Shaft Boring Cutterwheel Multi-Axis Rotation for High Sinking Rate
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Solution Overview
Problem
Existing methods for introducing vertical shafts underground using shaft boring machines have limitations in achieving a high sinking rate, as they often rely on continuous rotation of a cutterwheel about a horizontal axis, which can be inefficient in excavating a shaft floor wider than the cutterwheel diameter.
Innovation Solution
The method involves a two-step sinking process where the cutterwheel is first rotated about the horizontal axis to penetrate the ground, and then rotated about the central vertical axis while maintaining depth, equipped with excavation tools to enhance the sinking rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the cutterwheel is continuously rotated about the horizontal axis only, then the shaft floor is excavated in a substantially even manner, but the sinking rate is relatively low
Solution Approach 1:
The cutterwheel is equipped with excavation tools that can perform different rotational movements dynamically. The system transitions from static horizontal rotation to dynamic multi-axis rotation (horizontal and vertical axes) to adapt to different excavation stages, thereby improving sinking rate while maintaining floor evenness through controlled tool positioning.
2Productivity
If the cutterwheel diameter is reduced to increase sinking rate, then the excavation efficiency improves, but the ability to excavate shaft floor wider than cutterwheel diameter is limited
Solution Approach 1:
The excavation process transitions from two-dimensional horizontal rotation to three-dimensional multi-axis rotation by adding vertical axis rotation capability. This dimensional expansion allows the cutterwheel to reach and excavate areas beyond its diameter while maintaining efficient sinking rate through optimized tool path geometry.
3Productivity
If the cutterwheel is equipped with multiple excavation tools for multi-axis rotation, then the sinking rate increases, but the device complexity increases
Solution Approach 1:
The cutterwheel is designed as a multi-functional device that can perform both horizontal and vertical axis rotations with various excavation tools. This universal design allows a single device to handle different excavation scenarios and shaft conditions, improving sinking rate while avoiding the need for multiple separate equipment systems.
Data Source
AI summary
The invention relates to a method for introducing a vertical shaft underground and to a shaft driving machine set up particularly for performing the method, wherein a cutting wheel is rotated solely about a horizontal axis until a penetration trough having a predetermined penetration depth is formed, and the cutting wheel is then also rotated about a central vertical axis until a shaft foot is dug out to the penetration depth. A relatively high sinking rate is thereby achieved for the shaft.