Hollow Rod Shear Connector Static Mixing for Adaptive Rock Stabilization
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Solution Overview
Problem
Existing methods for stabilizing rock strata in mining and construction often result in oversized anchors that are not optimally adapted to the specific rock conditions, leading to increased material and personnel costs, and safety risks due to non-adaptive anchor settings.
Innovation Solution
A hollow rod composite anchor with a static mixing device and a two-part squeezing plunger, designed to efficiently mix and apply chemical fastening agents, allowing for precise adjustment of fastening strengths based on rock conditions, using a static mixer with multiple mixing elements that change the flow direction of the adhesive twice between 150° and 210°, ensuring uniform bonding and reduced backpressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional oversized anchors are used for stabilizing rock strata, then safety and reliability are improved, but material costs and personnel costs increase
Solution Approach 1:
The patent applies parameter changes by enabling continuous adjustment of the adhesive mixture ratio (component A and component B) through variable section mixing elements. This allows optimization of adhesive properties for different rock conditions, eliminating the need for oversized standardized anchors while maintaining reliable stabilization. The mixing ratio can be adapted to achieve optimal bond strength without excess material consumption.
Solution Approach 2:
The patent implements dynamics through the variable section mixing elements that can be adjusted during the grouting process. The mixing section length and element configuration can be changed adaptively based on rock stratum conditions, allowing the system to optimize performance in real-time rather than relying on fixed oversized anchors for all scenarios.
2Ease of operation
If traditional standardized anchors are used, then ease of installation is improved, but adaptability to different rock conditions deteriorates
Solution Approach 1:
The system maintains ease of operation through standardized hollow rod anchor components while introducing dynamic adaptability via adjustable mixing elements. The mixing section can be configured with different numbers and types of mixing elements (first, second, third mixing elements) to adapt to various rock conditions without changing the basic installation procedure.
Solution Approach 2:
The patent applies local quality by allowing different mixing element configurations in specific sections of the hollow rod anchor based on local rock conditions. The variable section mixing elements can be tailored to match specific rock stratum characteristics at different depths, while the overall anchor system remains standardized for easy installation.
3Quantity of substance
If non-adaptive anchors are used, then material costs are reduced, but work safety and reproducibility deteriorate
Solution Approach 1:
The patent enables cost-effective adaptive anchoring by allowing adjustment of adhesive mixture parameters (ratio of components A and B, mixing section length) based on actual rock conditions. This avoids the waste of material from using oversized non-adaptive anchors while ensuring work safety through optimized bond strength matching the specific rock stratum characteristics.
4Adaptability or versatility
If complex mixing systems are used to adapt to rock conditions, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the mixing device into modular mixing elements (first, second, third mixing elements) that can be independently configured. This segmentation allows adaptability through simple addition or removal of mixing elements rather than complex integrated systems, maintaining device simplicity while achieving rock condition adaptability.
Solution Approach 2:
The system achieves adaptability with minimal complexity increase through dynamic configuration of a small number of mixing elements. The variable section can be adjusted by changing the number and arrangement of mixing elements rather than using complex continuous adjustment mechanisms, keeping the device relatively simple while maintaining high adaptability.
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 enables rapid, reproducible, and safe stabilization of rock structures with reduced effort, allowing for flexible use of various fastening compositions and precise adjustment of fastening strengths, reducing process time and enhancing work safety.
Implementation Method 1
the flow direction of the chemical fastening agent is changed at least twice along the static mixing device by greater than or equal to 150° and less than or equal to 210°
Implementation Method 2
a hollow rod composite anchor for stabilizing rock strata... comprising an anchor base... and a hollow rod which can be attached to the anchor base
Data Source
AI summary
The disclosure relates to a hollow rod shear connector for stabilizing rock layers in mining, tunnel construction, civil engineering and rock construction, at least having a connector base with one or more outlet channels and a hollow rod which can be fastened to the connector base and comprises a static mixing apparatus adjoining the connector base, a cartridge, divided by a partition into two compartments, for receiving chemical fastening means, and a two-part plunger corresponding to the compartment division, wherein the static mixing apparatus consists of a plurality of mixing elements one behind the other, wherein the flow direction of the chemical fastening means is changed by greater than or equal to 150° and less than or equal to 210° at least twice along the static mixing apparatus. The present disclosure also relates to a method for setting a hollow rod shear connector in a rock layer.