Organization of non-metallic deposits development by steep excavation layers

Abstract

Purpose. To determine rational technological scheme of extracting mineral resources in the steep excavation layer in non-metallic hard minerals quarries while delivering rock mass from the quarry to the surface processing complex by mobile conveyors' system with crushing complex. Methods. For scientific, theoretical and practical studies we used analytical, graphical and statistical research methods. Findings.Based on previous studies of non-metallic deposits systematization, we worked out a rational technological scheme for extracting mineral resources in the steep excavation layer in non-metallic quarries while delivering rock mass from the quarry to the surface processing complex by mobile conveyor's system with crushing complex. The results of these studies are reflected in identified dependences between parameters of the development system which allowed to determine the efficiency of utilizing the selected technological scheme of extracting mineral resources in the steep excavation layer.Originality. New dependences between parameters of the development system in basic non-metallic quarries have been determined, such as: changes in the general mileage of a front loader related to productivity of quarries and the average distance transportation of minerals related to productivity of quarries.Practical implications. The results of this research will be used for practical applications in the design of mining companies extracting raw materials for production of crushed stone.

Assessment of the ecological efficiency of the open development of non-metallic deposits of useful minerals

“…These minerals are deve loped using drilling and blasting grinding of rocks [3,4]. Therefore, the SPZ size is set at more than 1000 m [5]. Most of the natural mineral raw materials used for the production of building materials, chemical raw materials, and agricultural fertilizers are mined and processed under conditions of a reduced SPZ [6][7][8].…”

“…The main technical and technological measures to re duce the harmful impact of the production processes of mining enterprises on the environment are defined as fol lows [5,10,11]:…”

“…An example would be the quarries for the limestone extraction, developing in Tiaginka (Kherson region) and Ternopil deposits. However, it is known from literary sources [5,10] that finished or partially processed products from the site with MCSP, PCSP can be discharged with an environmentally safe belt conveyor to the surface of the quarry where the main transport vehicles are loaded. Similar technological schemes are developed for powerful ore opencast quarries on which they are successfully applied.…”

“…Considering that the expediency of using MCSP, PCSP in the quarries under study was proved in [5,10], an urgent task is substantiation of the environmentally friendly tech nological schemes for delivering finished products from the quarry and their delivering to the main transport vehicles. That is why the environmental justification of technological schemes for the development of mineral resources that are optimal for enterprises and the environment is relevant.…”

General methods of managing the front of mining operations with working out the sides with steep dipping layers

“…Технологія їх наступного відпрацювання розглянута багатьма вченими-гірниками. При цьому, робоча зона кар'єру формувалася етапами і мала відповідні часові та геометричні показники [4][5][6][7][8][9].…”