scholarly journals Optimization of the Natural-Technical System “Iron Ore Quarry” Management Based on the Algorithm of the Rock Mass Stability Ensuring

2019 ◽  
pp. 466-470
Author(s):  
L. Yarg ◽  
I. Fomenko ◽  
D. Gorobtsov
Keyword(s):  
Rock Mass ◽  
Iron Ore ◽  
Technical System ◽  
Rock Mass Stability

scholarly journals Development of a New Prediction Method of Rock Mass Stability Based on the Results of the Back Analysis during Excavation.

2002 ◽  
pp. 253-262 ◽  
Author(s):  
Kunifumi TAKEUCHI ◽  
Tomoyuki SHIMURA ◽  
Shinichi AKUTAGAWA ◽  
Shunsuke SAKURAI
Keyword(s):  
Rock Mass ◽  
Back Analysis ◽  
Prediction Method ◽  
Rock Mass Stability

Anisotropic characteristics of jointed rock mass: A case study at Shirengou iron ore mine in China

2015 ◽  
Vol 48 ◽  
pp. 129-139 ◽  
Author(s):  
Tianhong Yang ◽  
Peitao Wang ◽  
Tao Xu ◽  
Qinglei Yu ◽  
Penghai Zhang ◽  
...  
Keyword(s):  
Rock Mass ◽  
Iron Ore ◽  
Jointed Rock ◽  
Jointed Rock Mass ◽  
Iron Ore Mine

Rock Mass Stability Around Underground Excavations in a Mine

2019 ◽  
Author(s):  
Yan Xing ◽  
Pinnaduwa H.S.W. Kulatilake ◽  
Louis Sandbak
Keyword(s):  
Rock Mass ◽  
Underground Excavations ◽  
Rock Mass Stability

scholarly journals INFLUENCE OF PARAMETERS OF EXPLOSIVE DESTRUCTION OF MINING BLOCKS OF COMPLEX GEOLOGICAL STRUCTURE ON THE PREPARATION OF THE MINING MASS FOR PROCESSING

2018 ◽  
pp. 68-74
Author(s):  
К.V. Babii
Keyword(s):  
Particle Size ◽  
Rock Mass ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Iron Ore ◽  
Geological Structure ◽  
Contact Zones ◽  
Complex Geological Structure ◽  
A Charge ◽  
Explosive Destruction

Purpose: to investigate the influence of the parameters of explosive destruction of mining blocks of complex geological structure on the production processes of mining and processing of iron ore. Determine the stability of the escarpment slopes during excavation of rocks in ore mining blocks with barren layers. Results. The analysis of geophysical methods for studying the structure of deposits. It is proposed to use the magnetic susceptibility method for well logging. The structure of mining blocks of a complex geological structure with contact zones "ore - host rocks" was investigated. It has been proven that for the effective use of equipment for the pre-enrichment of ore in a quarry there are conditions: the regulation of the granulometric composition of the rock mass and the reduction of ore splices with overburden rocks. It is proposed to use a charge design of an explosive with inert gaps or a charge section of a cumulative action in the explosive destruction of rocks with contact zones. The influence of parameters of explosive destruction of mining blocks of complex geological structure on the formation of technological complexes of ore beneficiation in quarries is established. The dependence of the factor of stability of slopes of slopes during excavation of rocks, depending on the geological parameters. Scientific novelty. The regularities of changes in the parameters of the ore mass flow (medium piece and oversize) are established depending on the diameter of the drilling-blast wells, which allows you to adjust the particle size distribution. Practical significance. Based on the established patterns and improvement of the design of well charges, their influence on the quality of the blown-up rock mass in the ledges of a complex geological structure has been substantiated, which makes it possible to form the corresponding technological complexes of ore dressing in quarries. The result is a significant increase in the productivity of the technological equipment of the mining enterprise and the profitability of iron ore mining. Key words: quarry, ledge, complex geological structure, downhole charge structures, particle size distribution.

scholarly journals Study of Rock Mass Stability Decrease due to Underground Mining

2020 ◽  
Vol 4 (4) ◽  
pp. 251-261
Author(s):  
V. I. Golik ◽  
S. A. Maslennikov ◽  
Alberto Martin Nunez Rodriguez ◽  
V. I. Anischenko
Keyword(s):  
Rock Mass ◽  
Energy Management ◽  
Underground Mining ◽  
Geophysical Methods ◽  
Electrode System ◽  
Stability Study ◽  
Rock Masses ◽  
Rock Mass Structure ◽  
Rock Mass Stability ◽  
Specific Metal

The optimization of underground mining processes is carried out based on rational use of energy for obtaining preset broken ore size. The effective optimization requires correct assessment of the properties of the rock mass to be broken. Energy management requires assessment of rock mass stability decrease due to impact of natural and technogenic stresses. To make adjustments to the general energy management model, information on the rock mass structure is required to be obtained by geophysical methods. To optimize broken rock/ore size (to minimize oversized or excessively crushed mineral fraction yield during breaking), blasting energy application should be regulated and smart. The study is aimed at assessing the effectiveness of using geophysical methods for the prompt and correct assessment of rock and backfill mass condition during underground mining of mineral deposits. Decreasing stability of rock masses is assessed using the method of electrometric surveys in noncore exploratory boreholes. Rock mass stability study allowed revealing correlation and dependencies between the studied parameters. Effectiveness of using geophysical methods for differentiating natural and technogenic masses by degree of decreasing their stability due to geological and technogenic stresses. To determine the coefficient of decreasing rock mass stability based on rock apparent resistivity data, electrometric logging was used. This allowed to differentiate rock mass by the degree of decreasing rock mass stability based on the revealed dependency. The features of the geophysical survey components are described in details. The methodology and findings of the underground electric sounding using a sequential gradient electrode system at specific metal deposit are presented, including using theoretical curves and determining rock conductivity and the distance to workings. Besides, correctness of the geophysical method findings was assessed differentially. The assessment was prepared for decreasing rock mass stability based on electrometric logging data, and for advance outlining heterogeneity zones in rock masses by electric sounding along working walls. Based on findings of the conducted experimental work on revealing structural boundaries within rock mass, the method of electric sounding along working walls was recommended for application in practice. As for the studied borehole electric sounding application, the convergence of the experimental and theoretical curves is insufficient to recommend the method for practical application.

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