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井巷施工中推广喷射混凝土支护,是一件先进的技术,不但能降低成本,而且还可以提高建井速度、减轻工人劳动强度、提高工程质量。但是,喷射混凝土时的粉尘是一个必须引起注意的问题。据有关资料统计,在平巷、斜井施工中采用喷射混凝土时,粉尘达到600毫克/米~3,经过采取技术措施后,最好的单位达到108克/米~3。这距离国家要求标准10毫克/米~3相差甚远。这对于工人身体健康是
Sprayed concrete support in the roadway construction is an advanced technology that can not only reduce the cost, but also improve the speed of well construction, reduce the labor intensity of workers and improve the quality of the project. However, dusting shotcrete is a problem that needs attention. According to relevant statistics, the dust reaches 600 mg / m ~ 3 when sprayed concrete is used in roadway and inclined shaft construction. After the technical measures are taken, the best unit reaches 108g / m ~ 3. This is a far cry from the national standard of 10 mg / m ~ 3. This is for the health of workers is