Management of massif geomechanics through optimization of development technologies

Abstract

The relevance of the article is explained by the need to search for new resources to increase the efficiency of subsoil use, including due to the rational use of geomechanical features of rock massifs with anthropogenic impact on them and the mechanism of interaction of rocks composing rock massifs. The object of study is the structurally stressed rock massifs of the Sadon ore cluster. The aim of the research is to assess the prospects of field development technologies during the development of reserves in conditions of technogenic weakening of arrays. Methods for solving the main research problem form a complex, including the systematization of information related to managing the array, the development of criteria for the efficiency of ore mining and the formation of the concept of resource-saving technology for developing deposits. Results and discussion of results. The concept of field development technology is formulated on the basis of methods for controlling the state of an array by assigning the optimal level of stresses generated by a combination of seismotectonic impacts and technogenic seismicity. Typification of methods for calculating stable spans of workings is given. Examples of solving mining problems with the recommended calculation methods are given. An algorithm-algorithm for the interaction of array control parameters is proposed. It was determined that the prospects for the development of deposits in the Sadon Group are related to the implementation of the concept of managing rock masses by regulating stresses. It is proved that taking geomechanical factors into account allows at all stages of field development to adjust development parameters with an increase in the quality of mined ores and a decrease in the hazard for workers. Under these conditions, satisfactory performance can only be achieved at the first stage of development when the primary chambers are removed. The development of pillars in the second stage increases stresses to a critical state, which is accompanied by a loss of reserves or a decrease in the quality of ores to unprofitable limits. It was recommended that the development of new reserves and the refinement of existing reserves be carried out according to a combined scheme: valuable ores with the laying of technological voids with hardening mixtures, ores with a lower metal content – leaching using underground leaching tails to control stresses, and leached ores perform artificial pillars, redistributing technogenic and natural stresses.