Szkoła Eksploatacji Podziemnej

The field of application of the results of this work is cast and packed protective-insulating walls, which support roadway districts after the coal seam is mined out. A peculiarity of technologies for constructing these types of protection means of the roadways is the use of quick-hardening mixtures in a liquid state. Therefore, the method for calculating rational parameters of protective-insulating walls was improved depending on the rocks strength and the speed of the longwall face advancing. The method takes into account the dimensionless coefficients of the concrete walls weakening under the influence of their structure, relief irregularities of the rocks pressing the wall, and aggressiveness of mine water, which is used to dilute the mixture. The calculations made it possible to substantiate the conformity of the rate of the concrete hardening in the protection means to the intensity of loads on them in the conditions of the PE "Shakhta Lisova" of the SE "Lvivvugilya". Implementation of the calculation results in the production process made it possible to preserve the belt roadway for its reuse while mining the adjacent panel.