Research on cement-based chemical composite materials suitable for mine water prevention and control
During the mining process of deep coal mines,accidents such as tunnel water inrush are highly likely to occur,in order to solve the problems strong brittleness,poor toughness and weak impermeability of traditional cement-based support materials,a modified polymer lotion PVEA-1 was prepared with vinyl acetate and polyvinyl alcohol as main raw materials,under the action of emulsifier OP-10 and SDS,and was combined with cement,fly ash,sand and PVA fiber,A new type of cement-based chemical composite material has been prepared.The basic physical properties,mechanical properties and impermeability of cement-based chemical composites were investigated.The results show that the modified polymer lotion PVEA-1 can effectively improve the fluidity and water retention rate of cement-based chemical composites.With the increasing of PVEA-1 dosage,the compressive strength of cement-based chemical composites gradually decreases,the flexural strength first increases and then decreases,the compression bending ratio first decreases and then increases,and the water absorption gradually decreases.When the dosage of PVEA-1 is 8%,the comprehensive performance of cement-based chemical composite material is good,with high toughness and impermeability,and can be used as a support material for water prevention and control in deep coal mines.
deep coal minesprevention and control of watermodified polymer lotioncement based composite materialsperformance evaluation
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