Determination method for tunneling load of cutterhead of full face rock tunnel boring machine

Abstract

The invention discloses a determination method for a tunneling load of a cutterhead of a full face rock tunnel boring machine. The determination method comprises the following step of determining two parts including a tunneling thrust of the cutterhead and a tunneling torque of the cutterhead; the tunneling thrust of the cutterhead and the tunneling torque of the cutterhead are changed along the single-axis compressive strength of rock according to ratios, and are changed along a penetration degree and a diameter of the cutterhead according to a power function. With regard to the tunneling thrust of the cutterhead, the sum of power exponents of the penetration degree and the diameter of the cutterhead is 2; with regard to the tunneling torque of the cutterhead, the sum of the power exponents of the penetration degree and the diameter of the cutterhead is 3. The relation between the tunneling load of the cutterhead and each parameter is disclosed intrinsically, and the tunneling load of the cutterhead of the full cross-section rock boring machine under different geological conditions and operation states in a whole tunneling process can be calculated; foundation data is provided for designing a hard rock tunneling equipment driving and transmission system; meanwhile, evidences can also be provided for setting and real-time adjustment of thrust parameters and torque parameters in a construction process.

Description

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AI Technical Summary

Benefits of technology

The inventors found that each formula used by their researchers has its own advantages compared to previous methods like those described earlier. They also discovered how certain variables affecting cutting head loading were identified based on these formulas' dimensions or other technical features. This allows them to calculate more precise and consistently high values when considering different aspects related to tunnel engineering work. Overall, they provided an efficient way to measure and control the weight of fully-fledged rocks underground without relying solely upon physical measurements alone.

Problems solved by technology

This patented technical problem addressed by this patents relates to improving the efficiency and safety of fully face rock drilling machines used during urban or suburban roadway development operations due to their ability to efficiently create holes with minimal impact upon surrounding structures while maintaining precise dimensions. Current methods are slow and require manual intervention that can be expensive and prone to human errors.