DETERMINATION OF THE DISLOCATED ZONES, WHICH ARE POTENTIALLY DANGEROUS ON THE OCCURRENCE OF SPONTANEOUS COMBUSTION IN THE COAL LAYERS

Abstract

Problem Statement and Purpose. The structure of the fracturing coal in the zones of geological disturbances is one of factors of origin of the gas dynamic phenomena,including spontaneous combustion of coal layers. The purpose of this work is definition of the disturbance zones, which are prone tospontaneous combustion in coal layers on the basis of application of the developeddevice and methods of selection of samples coal for determination of his propensity to spontaneous combustion and determination of the disturbance zones in coal layers after structural characteristics of coal. Data & Methods. 22 samples of coal medium catagenesis and an ear of low catagenesis from two mines of the Donetsk-Makivsky geological-industrial region of Donbas and 10 samples of coal of medium catagenesis from one mine of the Central region were researched. The selection of the disturbance zones, which are prone to spontaneous combustion in coal layers, is executed on the basis of application of the developed device and methods of selection of samples coal for determination of hispropensity to spontaneous combustion and determination of the disturbance zones in coal layers after structural characteristics of coal. The method of optical research of rocks with application of microscope of MBS‑1 was used for determination of structural characteristics of coal. Results. A device for the selection of point coal samples in the mountain making and, accordingly, method of selection of samples coal for determination of his propensity to spontaneous combustion were developed for determination of his propensity tospontaneous combustion during the leadthrough of experimental researches which are related to determination of the disturbance zones as potential zones, which are prone to spontaneous combustion in coal layers. The developed methods and device was tested at the mine of the Cent al geological-industrial region of Donbas. Samples were selected by a hand device for the selectionof point samples on a depth 1146 m in an amount 10 pieces. The amount of quasi-crystals of coal in samples was analysed and selected by optical the microscope MBS‑1, that is 2,4–4,6%, that is all of samples were selected from the disturbance zone according to the method of the determination of the disturbance zones in coal layers after structural characteristics of coal. Accordingly, plicative violation wasselected on the mine of the Central geological-industrial region on the basis of comparison of results of microscopic researches of coal from the different zones of coal layers. The data, what were got as a result of application of the developed device and methods of selection of samples coal for determination of his propensity to spontaneous combustion and determination of the disturbance zones in coal layers after structuralcharacteristics of coal, can be used for the prognosis of the disturbance zones which can be related to the origin of the gas dynamic phenomena, potential zones ofspontaneous combustion of coal layers.