Experiment planning of crystalline structures fracture by inductive plasma flows
Journal Title: Вісник Тернопільського національного технічного університету - Year 2015, Vol 77, Issue 1
Abstract
The article analyses modern fracture theories considering Kausch, Ragel, Narisava and others to be the founders. It determines common shortcomings of known researches and suggests solving them on account of statistic planning of crystalline structures fracture by inductive plasma flows. The use of methods and models of experiment planning allows determining the error of mathematical model and judging about its validity. The variable of rock state and parameters that influence electrothermal rock fracturing are selected. The order of experiment conducting and intervals of factors variation are determined that define the course of research. This article suggests hematite, quartz, calcite and magnesite as rock specimens for conducting the experiment. Valid results of experimental research of inductive plasma by the directed thermal-electric effect on rock failure are provided due to: selection of rock state variable and parameters that will be used during directed thermal-electric rock failure; design of test bench scheme; verification of experimental research model validity. In order to provide valid results of experimental research of inductive plasma by the directed thermal-electric effect on rock failure the orthogonal central composition planning is chosen. In addition, this article suggests the experiment matrix that complies with the approved research model. The electric scheme of experimental research test bench is designed. The experimental test bench differs from the available ones because it does not have capacitive elements. The inductive plasma fracturing plant (IPFP) is planned to be installed in mining industry enterprises. Results validity of experimental research of rock fracture by directed electrothermal influence of inductive plasma is provided. Variation levels and range of main factors (crystalline structure, current and discharge circuit inductance) are chosen. The model validity is verified according to the Cochrane criterion. In order to prevent a priori ignorance the entropy of results is determined. Statistical distribution of specific energy intensity of crystalline structures fracturing in conditions of current variation and discharge circuit inductance is determined.
Authors and Affiliations
Oleh Terentiev, Anton Kleshchov, Pavlo Gontar
Keywords
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