After analyzing the technology of natural stone mining in Russia in comparison with European countries, we conclude that one of the ways to increase the efficiency of the mining transport equipment system in natural stone quarries is to use wheel loaders more widely. Wheel loaders are characterized by high maneuverability, productivity, and are able to combine excavation, transportation, shipping, as well as perform auxiliary work. At the same time, the loader is very effective for providing access to any section of the quarry after stripping loose overburden and waste that impede movement. To increase the profitability and economic efficiency of natural stone quarrying, it is advisable to use a wheel loader as the main handling, transport and auxiliary equipment. The main reason why wheel loaders equipped with attachments are not widely used in the development of natural stone deposits in Russia is their high cost, which significantly increases capital and operating costs since the main manufacturers of wheel loaders equipped with quick-mounted attachments are such brands as Comatsu, Caterpillar, Volvo, Hyundai, etc. For these purposes, the mounted auxiliary equipment for the CHETRA PK 120 wheel loader of domestic production was designed. The strength of the coupler metalworks and and its hydraulic exponents are calculated. During the design, hydraulic equipment was selected to control and regulate attachments. In case of using the proposed system, the investment costs will decrease, and the proposed organizational and technical measures will increase the efficiency of mining companies due to reduced operating costs.
Современный этап развития геофизического метода регистрации естественного электромагнитного излучения (ЕЭМИ) Измерительный комплекс «ANGEL-M» Разумов Е.А. Оценка факторов сложности условий ведения горных работ на современных угольных шахтах Егоров А.П., Кондаков И.А. Оценка возможности и эффективности внедрения технологических схем скоростной проходки подземных горных выработок на угольных шахтах Егоров А.П., Рыжов В.А. К вопросу систематизации геофизических исследований геомеханического состояния массива горных пород и земной поверхности для оперативного контроля безопасности ведения горных работ на угольных шахтах GITS-система сейсмического мониторинга
Research objective is improvement of engineering methods for calculating the main indicators and parameters of the process of cutting rocks with a carbide tool. The sawing coefficient is defined as the ratio of the total forces that arise during the cutting of rocks with a carbide tool. Numerical estimation of the coefficient is conducted using two methods, both on the basis of experimental data from previous studies, and according to the developed analytical theory for calculating the system of contact forces, which characterize the resistance of the rock material to shear and compression deformations. Energy-power assessment of the process of separation of the surface layer of rock with cutting tool is reduced to determination the system of contact forces, which on the one hand characterize the resistance of the rock material to compression and shear deformations (reactive forces), and on the other - acting from the cutter to the rock active forces. The conducted research makes it possible to calculate the effective power spent on the cutting process, as well as to determine the share of energy that goes to the destruction of rock, tools and heat generation as a result of mutual friction. These results will be in demand by production companies engaged in the extraction, processing of facing stone and also design of stone-cutting equipment.
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