摘要
为了有效避免矿井巷道内的有害气体和粉尘的体积聚,现对锚网索支护、锚喷支护、平整壁面支护3种不同支护形式下的巷道内进行巷道断面风速的测量,研究不同支护方式下巷道断面风流速度分布规律。通过现场实测发现:巷道壁面的粗糙度越大,巷道内低风速区域越大;巷道壁面及障碍物附近的风速较低,巷道中部的风速较高;巷道内的平均风速越大,低风速区域越小。因此,对于顶板及两帮较为粗糙的支护形式下的巷道,应认真评估其低风速区域,避免造成有害气体的积聚,必要时应采区加大风量或修整壁面来保证矿井的安全生产。
In order to effectively avoid the accumulation of harmful gases and dust in the mine roadway, the wind speed measurement of the roadway section in the roadway with three different support forms, such as anchor cable support, anchor spray support and flat wall support, is studied. Distribution law of wind flow velocity in roadway section under different support modes. Through on-site measurement, it is found that the greater the roughness of the roadway wall, the larger the low wind speed region in the roadway;the wind speed near the wall and obstacles of the roadway is lower, the wind speed in the middle of the roadway is higher;the average wind speed in the roadway is larger, and the low wind speed region The smaller. Therefore, for the roadway under the top plate and the two rougher support forms, the low wind speed area should be carefully evaluated to avoid the accumulation of harmful gases. If necessary, the mining area should increase the air volume or repair the wall to ensure the safe production of the mine.
作者
乔安良
QIAO Anliang(Shanxi coking Coal Group Huozhou Coal Power Group Safety Supervision Bureau,Shanxi Huozhou 031400)
出处
《煤矿现代化》
2020年第3期157-159,共3页
Coal Mine Modernization
关键词
矿井通风
低风速区域
支护方式
风速分布
Mine ventilation
Low wind speed zone
Support method
Wind speed distribution
