Feasibility estimates of the efficiency of the Uralmashzavod-made EKG-18 rack-thrust shovels application at opencast coal mines
The article provides the grounding of conditions for the efficient application of the Uralmashzavod-made EKG-18 electric rope shovels with a 22 m3 bucket as compared with a face hydraulic shovel powered by the electric drive of foreign origin and having a 22mі bucket for overburden rock removal at opencast coal mines.
Analysis and prospects of coal production development in Chukotka Autonomous Okrug in the period up to 2035
The article contains data on the coal output in Chukotka AO in the period of 2000 through 2015 and coal supply from Chukotka to the national market and exports in 2014 and 2015. The author lists the promising deposits of the Bering Coal Basin, which would be developed in the Chukotka AO in the nearest coming years, among which are Amaamskaya and Verkhne-Alkatvaamskaya fields.
Long-haul tractor-trailer caravans as new transport vehicles for the efficient development of kimberlite fields in Yakutia
The authors discuss the advantages of polyarticular long-haul tractortrailer caravans and present their conclusions on the efficiency of their application in the development of low-grade ore deposits in Yakutia. The article contains the rationale of technological and economic feasibility of “light-type” railway construction for the formation of an allyearround operable transportation corridor. The authors prove the feasibility of the “corridor” formation for the establishment of continuous freight traffic to the Northern Sea Route and eastern regions of Russia, as well as to the neighbor Central Asia countries. The article also presents the results of experimental use of Scania and Volvo tractortrailer-based caravans for low-grade diamond ore long-distance transportation.
Parameters of a mine fleet remote control system in conditions of the Udachny Mining & Processing Division
The authors present the rationale for the selection and application of a remote control system in mining and hauling processes. To get a deeper insight into the capabilities of a remote control system (RCS) with dump truck and loading equipment in real climate and geological conditions of the Western Yakutia the AK ALROSA (PAO) Managers have taken a decision on the application of this technology in conditions of the Udachny Mine. The risk of pit wall failure and caving in the process of mining at lower horizons has served the main reason for the selection and application of this novel technology. The YakutNIIpromalmaz Institute has performed a comparative analysis of CAT-993K loader and CAT-740B dump truck normal operation: with manual control by loader and dump-truck operators, with remote control by the mine fleet RCS operator. The analysis results would serve a basis for the forecast of mining and hauling operations with the application of the new control system.
Minimizing the extent of peripheral rock fragmentation in excavation processes with the use of emulsion explosives
The article presents characteristics of the main blast patterns providing less intensive peripheral rock fragmentation in excavation processes, and shows their advantages and shortcomings. It also contains basic approaches minimizing the extent of peripheral rock fragmentation with the use of emulsion explosives. Orica case study of pre-split emulsion explosive charge formation with the use of hose retractor is discussed. The results of pilot trials of the hose retractor at Kirovsk Mine of Apatite AO are presented. The authors provide their conclusions on the advantages of emulsion explosives application in excavation processes.
Aspects of explosive materials safety and security in on-site storage in underground ore mines and underground explosive materials preparation plants, as a rule, are implemented with the use of video surveillance cameras and signal transmission to the workstations of a mine blasting supervisor and persons responsible for blasting, such as, chief technology officer (chief engineer), mine dispatcher, drilling and blasting operations manager, etc. The article discusses the issue of explosive materials safety and security in loading/discharge, storage, transportation to a blasting area in underground conditions, and the presence of the personnel in the dangerous zone of blasting operations, as well as the provision of fire safe operation of explosive materials in-situ storage facilities and explosives preparation plants.