Research into the application of excavators equipped with ground pumps for the development of watered overflows

Abstract

Purpose. To conduct a study of the use of hydraulic excavators equipped with soil pumps for the development of watered natural and technogenic alluvial deposits. The methods. Statistical, analytical, and graph-analytical research methods were used in the work. Findings. An analysis of the use of hydromechanization tools used for the development of watered natural deposits and technogenic formations of mineral raw materials was conducted.For the conditions of watered deposits, local areas of technogenic formations (tailing ponds), dredging works, the use of hydraulic excavators "reverse shovel" with a submersible soil pump mounted on the boom handle using a quick-release device was proposed.The parameters of the use of hydraulic excavators with ground pumps for the development of water-fed mineral deposits have been established, the work has calculated the width of the prism of possible rock collapse when developing different types of rocks and obtained the dependence of their change on the height of the developed ledge.It has been proven that the width of the prism of possible collapse depends on the physical and mechanical properties of the rocks and the height of the developed ledge. In particular, when developing sandy and sandy-gravel rocks, the width of the prism will be 10 and 12.6 m, respectively. When developing a deposit with ledges with a thickness of 5 to 10 m, the value of the width of the collapse prism changes from 2.5 m for sandy rocks to 9.6 m for clay rocks.Thus, the conducted research allowed us to establish that hydraulic excavators with ground pumps can be used for the development of watered mineral deposits provided that they are located outside the prism of possible collapse. The originality. The dependence of the width of the prism of possible collapse on the height of the underwater ledge developed by a hydraulic excavator with a ground pump was established. Practical implementation. The results of the research allow us to determine the possibility of using hydraulic excavators equipped with ground pumps for the development of watered natural and man-made placer formations of mineral raw materials for various types of rocks.