Authors: S.I. Kalinin, G.N. Rout, Yu.М. Ignatov, E.A. Razumov

Title of the article: Investigation of changes in the parameters of geomechanical processes at high speeds of face advance

Year: 2021, Issue: 1, Pages: 46-55

Branch of knowledge: 25.00.20 Geomechanics, rock destruction by explosion, mine aerogasdynamics and mining thermal physics

Index UDK: 622.001.05:622-01.284.74:622.012.2

DOI: 10.26730/1999-4125-2021-1-46-55

Abstract: The results of instrumental observations and subsequent calculations of the parameters of geomechanical processes at high speeds of longwall face advance are presented on the example of mining operations in the Taldinskaya-Zapadnaya-1 and V. D. Yalevsky mines of SUEK-Kuzbass JSC. Comparison of calculated parameters of geomechanical processes according to normative documents and observational data showed that the stress concentration coefficient in the zone of maximum abutment pressure at the rate of face advance of 15 m/day is 5.1 and exceeds the stress concentration coefficient at the rate of face advance of 5 m / day by 1.88 times. The findings show that a significant increase in the speed of face advance leads to a larger value of stresses in the zone of abutment pressure, the width of the abutment pressure zone decreases, the maximum abutment pressure approaches the line of the longwall face. Monitoring of the technological process in the studied longwall faces shows that there are cases of ‘abrupt’ rock subsidence, as a result, the safety valves of powered support hydraulic props fail to operate leading to emergency situations including deformation of the powered support and longwall face-end supports.

Key words: parameters of geomechanical processes high rates of face advance abutment pressure "abrupt" rock subsidence

Receiving date: 13.02.2021

Publication date: 29.04.2021

CITE DOWNLOAD