| Abstract:This paper briefly introduces the application background and working principle of the double wheel grooving machine, analyzes the misunderstanding of the pure milling method at the present stage, analyzes the disadvantages of the pure milling method in the hard rock working condition, and concludes that the pure milling construction under the hard rock working condition can not give full play to the core advantages of the double wheel milling equipment, and then puts forward a drilling and milling combination method applied to the hard rock grooving, The advantages of this combined construction method are analyzed, and based on the principle of parallel operation, the implementation method of the key work "drilling" of the construction method is emphatically introduced from the selection of the hole leading method, the hole leading arrangement and the hole diameter selection. Three kinds of drilling arrangement methods suitable for different diameters, different rock strengths and different drilling equipment are proposed. Combined with relevant cases, the practical application of the construction method and the beneficial effects achieved are verified and explained, At the end of the article, it expounds the purpose of "drilling" and "milling", and defines the primary and secondary relationship between them. |