
Abstract
A significant problem for non-explosive development of a deposit is an increase in resistance to digging when rocks and coal freeze. With an increase in the strength properties of rocks, the performance of combines may sharply decrease, especially when operating in winter.
The degree to which the physical and mechanical properties of different lithological compositions of rocks in the Elga deposit affect the productivity of KSM-2000R combine was determined through calculation. For the compression strength of rocks up to 40 MPa, which includes coals and carbonaceous siltstones, the productivity of KSM-2000R will be 1400 m3 /h. With an increase in the content of hard components in rocks from 40 to 60 MPa to 40 % (mainly siltstones), the expected decrease in productivity will be up to 1000 m3 /h, and for the content of hard rocks from 60 to 80 MPa to 33 % – 650 m3 /h. It is proposed to use a surfactant – NaCl solution for preliminary softening of the rocks. After processing these rocks with surfactants under negative temperatures down to –20 degrees, σ decreased by 30–50 %, and σ r decreased by about 50 % for all types and layers of constituent rocks, which will ensure the necessary conditions for their explosive-free development using KSM 2000R type combines.
About the Authors
D. V. Khosoev
N.V. Chersky Mining Institute of the North SB RAS
Russian Federation
Russian Federation
KHOSOEV Dorzho Vladimirovich, leading engineer
43 Lenina pr., Yakutsk 677980
A. I. Matveev
N.V. Chersky Mining Institute of the North SB RAS
Russian Federation
Russian Federation
MATVEEV Andrey Innokentievich, Dr. Sci. (Physics and Mathematics), chief researcher
43 Leninа pr., Yakutsk 677980
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Review
For citations:
Khosoev D.V., Matveev A.I. Improving the efficiency of development of overburden rocks and coals of the Elgin Deposit of Yakutia by softening them using surfactants. Arctic and Subarctic Natural Resources. 2021;26(1):70-77. (In Russ.) https://doi.org/10.31242/2618-9712-2021-26-1-7
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