Feasibility study of choosing the diameter of borehole charges for drilling and blasting operations in quarries
Journal Title: Вісник Житомирського державного технологічного університету. Серія: Технічні науки - Year 2018, Vol 82, Issue 2
Abstract
It has been established that the issue of choosing the effective diameter of the downhole charge of an explosive for the destruction of rock formation in quarries has not been fully investigated. Existing methods for calculating the diameter of wells for the same conditions for drilling and blasting operations in quarries show different numerical results. It has been proposed to use a technique based on a technical and economic assessment of drilling and blasting indicators of a rock mass for the determination of a rational diameter of a wellbore when conducting drilling and blasting operations in quarries. A calculation formula for determining the diameter of the borehole charge is presented, which relates the cost parameters of well drilling, blasting, as well as the characteristic of the fracturing of the rock mass. This allows for specific mining, geological and technological conditions of field development to determine the rational diameter of borehole charges for drilling and blasting operations in quarries. The graphical dependence of determining the optimal diameter of the well for certain technical and economic indicators at various degrees of fracturing of the rock mass was obtained. It has been established that for the destruction of an almost monolithic rock mass, the diameter of the borehole charge is less than that of a strongly fractured one.
Authors and Affiliations
A. A. Frolov, I. D. Lytvynchuk
Keywords
Related Articles
- EP ID EP420939
- DOI -
- Views 114
- Downloads 0
Transformation areas of accounting reporting and its types in ensuring the quality of information resources
The current research analyzes the verification standard of corporate reporting, as verification is a method that allows us to assess the quality of information about the enterprise’s sustainable development, which is dis...
Biodiesel nitrogen oxides emissions
The trend of using the alternative fuels is increasing because of the global warming. For example, biodiesel improves the balance of carbon dioxide on the planet and reduces soot emissions compared with diesel fuel. But...
Aerials of digital on-air broadcasting
Aerials of digital on-air broadcasting have the specific structural features, that consist in that for the best reception of digital signals without distortion of signal form, gain-frequency response of aerial as links o...
Evaluation influence of machining parameters on shape form errors in turning of machine parts clamped in the chuck with adaptive jaws
The paper deals with the derivation problem of the dependence of machine part geometric form deviation in cross section area on clamping diameter as well as cutting speed, feed and cutting depth in semi finish machining....
The model of carbon raw material heat treatment in electric calciner
The high quality of the carbon raw materials heat treatment control reduces the defective products output in carbon products manufacturing on subsequent stages and improves finished products quality. Synthesis of such sy...