| 摘要 |
FIELD: mining, particularly devices to localize methane and/or coal dust explosion and to suppress underground coal mine fires caused by methane and/or coal dust explosions. ^ SUBSTANCE: fire barrier is freely installed so that it may be displaced in both directions from vertical line. The partition is suspended inside recess made in upper mine part and is connected to flexible tie provided with fixing means. The flexible tie passes over pulley with fixed axle and over deflecting roll and is connected with retaining lever. The first lever side is supported by deflecting toll. Another end thereof is secured to rod of explosion indicating flag. The rod has figured groove made as turning. ^ EFFECT: increased rate of blast wave propagation suppression and explosion site isolation. ^ 2 dwg |
