一种煤矿用超前临时支护结构
By using an advanced temporary support structure composed of impact wedges, iron back plates, and anchor bolts in underground coal mine roadways, the problem of roof deformation and failure in traditional passive support methods has been solved, realizing active support and improving construction safety and reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUIZHOU PANJIANG REFINED COAL
- Filing Date
- 2025-06-23
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional passive support methods such as wooden props and metal friction props cannot actively adapt to roof deformation and are prone to failure due to roof subsidence or impact pressure, thus failing to meet the safety requirements of deep coal mining.
An advanced temporary support structure consisting of impact wedges, iron back plates, and anchor bolts is adopted. The impact wedges are inserted into the face of the working face and tied to the U-shaped canopy beam. Combined with the iron back plate and steel mesh, the anchor bolts are used for active support to form a stable temporary support system.
It improved the safety and reliability of construction during tunnel excavation and repair, and ensured the safety of life and property of construction workers.
Smart Images
Figure CN224515207U_ABST
Abstract
Claims
1. A temporary advance support structure for use in a coal mine, characterised in that, The system includes a wedge (1), an iron back plate (2), and an anchor bolt (3). The wedge (1) is a steel pipe with pointed ends (101) on both sides and holes (102) at the rear end. Multiple wedges (1) are inserted from below the U-shaped canopy beam at a set distance and abut against the face of the working face. The rear end is tied to the U-shaped canopy beam through the holes (102) with steel wire rope. The iron back plate (2) is installed below the steel mesh (6). The steel mesh (6) is installed between the wedge (1) and the roadway roof. The first anchor bolt (3) is installed 350mm from the edge of the U-shaped canopy along the roadway centerline. Two anchor bolts (3) are symmetrically installed on both sides of the first anchor bolt (3) to support the roof.
2. The temporary advance support structure for coal mines according to claim 1, characterized in that, The anchor bolts (3) are spaced 1200mm apart.
3. The temporary advance support structure for coal mines as claimed in claim 1 wherein, The anchor rod (3) is a right-hand threaded rod with a specification of φ20×1800mm. It is used with a tray (4) with a specification of 600×150×8mm and a matching stress nut (5). The end of the anchor rod (3) protrudes 10-100mm beyond the nut (5), and the torque of the nut at the end of the anchor rod (3) is not less than 400N·m.
4. The temporary advance support structure for coal mines as claimed in claim 1 wherein, The wedge (1) is made of 1.5-inch tubing.
5. The temporary advance support structure for coal mines as claimed in claim 1 wherein, The steel mesh (6) has a specification of 2.0×1.2m.