Repository logo
  • English
  • Yкраї́нська
Log In
New user? Click here to register.Have you forgotten your password?
  1. Home
  2. Персональні колекції співробітників та підрозділів
  3. Кафедра відкритих гірничих робіт
  4. Геомеханическая оценка устойчивости внутреннего отвала на подработанном основании борта карьера
 
  • Details

Геомеханическая оценка устойчивости внутреннего отвала на подработанном основании борта карьера

Date Issued
2017
Author(s)
Ковров, А. С. 
Бабий, Е. В. 
Бубнова, Е. А. 
Abstract
Purpose. Evaluation of the stability of the internal rock dump on the worked up pit edge of Pervomaiskiy
quarry of SevGOK taking into consideration geometry, rock physical and mechanical properties and seismic impacts from blasting operations. Methodology. To study geomechanical stability of the pit edge while mining operations, the data of engineering and geological surveys, technological schemes for
conducting open mining operations, surveying data were used. For numerical simulation of the internal dump slope stability and the pit edge slope stability, the finite element analysis software Phase2 by Rocscience Inc. is used. Findings. Geomechanical assessment of the stability of the quarry internal dump constructed on the southwestern pit edge taking into consideration complex structure, rock properties and seismic effects from blasting operations has been carried out. For a three-tier dump, safety factors were calculated taking into consideration seismic impacts from blasting operations at a quarry in the range of 0.00625-0.1 g, which corresponds to a magnitude of 3-7 earthquake. The potential effect of extinguished
underground mine workings on the stability of the internal dump was assessed. Originality. It is established that the maximum potential displacement of the massif near the extinguished underground workings in the pit edge reaches the value Uxy = 7.6-22.0 m, and a large-scale subsidence area of
rocks up to 50-60 m in diameter and up to 4 m in depth can form on the surface of the internal dump. Seismic impacts from blasing operation at the quarry can be as a trigger factor for geomechanical disturbances. Practical value. The results of numerical simulation of the stability of internal dump on worked up the pit edge foundation can be considered in mining development projects to ensure the safety of the open mining technology and internal dumping operations.
Subjects

stability of the open...

internal dump

maximum rock mass dis...

safety factor

seismic impact

Mohr-Coulomb failure ...

File(s)
Loading...
Thumbnail Image
Name

MGRP_2017_5_14.pdf

Size

681.18 KB

Format

Adobe PDF

Checksum

(MD5):164d1fe29c4d3182b92f1b0896b5a7dd

.

Built with DSpace-CRIS software - Extension maintained and optimized by 4Science

  • End User Agreement
  • Send Feedback
Repository logo COAR Notify