FIELD: mining industry. SUBSTANCE: this relates to device for treating strata of ground or rock mass in one operation. Device has sinking string made up of single pipe which runs from ground surface into bore-hole and has perforated portion located in bore-hole at mass to be treated. Installed inside perforated portion of pipe are parallel pipes of various length so that their upper ends are located at upper end of perforated portion, and lower ends are located at different levels. This is intended for delivery of treating flowing medium directly from pipe to various strata of mass being treated. Single pipe can also run from ground surface into bore-hole down to level of upper boundary of mass being treated, and parallel pipes of various length are connected to lower end of pipe. In this case, lower ends of parallel pipes are located at different levels in respective strata to be treated. EFFECT: higher efficiency. 2 cl, 4 dwg
