(1. School of Energy Science and Engineering，Henan Polytechnic University，Jiaozuo，Henan 454000，China；2. State and Local Joint Engineering Laboratory for Gas Drainage and Ground Control of Deep Mines，Henan Polytechnic University，Jiaozuo，Henan 454000，China)
Abstract：In view of the shortcomings of traditional grouting materials and the current status that the coal dust is difficult to deal with in coal mine，the coal dust/polymer composite grouting material was developed in this study，which used the coal dust generated in process of underground drilling construction as filler，and supplemented by the bonding agent and some other additives. The performance of composite material were researched both in macroscopic mechanical properties and microstructural observation，the results show that there exists a suitable additive amount of coal dust in the composite material，too little amount of coal dust will limited the improvement of the composites strength，while too much will lead to the reduce in interfacial binding capacity between coal dust and resin matrix to form the internal defects in the material，and leading to an early damage and failure of the composites. The FTIR results also indicate that the reactions of hydrogen bond coating and the chemical grafting were happened inside the material. Thus，the surfaces of the coal dust were covered firmly by the resin matrix. By considering the cost of the composite material，the additive amounts of coal dust should be controlled at 30%，thus the composites has better mechanical properties and a good engineering application prospects.
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2019, Vol. 38 
