A. V. Mikhailov’s scientific contributions

Several studies have been reported about the importance of excavator positioning on open pit. It is essential to study and evaluate the slope stability of non-metallic deposits to understand how various factors affect it. In this work, the relationship between slope stability and the positioning of excavators in non-metallic deposits (as sand and peat) was investigated in order to increase the safety and efficiency of excavators during excavation processes. A two-stage method is proposed. A model of excavator on the pit slope was designed and imported to ''Rocscience Slide 2D'' software with taking all slope parameters constant, except for the slope angle, excavator positioning on the slope and pressure of excavator on slope (NGP). After that the factor of safety value was collected using the Spencer Method. Moving forward with the Two-Level, Three-Factor Full Factorial Design at the Design Expert software to study the effect of each factor on the response variable (FoS), as well as the effects of interactions between factors. The control of NGP value can reduce slope stability in average of 5 to 30% and slope angle can increase FoS by up to 5 to 15%. The study found that rational excavator positioning can significantly reduce the risk of slope failure and improve the overall productivity of the excavation process in non-metallic material deposits. Furthermore, the information obtained could be useful for the development of excavator artificial intelligence systems to control the excavator positioning on open-pit slope and minimize the effect of factor different factor on slope stability.

The article presents an analysis of a rational scheme for surface mining of peat raw materials using the in-pit crushing and conveying (IPCC) system for in-situ processing. Technologies for developing peat deposits are undergoing changes with the phased modernization of mining operations and related equipment, in line with the current trends towards increasing the efficiency of mining machinery and equipment for extracting and processing minerals. As a result of analyzing the in-pit processing system, it was established that there is a need to introduce a grinding module into the process of excavating peat raw material, thus revealing the benefits of in-pit processing. In accordance with the operational flow of raw materials in the technological scheme of the IPCC system, observing the principle of technological gap, it is proposed to unload excavated peat raw material into an intermediate storage area to ensure the operation of mining and processing equipment without having to coordinate their capacity. The placement of the grinding module along the extraction front, together with the movement of the intermediate dump, corresponds to a reduction in auxiliary operations time for moving the module. Due to this, a mobile design for the grinding module was determined due to the reduction in transportation distance of wet excavated raw peat materials with required off-road ability when moving on low bearing capacity grounds. In accordance with the mobile design of the module, a ski undercarriage has been selected, combining the advantages of stationary and mobile location methods inside the quarry.

В статье приведены прогнозы по использованию таких датчиков, как: lidar, лазерный датчик, GPS в целях контроля рабочего органа экскаватора (рука, стрела, ковш). С учетом ряда факторов: статус уступа, стабильность машины, нагрузка, видимость оператора и близость к окружающим объектам, дан анализ категорий рисков возникновения аварийных ситуаций. Система сможет помочь оператору точно позиционировать экскаватор в соответствии с откосом и самосвалом. Анализ кинематики рабочего органа экскаватора в рамках системы координации D-H поможет системе экскаватора контролировать процесс разгрузки ковша, при поддержке датчиков. Это позволит обеспечить точную высоту ковша и траекторию движения рабочего органа от откоса к месту разгрузки. Взаимодействие системы управления и искусственного интеллекта могут быть основой для совершенствования оборудования выемочно-транспортного комплекта с интегрированным в него элементами искусственного интеллекта для снижения вероятности рисков возникновения аварийных ситуаций и соблюдения техники безопасности при проведении работ.

The article analyzes a rational scheme of bulldozer technology of complex surface layer-wise extraction of peat raw materials and wood remains, which contributes to energy and resource saving. Complete extraction of useful components from peat deposits is achieved based on the environmental principles of rational use of natural resources. Agro-industrial and environmental protection are currently becoming promising directions for the use of peat raw materials. The ways of technical retooling and enhancing the efficiency of equipment operation are considered with account for the scale factor of the peat-mining companies. The advantages of the peat mining technology, which can be used in small-scale peat mining companies, are shown. The choice of equipment for the bulldozer technology is made with consideration of the limiting conditions for its application, reduction of the energy intensity of the process; equipment match by technical specifications; versatility and multitask capability.

В статье проведены результаты анализа позиционирования машин выемочно-транспортного комплекта: экскаватор-самосвал в процессе выемки нерудных материалов на уступе карьера во избежание аварийных ситуаций. С учетом ряда факторов: стабильность уступа, стабильность машины, нагрузка, видимость оператора и близость к окружающим объектам, дан анализ категорий рисков возникновения аварийных ситуаций. Полученные результаты дают представление о структуре и причинах возникновения рисков при позиционировании экскаватора на карьере нерудных материалов. Учет рационального позиционирования оборудования при добыче нерудных материалов и могут быть основой для совершенствования оборудования выемочно-транспортного комплекта с интегрированным в него элементами искусственного интеллекта для снижения вероятности рисков возникновения аварийных ситуаций и соблюдения техники безопасности при проведении работ.