Quality of blast preparation for rock beneficiation influences both on integrity of mineral stock in particular and in economical performances of enterprise operations in general. While rock processing for obtaining of crushed stone the yield of screenings is high, its amounts depend on rock strength properties. | Determination of rock mass weakening coefficient after blasting in various fracture zones Engineering Solid Mechanics 2017 199-204 Contents lists available at GrowingScience Engineering Solid Mechanics homepage esm Determination of rock mass weakening coefficient after blasting in various fracture zones Valentin Aleksandrovich Isheyskiya and Mikhail Anatolyevich Marinina a Saint-Petersburg Mining University 21 line 2 Saint-Petersburg 199106 Russia A R T I C L EI N F O ABSTRACT Article history Quality of blast preparation for rock beneficiation influences both on integrity of mineral stock Received 6 January 2017 in particular and in economical performances of enterprise operations in general. While rock Accepted 9 April 2017 processing for obtaining of crushed stone the yield of screenings is high its amounts depend Available online on rock strength properties. Investigation into the influence of drilling and blasting parameters 9 April 2017 Keywords on strength properties of blasted rocks is an urgent research and practical task for mining Full-scale experiment companies producing building stones. This article discusses results of full-scale experiment Energy parameters aimed at determination of strength of blasted rocks in shotpile with accounting for fracture Strength properties zones as a function of rock massif saturation with energy of explosive substance. Rocks blast Fracture zones Rock strength 2017 Growing Science Ltd. All rights reserved. 1. Introduction Management of natural resources becomes more and more important upon development of resource intensive technologies. Reasonable management of natural resources as a system of scientific industrial and structural essence assumes the most complete use of mined natural resources and as a consequence decrease in amount of consumed resources provision of recovery and reasonable use of natural resources Bozhenov 1994 . Development of resource saving mining activities should be based on
