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在煤矿生产建设中,掘进与锚喷支护产生的粉尘,威胁井下人员的身体健康,降低掘进效率,近年来甚致影响了锚喷支护技术的推广使用。下面仅就掘进、锚喷作业的降尘问题谈些意见。一、掘进防尘根据《煤矿安全规程》第450条规定,井下有人工作的地点和人行道的空气中,粉尘浓度不得超过下列规定:粉尘中含有游离二氧化硅<10％时10毫克/米~3粉尘中含有游离二氧化硅>10％时2毫克/米~3在煤矿各类岩层中,游离二氧化硅的含量一般为30～70％不等。据萍乡煤矿测定,石英质砂岩、砂岩、页岩和砂质页岩中游离
In the coal mine production and construction, the dust generated by tunneling and bolting and shotcreting threaten the health of miners and reduce the efficiency of tunneling. In recent years, this has greatly affected the popularization and application of bolting and shotcreting technology. The following only on the tunneling, anchor spray operations to talk about the issue of dust. According to the provisions of Article 450 of Coal Mine Safety Regulations, the concentration of dust in the underground working place and sidewalk air shall not exceed the following requirements: dust containing 10% of free silica <10% 3 Dust contains free silica> 10% 2 mg / m ~ 3 In all types of coal mines, the content of free silica is generally 30 to 70%. Pingxiang Coal Mine, according to the determination, quartz sandstone, sandstone, shale and sandy shale free