论文部分内容阅读
大气压力波动引起矿井内空气压力的变化,进而对矿井瓦斯涌出、火区管理、均压效果、主要通风机通风等通风安全产生影响。理论分析了矿井气压变化与瓦斯涌出的关系,并在综放工作面进行了实证研究。试验结果表明大气压力急剧变化能对矿井采空区和煤层瓦斯的扩散与运移产生影响,在特定条件下,大气压力的变化有可能造成瓦斯成倍增加,足以威胁煤矿安全生产,应给与足够重视;另外也发现瓦斯气体的波动一般滞后于大气压力变化0.5~1.0 h,这为应对措施提供了时间。
Atmospheric pressure fluctuations cause changes in the air pressure in the mine, and then mine gas emission, fire area management, pressure equalization, the main ventilator ventilation and other ventilation safety impact. The relationship between gas pressure change and gas emission in mine is theoretically analyzed, and the empirical study is carried out in fully mechanized coal caving face. The test results show that the sudden change of atmospheric pressure can affect the gas diffusion and migration in the goaf and coal seam. Under certain conditions, the atmospheric pressure may increase the gas doubled enough to threaten the safety of coal mines. Pay enough attention to it. In addition, it is also found that the fluctuation of gas gas generally lags behind the atmospheric pressure by 0.5-1.0 h, which provides time for response measures.