论文部分内容阅读
在锚喷支护作业中,水泥和骨料的运输、下料、拌料以及往喷射机上上料等,都将产生大量的粉尘,在喷浆的时候,由于压气的扩散,岩面涡流层的流动,混凝土的回弹等也有大量粉尘产生.据美国矿业局测定的资料,在锚喷班附近,小于5微米的粉尘浓度为16毫克/米~3、全尘浓度为44～94毫克/米~3.在喷射地点20～170米处测定,粉尘浓度为10～84毫克/米~3.据苏联资料介绍:搅拌机上拌料为5.6～40毫克/米~3,往喷射机上上料时一般为70毫克/米~3左右.在我国锚喷作业的粉尘浓度远大于此数,一般从几十毫克
In the anchor spraying and supporting operations, cement and aggregate transportation, cutting, mixing materials and to the jetting machine on the material, etc., will produce a lot of dust, when the shotcrete, due to the pressure of the proliferation of rock surface vortex layer According to the data measured by the US Bureau of Mines, the dust concentration of less than 5 microns is 16 mg / m ~ 3 and the total dust concentration is 44-94 mg / M ~ 3 at the injection site measured 20 to 170 meters, the dust concentration of 10 to 84 mg / m ~ 3. According to the Soviet Union introduced: mixing on the mixer for 5.6 to 40 mg / m ~ 3, to the jet feeding When the general 70 mg / m ~ 3. In our country anchor spray job dust concentration is much larger than this number, usually from tens of milligrams