Bionic Honeycomb Cemented Filling Material for Coal Mining
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Solution Overview
Problem
Cemented filling materials used in underground coal mining are prone to brittle damage under high stress, which compromises the stability of surrounding rock and leads to economic losses and safety hazards.
Innovation Solution
A strain-hardening energy-absorbing cemented filling material is developed using a bionic honeycomb skeleton created via 3D printing, filled with a cemented slurry composed of specific raw materials, enhancing the material's energy-absorbing characteristics and deformation performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional cemented filling materials are used to strengthen mechanical properties by densifying internal pore structure or strengthening cementing matrix, then strength is improved, but the material still exhibits strain softening behavior and brittle damage under high stress
Solution Approach 1:
The patent changes the fundamental mechanical response parameter from strain softening to strain hardening by introducing a bionic hierarchical pore structure. This structural modification enables the material to transition from brittle failure to progressive energy absorption, achieving both high strength and superior deformation performance under deep mining stress conditions
Solution Approach 2:
The patent creates a composite structure combining a bionic hierarchical pore skeleton with cemented filling matrix. This composite design integrates the load-bearing capacity of the strengthened matrix with the energy-absorbing capability of the optimized pore structure, resolving the contradiction between strength and deformation performance
2Strength
If anchors and cable supports are used to further strengthen the filling body, then strength is improved, but the complexity of the support system increases and brittle damage still occurs under prolonged high stress
Solution Approach 1:
The patent enables the filling material to self-absorb energy and self-adjust to stress through its bionic hierarchical pore structure. The material inherently provides strain hardening behavior without requiring external anchor or cable support systems, reducing system complexity while maintaining or improving support resistance
Solution Approach 2:
The patent utilizes a bionic hierarchical pore structure that is optimized for energy absorption. This porous design allows the material to progressively collapse and absorb energy under stress, providing sustained support resistance without the need for additional mechanical support elements
Data Source
AI summary
The present disclosure provides a cemented filling material with bionic structure, a preparation method and an application thereof, and belongs to the field of structural modification methods of cemented filling materials and research and development of civil materials with ultra-high energy absorption characteristics. The cemented filling material with bionic structure includes a bionic honeycomb skeleton and cemented filling slurry, where the cemented filling slurry is poured in the bionic honeycomb skeleton.