煤矿粉尘光损耗与消光系数问题的探讨

Research on Light Losses and Extinction Coefficient of Coal Dust

粉尘消光系数是反映粉尘光吸收特性的重要参数。在自由空间和滤纸吸附两种条件下探讨了粉尘的光损耗问题，并导出了消光系数的表达式，得到了一致的结论：消光系数只与尘样的尘粒密度和其归一化粒度分布函数ｆ（ｒ）有关，而与通光面积等外界因素无关，并对非等精度条件下获得的实验数据进行了处理，验证了所得结论。

The extinction coefficient of dust is an important parameter reflecting the optical absorption character of dust. The expression formula of the extinction coefficient of dust was obtained when the dust was in free space and when it was absorbed in filter paper. Both circumstances yielded the same concluston:the extinction coefficient is related to the density of particals and normalized partical size distribution function f(r) of dust sample, and is not related to external factors such as effective filter paper area that the light passes through a set of experiment data obtained under unequal precision condition was processed.