SOUND SUPPRESSION MUFFLER OF UNDERGROUND MINE WORKING

摘要

FIELD: mining and construction engineering. SUBSTANCE: sound suppression muffler has lining panels 2 and intermediate panels 3 located along mine working walls. Intermediate panels are two-layer structure with closed air interlayers at ends. Each panel is assembled of highly porous blocks based on expanded clay aggregate gravel, fraction 5-10 mm in the form of filler, and cement of 400-500 grade taken in ratio of 4:1. EFFECT: higher efficiency of sound suppression under conditions of underground mine workings with low weight and low cost of manufacture. 2 dwg