NOUFERROUS METALLURGICAL EQUIPMENT

Addressing the issue of rock drilling jumbos being limited to drilling parallel to the tunnel face and unable to drill vertically for support holes and long anchor deep holes during underground tunneling, this paper presents a modification to the drilling jumbo’s propulsion beam to enable rod connection functionality for long anchor deep hole drilling. The modified Axera6-240 drilling jumbo features a propulsion beam with a total length not exceeding 4.3 and a drilling depth of 2.4m, capable of completing primary and secondary support drilling operations. Additionally, both the Axera6-240 and Atlas H282 drilling jumbos have been equipped with rod clamping devices on their propulsion beams, further enabling long anchor deep hole drilling, expanding the operational range of the drilling jumbos, and enhancing equipment utilization. This modification fulfills the requirement for long anchor support drilling at various depths using a short rod connection method, providing a technical guarantee for the long anchor support process.