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1.前 言 企业家对采煤和巷道掘进工程等投入大量的资金,以促进技术的发展,因此,对由此而产生的井下环境保护措施问题,就成为下一步急需解决的课题。特别是对于粉尘,由于对它的特性的了解以及连定标准还不完善,所以,到现在还没有引起人们的足够重视。对我们肉眼可见的粉尘,也就是说人体对粒度为10微米以上的粉尘,具有优良的过滤装置(例如:鼻腔中的鼻粘毛的运动)。1微米以下的极小的尘粒,大多数也能随呼气排出体外,但是人体对于5—1微米看不见的微细尘粒却是完全无法防患的,这就是产生
1. Introduction Entrepreneurs invest large sums of money in coal mining and roadway tunneling projects to promote technological development. Therefore, the resulting underground environmental protection measures have become urgent problems to be solved in the next step. Especially for dust, due to its understanding of the characteristics and even the standard is not perfect, so far, has not attracted enough attention. The dust that is visible to us, that is to say the body, has excellent filtration devices (for example, the movement of nasal sticky hairs in the nasal cavity) for dusts with a particle size of 10 microns or more. The smallest dust particles below 1 micron, most of them can also be exhaled with exhaled breath, but the body is completely unable to prevent the tiny dust particles can not be seen 5-1 microns, which is produced