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澳大利亚卡亭埃杰技术公司与勃拉姆勒斯煤炭服务公司、美国螺旋钻采煤机制造商布莱德特开发公司共同开发一种露天矿边坡开采系统,该开采系统能够开拓并保持稳固的平巷,并能以15°的倾角运作.该螺旋钻采煤机将煤层采掘成椭圆形断面,具有最强的自承重能力,在厚为3m的煤层中可实现50%以上的回采率.这种螺旋钻采煤机还具有以下特性,提高了对劣质地面耐受度,钻透厚度大于200 mm,能采掘1.5～4.5 m厚的煤层,年生产能力高于100万t.该设备还能够在较厚煤层中开拓平巷.
Cathay Eager Technologies of Australia, in collaboration with Bromus Coal Services and Bradley Development Inc., a U.S. manufacturer of auger shearers, has developed an open pit mine slope mining system that can develop and remain robust Of the roadway and can operate at an inclination of 15 ° .The auger coal mine excavation of the coal seam into an oval section, with the strongest self-bearing capacity of coal seam thickness of 3m can be achieved more than 50% of the recovery rate The augers also have the following features to improve the resistance to poor ground resistance, with a penetration of more than 200 mm, and the ability to excavate seams from 1.5 to 4.5 m thick, with an annual production capacity of more than 1 million t. Also be able to open up lanes in thick seam.