一种隧道破碎围岩中钻孔取芯装置及方法
The drilling device and method with a double-layer separable cylindrical structure solves the problems of hole collapse, hole deviation, and drill jamming in fractured surrounding rock, and achieves safe and efficient drilling and coring, which is suitable for drilling and coring in fractured surrounding rock in tunnels.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WUHAN UNIV
- Filing Date
- 2023-08-08
- Publication Date
- 2026-07-17
AI Technical Summary
Existing drilling equipment is prone to accidents such as hole collapse, hole deviation, and drill jamming in fractured surrounding rock, leading to core sampling failure and making it difficult to achieve safe and efficient drilling.
The system adopts a double-layer separable cylindrical structure, which is divided into two steps: integral drilling and separate core sampling. The outer protective cylinder protects the inner core sampling cylinder in the fractured rock layer to avoid hole collapse and deviation. After the inner core sampling cylinder is withdrawn, it brings out the rock core.
It improves the efficiency and success rate of drilling in fractured surrounding rock, ensuring the smooth progress of tasks such as anchor bolt installation in fractured surrounding rock, deep grouting in surrounding rock, and ground stress measurement. It has a simple structure, is easy to operate, and has a wide range of applications.
Smart Images
Figure CN117108227B_ABST