基本顶局部切槽爆破沿空留巷方法
By setting up a blasting zone with a cutting angle and drilling holes with a negative angle inside the basic roof, a retaining structure is constructed along the roadway. This solves the problem of roadway stability and safety under the condition of small direct roof thickness and large basic roof thickness, and realizes efficient and safe roadway construction along the goaf.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TAIYUAN UNIVERSITY OF TECHNOLOGY
- Filing Date
- 2026-05-09
- Publication Date
- 2026-07-17
AI Technical Summary
When the immediate roof thickness is small and the basic roof thickness is large, the method of cutting the roof to form a self-contained roadway and leaving a roadway along the goaf has stability and safety issues. In particular, the collapsed gangue can easily impact the mining roadway and affect the stability of the gangue retaining structure next to the roadway.
A blasting zone is set up inside the basic roof, and the upper basic roof is retained as a buffer block. Anchor cable boreholes and blasting boreholes are constructed in the drilling site. Negative angle top cutting boreholes are used to construct a roadway retaining structure. The structure is anchored in the basic roof with anchor cables. The deformation of the steel mesh is monitored to adjust its position. Cyclic construction is carried out to complete the roadway retention along the goaf.
It improved the stability and safety of the tunnel, reduced the impact of falling gangue on the tunnel, ensured construction efficiency and safety, avoided narrowing the tunnel width, and enhanced the stability of the gangue retaining structure beside the tunnel.
Smart Images
Figure CN122169828B_ABST