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Research Progress and Discussion on Modified Cement-Based Borehole Sealing Materials for Mining.
Bo Li1,2, Wang Jian1, Junxiang Zhang3,4,5
1School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454003, China.
ACS Omega
|April 24, 2023
Summary
Inorganic modified cement-based materials are crucial for sealing gas boreholes in coal seams. This study analyzes Portland cement (PC) and sulfate aluminate cement (SAC) modifications using additives to enhance performance.
Area of Science:
- Materials Science
- Mining Engineering
- Civil Engineering
Background:
- Green mining trends are shifting focus from organic to inorganic sealing materials.
- Portland cement (PC) and sulfate aluminate cement (SAC) are common but have limitations for gas borehole sealing in complex coal seams.
- Performance enhancement of PC and SAC is critical for effective mining operations.
Purpose of the Study:
- To explore the development of inorganic modified cement-based materials for mining applications.
- To analyze the modification of PC and SAC to improve their performance in sealing gas boreholes.
- To understand the effects of various additives on cementitious material properties.
Main Methods:
- Analysis of hydration products and their impact on PC and SAC properties.
- Investigation of additives (admixtures, coagulant regulators, nanomaterials) and their effects on hydration, setting time, and strength.
- Discussion of modification methods and underlying mechanisms.
Main Results:
- Characterization of PC and SAC hydration products and their property influences.
- Quantification of additive effects on cementitious material performance, including hydration, setting, and strength.
- Identification of optimal modification strategies for enhanced cementitious materials.
Conclusions:
- Modified PC and SAC show significant potential for gas borehole sealing in complex coal seams.
- Additives play a crucial role in optimizing the performance of cement-based sealing materials.
- Further research into modification optimization is vital for practical engineering applications in mining.
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