Identification of fracture zones at the drill sample recovery in the rock mass

Abstract

The purpose of the work was to develop a new method for identifying fracture zones in a coal-rock mass. The main task of the study was to identnify the fracture zones in the studied sector of the mine field and give them a characteristic. The method is based on the collection and processing of information on geological sections for the investigated section of the mine field. Selection of fracture zones is made by core. For the selected stratigraphic interval, the dimensionless fracture factor is calculated for each well, on the basis of which a predictive fracture map of the investigated area is constructed by the interpolation method. The author proposes a new method for identifying of fracture zones in the coal-rock mass, which was compared with the previously approved one. The given research data showed a high convergence of the results. Application of the method will make it possible to promptly and with a certain degree of probability predict fracture zones in a coal-rock massif, all other things being equal. The use of this method will make it possible to predict fracture zones that may be associated with the release of methane into mine workings, spontaneous combustion and a number of other phenomena, which, in turn, can adversely affect the increase of gas content in mining workings, manifestations of rock and coal outbursts during mining the coal bed. Thus, the use of this method will allow to improve safety of work. Keywords: fracturing, well, rock mass, interval, gas release.