Automated determination of rock crushing zones in the collapse

Abstract

Purpose. Development of an automated method for determining the zones of rock crushing in the collapse in order to select rational technologies for drilling and blasting operations. Methods. Methods for determining the positions of nodal and internal points of the coordinate grid of blasted rock collapse, approximation methods, matrix theory, numerical methods in technology are used. Findings. An automated method for determining the zones of rock crushing in the collapse is described. It is based on an analytical method for determining the granulometric composition of blasted rocks in zones of active and passive crushing. The meth-od correlates the granular composition of the blasted rock mass with blockiness of the rock mass, physical and mechanical properties of the blasted rocks, physical and chemical characteristics of the explosive used, and parameters of charge location in the rock mass. Originality. Based on the joint application of methods for determining the nodal and internal points of the coordinate grid and calculation of rock crushing zones in the blasted block, an analytical method for determining the sizes of rock crushing zones in the collapse was developed for the first time in mining.Based on the joint application of methods for determining the nodal and internal points of the coordinate grid and calculation of rock crushing zones in the blasted block, an analytical method for determining the sizes of rock crushing zones in the collapse was developed for the first time in mining. Practical implications. On the basis of the developed method, a computer program was created for the automated determination of the crushing zones sizes of a blasted block. With the help of this program, zones of small, medium and large crushing of the blasted block can be quickly and fairly accurately determined under various parameters and conditions of blasting rock masses. Locations of the blasted block crushing zones thus established serve as a tool for choosing rational technologies of drilling, blasting, excavating and loading operations, which determines their practical value.