中梁山煤矿开采解放层二层煤时,由于煤层薄(平均层厚0.8米)瓦斯大,所以需要的风量大,加上被采落的煤炭沿60多度的倾角自溜,必然在支柱、挡板上不断碰撞,产生了大量煤尘。(据筛分测定:在采落的煤炭中,煤尘占6.91％～14.9％)而强大的风流财沿煤层倾斜上行遂将大量煤尘吹扬于工作面,甚至代到回风道。特别是,工作面遇断层时,需开断面约0.5～1.5m~2的小么洞来联通时,该处风速突升,达3米/秒以上,不但吹扬煤尘,甚至连大颗粒的煤粒也被吹起来打人,造成工作面对面不见人,睁不开眼睛,呼吸困难的恶劣局面,再加上干煤尘呛人,刺眼,大大地恶化了工作面的生产条件,影响了矿井的安全生产和工人健康。 Due to the large coal seam thickness (average thickness of 0.8 m), the large amount of wind required and the coal being mined and self-slipped along the inclination of more than 60 degrees must inevitably flow in the pillars, Continued collision on the baffle, resulting in a large number of coal dust. (According to the screening test, the coal dust collected accounted for 6.91% ~ 14.9% of the coal collected.) However, the strong wind-saving property sloshing up along the coal seam caused a large amount of coal dust blowing on the work surface and even substituting for the return air duct. In particular, the face of a fault, the need to open the cross-section of about 0.5 ~ 1.5m ~ 2 small hole to China Unicom, where the sudden rise in wind speed, up to 3 m / s, not only to promote coal dust, and even large particles Of the coal particles were also blown to hit people, leaving the work face to face no one can not open their eyes, poor breathing difficulties, coupled with dry coal dust choking, dazzling, greatly deteriorating the working conditions of the production surface, affecting Mine safety and worker health.