Mechanical Anchor for Double Cable Bolts With Dual Retention Holes
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Solution Overview
Problem
Existing mechanical anchor devices for cable bolts do not provide adequate load bearing capacity, leading to potential cable bolt failure and instability in excavations, and using larger diameter cables is costly and difficult to tension.
Innovation Solution
A mechanical anchoring device with a configuration comprising expansion leaves, a retention barrel, and a connecting device that allows two cables to be anchored together, ensuring improved load capacity and stability by engaging the rock strata through tensioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a single cable with larger diameter is used to increase load bearing capacity, then the load capacity is improved, but the cost increases disproportionately and the cable becomes less flexible and more difficult to tension
Solution Approach 1:
The invention divides the single large-diameter cable into multiple smaller-diameter cables (typically three) that are anchored together using a mechanical anchor device with multiple retention barrels. This segmentation allows each cable to be tensioned independently and more easily, while collectively providing the required load bearing capacity through combined action of multiple cables working in parallel
2Strength
If two separate mechanical anchor devices are used to anchor two cables, then the load capacity is improved, but the device complexity increases and the risk of cable entanglement increases
Solution Approach 1:
The invention merges multiple retention barrels into a single integrated mechanical anchor device that can anchor multiple cables simultaneously. The device includes a common body structure with multiple retention barrels arranged around a central axis, allowing multiple cables to be anchored together in one operation rather than requiring separate anchor devices for each cable
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances the load-bearing capacity of cable bolts, providing safer and more stable excavations while being cost-effective and avoiding entanglement issues with multiple cable systems.
Implementation Method 1
an expansion head in the form of a plurality of expansion leaves, for engaging rock strata
Implementation Method 2
The cable bolt is then tensioned to provide bearing capacity
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A mechanical anchoring device (1) for cable bolts comprising: an expansion head (3) in the form of a plurality of expansion leaves (4), for engaging rock strata, at an axially trailing end (22) of the mechanical anchoring device (1), a retention barrel (2) located at an axially smaller distance to a leading end (21) of the mechanical anchoring device (1) than the distance between the expansion head (3) and the leading end (21) of the mechanical anchoring device (1), a connecting device (14) connected to each of the expansion leaves (4), and wherein the retention barrel (2) comprises a first (5) and a second (6) through hole for receiving a cable in each of the first (5) and second (6) through hole.