Criterion to select rational parameters of supports to reduce expenditures connected with construction and maintenance of development working

Solodyankin, O. V.; Hryhoriev, O. Y.; Dudka, I. V.; Mashurka, S. V.

Purpose. Substantiation of the parameter allowing predicting cost of mine working construction and maintenance under certain mining conditions taking into account a type of the mine working support, its parameters, repair size and cost as well as lifetime. Methodology. Methods for generalization and comparative analysis, processing of underground investigation data, mathematical (numerical) modeling of geomechanical processes, and evaluation of economic efficiency have been applied. Findings. Methodology to determine total costs for construction and maintenance of an extended mine working has been substantiated. A parameter of a mine working repairability has been proposed. The parameter considers intensity of rock contour displacements and cost of repair operations resulting from critical displacements of roof and floor. The repairability parameter has been used to substantiate the criterion allowing selecting rational support parameters to cut total costs for a mine working operation. A complex of field and numerical studies has been performed for Pivdennodonbaska No. 1 Mine. That made it possible to determine regularities of deformation processes within rock mass around mine working with frame support, and frame and roof bolting. Originality. Innovative numerical model of geomechanical "mine working support-rock mass" system for Pivdennodonbaska No. 1 mine has been developed. The model allows studying deformation processes connected with floor rock heaving and its dinting in the context of different stages of a mine working operation. Regularities of "mine working support-mass" geomechanical system deformation have been determined making it possible to substantiate rational parameters for maintenance of mine workings to reduce repair cost at Pivdennodonbaska No. 1 mine. A parameter of a mine working repairability has been proposed taking into consideration the intensity of rock contour displacements and repair cost as well as the criterion helping select rational support parameters. Practical value. Methodology to determine total cost of construction and maintenance of extended mine working can be used for designing rational support systems and selecting ways to improve stability of mine workings.


	Наукова періодика України		Naukovyi visnyk Natsionalnoho Hirnychoho Universytetu