Pumpable Crib Bag Helical Wire Reinforcement
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Solution Overview
Problem
Conventional crib bags used for mine roof support often fail under increased stress, as they lack sufficient deformation stability and load-bearing capacity, leading to inadequate support in varying mining conditions.
Innovation Solution
A pumpable crib bag design featuring a body with helically extending reinforcing wires made from materials like steel, fiberglass, or polymer, along with a void mechanism to enhance deformation and load support, and a unique welding process to maintain structural integrity while allowing radial expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional crib bags are used for mine roof support, then the structure is simple and easy to manufacture, but the load-bearing capacity and deformation stability are insufficient under increased stress
Solution Approach 1:
The crib bag employs a composite structure combining fabric body with helical reinforcing wires made of high-strength materials. This composite construction integrates the flexibility and containment capability of fabric with the tensile strength and structural rigidity of metal wires, enabling the bag to withstand increased stresses and deformations while maintaining load-bearing capacity.
Solution Approach 2:
The reinforcing structure is segmented into multiple helical wires distributed throughout the fabric body. These wires are positioned at strategic locations to provide localized reinforcement where stresses are highest, allowing the structure to handle complex loading conditions while maintaining overall structural integrity.
2Adaptability or versatility
If the crib bag allows greater deformation to support varying mining conditions, then the adaptability increases, but the structural stability may be compromised
Solution Approach 1:
The crib bag is designed with dynamic characteristics that allow it to adapt to changing mining conditions. The helical wire configuration and fabric construction enable the bag to deform radially and longitudinally in response to roof convergence and stress variations, while the distributed wire reinforcement maintains structural coherence throughout the deformation process.
Solution Approach 2:
The structural parameters of the crib bag, including wire diameter, wire spacing, and fabric thickness, are optimized to balance deformation capability with structural stability. These parameters can be adjusted based on specific mining conditions to achieve the desired level of adaptability while preventing structural failure.
Data Source
AI summary
A pumpable crib bag may include a body defining a longitudinal axis, at least one reinforcing wire helically extending about the longitudinal axis and along a length of the body, and at least one pocket configured to hold the at least one reinforcing wire therein. The at least one reinforcing wire may include a first material and a second material.