1986年下半年,我矿引进了 AM-50型悬臂式掘进机。引进前曾考察了国内使用掘进机的矿山,防尘问题均未解决。国外虽有不同种类的捕尘器,但体积过大,价格昂贵,国内尚未引进。 In the second half of 1986, the mine introduced the AM-50 cantilever roadheader. Before the introduction of the inspected the domestic use of roadheader mines, dust problems are not resolved. Although there are different types of foreign dust catcher, but the volume is too large, expensive, not yet introduced.