PREDICTING THE STATE OF THE ICE BARRIER OF A VERTICAL MINE SHAFT UNDER ARTIFICIAL THAWING

At the end of shaft penetration under protection ice barrier and termination process freezing rocks, transition period from to thawing begins. First all, tubing support trunk layer rocks adjacent concrete are subjected thawing. this time, water is pumped through grouting holes in check tightness column, after which performed with cement mortar fixed space. Thus, an integral part work on waterproofing support. For successful grouting, it necessary ensure by a value 1 m contour sinking. The defrosting can be provided various ways, including circulation warm air barrel, supply coolant columns, etc. A program for calculating parameters has been developed, depending combination methods supplying heated brine. It determined that order create reliable conditions production plugging fixing space water-proofing support, most favorable option feeding into barrel circulating at temperature +15°C.