ДОСЛІДЖЕННЯ ЕНЕРГОЄМНІСТІ РУЙНУВАННЯ ВУГЛЕПОРОДНОГО МАСИВУ

Abstract

Purpose. Study of the physical and mechanical characteristics and energy intensity of the destruction of coal massif rocks by dynamic loads, taking into account the directional change in their properties. The methods. To study and evaluate the energy intensity of the destruction of anisotropic rocks under dynamic loads, experimental studies were carried out in laboratory conditions. The selected samples were saturated with surfactants (surfactants). After the destruction of the samples by dynamic loads, the character of the destruction of the rock was evaluated by the granulometric characteristics using the method of optical microscopy. The energy intensity of the destruction was determined by the amount of work spent on the formation of a new surface of particles of rock destruction products. Findings. The analysis of the granulometric and energy characteristics of samples of coal-bearing stratum rocks showed that with increasing alkalinity of surfactant solutions, a decrease in the specific energy of destruction by explosive loads of quartz rocks is observed. The effect of surfactants on the nature of limestone destruction is especially noticeable. Under the action of explosive loads, the specific energy of destruction when this rock is saturated with soda ash decreases. The saturation of coal with different degrees of coalification practically does not affect the energy intensity of their destruction under impact and explosive loads. The originality. A method of estimating the energy intensity of the destruction of anisotropic rocks under dynamic loads has been developed, taking into account the directed change in their properties under the action of surfactants. The priority of the method is protected by a patent of Ukraine. Practical implementation. The use of surfactants makes it possible to reduce the specific energy of destruction when the rock is subjected to dynamic loads, which creates the basis for the development of new energy-saving methods of crushing the coal massif. Keywords: coal massif, explosive destruction, surfactants, granulometry, dispersion.