针对水泥基注浆材料流动性低、凝结时间长、无法对孔壁提供主动支护力以及材料性能之间存在的互变关系不明确等问题,通过试验改变铝酸盐水泥的掺入量,探究铝酸盐水泥掺入量对材料流动性、凝结时间、膨胀量和抗压强度的影响,分析铝酸盐水泥在材料固化机理和膨胀机理中的作用,研究材料膨胀量与抗压强度之间的互变关系,通过试验配比优选3组材料进行工业性试验,得到适用于瓦斯钻孔封孔的注浆材料.结果表明:铝酸盐水泥通过参与材料水化反应,降低材料流动度、缩短材料凝结时间;铝酸盐水泥通过改变浆体的碱性环境和水化产物的生成量,控制材料膨胀量、提高材料强度;材料膨胀源主要来自于气相膨胀、钙矾石膨胀、氧化钙和氧化镁水化膨胀;材料的滞留气体能力是材料膨胀量与抗压强度之间的关系纽带.%According to a low fluidity and long setting time of the cement base grouting material,no active support force applied to the borehole wall,no clear interactive relationship between the material performances and other problems,with the experiment to change the mixed volume of the aluminous cement,the paper had a study on the mixed volume of the aluminous cement affected to the material fluidity,setting time,swelling rate and compressive strength and an analysis on the function of the aluminous cement in the material curing mechanism and the swelling mechanism.An interactive relationship between the material swelling volume and the compressive strength was studied.With the industrial tests conducted on the three group materials of the experiment mixing optimized selections,the grouting material suitable for the sealing of the gas drainage borehole was obtained.The results showed that with the material hydration reaction of the aluminous cement,the material fluidity and material setting time would be reduced.With the grout alkaline environment changed of the aluminous cement and the production of hydration product,the material swelling volume could be controlled and the material strength could be improved.The swelling source of the material were mainly from the gas phase swelling,the ettringite swelling and the hydration swelling of the calcium oxide and magnesium oxide.The gas retention capacity of the material would be the relation belt between the swelling volume and compressive strength of the material.
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