Femtosecond laser cutter and diamond cutter combined mining drill bit and mining method thereof

Abstract

The invention discloses a femtosecond laser cutter and diamond cutter combined mining drill bit and a mining method thereof. According to the femtosecond laser cutter and diamond cutter combined mining drill bit and the mining method thereof, on the basis of rigid mechanical rock breaking means of a traditional diamond drill bit, laser rock breaking means is adopted for assistance, femtosecond laser is focused in front of the drill bit, the original mechanical strength of the drill bit cannot be reduced, the laser is used for assisting in cutting and rock breaking in advance before ore makes contact with the drill bit, then the ore strength is greatly reduced, the loss of the diamond drill bit is reduced, moreover, the mining efficiency is improved, and the mining cost is further reduced;a laser probe and an electric adjusting frame are equipped and are uniformly controlled by a control system, the focal length is variable, cooperative focusing and coaxial focusing are achieved, and the mining requirements of various occasions are met to a great extent; and meanwhile, the femtosecond laser is adopted, the peak power is dozens of orders of magnitude higher than that of common continuous femtosecond laser, the rock breaking effect is better under the same power, a high-power laser device does not need to be adopted, so that the mining cost is reduced, and the laser rock breakingefficiency is improved.

Description

technical field [0001] The invention belongs to the field of mining devices, and in particular relates to a mining drill combined with a femtosecond laser knife and a diamond knife and a mining method thereof. Background technique [0002] Drilling is essential in stone exploration, mine mining and other projects, and diamond drill bits are widely used in drilling bits at this stage. The traditional diamond drill bit is greatly affected by the rock formation, and the wear is serious when operating in the rock formation with a large stiffness coefficient, and the drill bit is easily damaged. For this reason, people have developed a water jet diamond drill bit, which improves the efficiency of mining, but water jet mining needs to pressurize the entire circulation system, which may cause unimaginable dangers to the operation. At the same time, under the condition of high confining pressure in deep wells, the hydrodynamic pressure drops sharply and the energy utilization rate ...

AI Technical Summary

Problems solved by technology

Different from ordinary lasers, the femtosecond laser produced by it has the characteristics of high peak power, high positioning accuracy, and small heat-affected area. It is mainly used in medical technology and precision processing and other fields, and has not been widely used in drilling and mining engineering fields.

However, countries around the world have carried out research in this area. The US Phillipse Company used MIRACL lasers to conduct drilling tests. The laser beam can penetrate a 60mm thick sandstone-shale-sandstone interlayer within 1 second, and its penetration speed is higher than that of conventional drilling. Hundreds of times more expensive

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