关键词: 瓦斯抽采, 复合材料, 膨胀率, 凝固时间, 抗压强度

Abstract: This article introduces a kind of ordinary Portland cement and calcium sulphoaluminate cement clinker, gypsum and lime as the main composite gas drainage hole sealing material,and has determined the characteristics such as expansion rate, inflation time, coagulation time and intensity and so on.The research indicated, develops the compound materials have certain expansibility, fast congeals early strongly, can satisfy the gas to pull out picks the drill hole note thick liquid seal the request. Make it not only has high density of cement material, but also with the expansion of the polyurethane materials performance, and low cost.