普通硅酸盐-硫铝酸盐水泥复合薄喷材料的研发与应用  

Development and application of ordinary portland sulphoaluminate cement composite thin spray material

作　　者：梁紫栋 严国超[1] 白旭阳 柳梧泽 李岗 LIANG Zidong;YAN Guochao;BAI Xuyang;LIU Wuze;LI Gang(College of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学矿业工程学院,山西太原030024

出　　处：《中国矿业》2023年第7期158-164,共7页China Mining Magazine

基　　金：国家自然科学基金项目资助(编号:51974195)。

摘　　要：井下巷道喷涂材料存在喷涂厚度大、黏接性差、回弹率大、施工操作复杂等问题。针对上述问题,以硅酸盐水泥、硫铝酸盐水泥、粉煤灰、黏土为基料,配以黄原胶、纤维素醚等外加剂,研发出一种新型复合环保型薄喷材料。利用X射线衍射、扫描电镜、力学性能测试、接触角分析等手段与现有同类材料进行对比,并研究该材料各项性质及观察材料表面微观形态。通过现场应用,验证材料对巷道煤岩体裂隙的喷涂效果,研究结果表明:(1)新材料具有无毒、不可燃等性质,抗拉抗折强度高,可用于巷道的柔性支护;(2)材料晶相结构好、内部裂隙小、结构密实且煤岩体黏结力强;(3)材料疏水性较强,与水接触角可达154.74°,能够吸附微量的煤尘与瓦斯;(4)材料喷涂效果好,同一巷道中喷涂后10 h瓦斯含量为未喷涂的21%,可封堵瓦斯逸出,增大巷道支护强度。There are many problems such as large spraying thickness,poor adhesion,high rebound rate and complex construction operation in underground roadway spraying materials.In view of the above problems,uses portland cement,sulfoaluminate cement,fly ash,clay as the base material,with xanthan gum,cellulose ether and other admixtures to develop a new type of composite environmental protection thin spraying material.X-ray diffraction,scanning electron microscopy,mechanical property testing,contact angle analysis and other means are used to compare the existing similar materials,and the properties of the materials are studied and the microscopic morphology of the material surface is observed.Through field application,the spraying effect of the materials on the coal rock cracks in roadway is verified.The results show that the new material has non-toxic,non-combustible properties,high tensile and flexural strength,and can be used for flexible support of roadway.The material has good crystalline phase structure,small internal cracks,dense structure and strong adhesion to coal rock mass.The material has strong hydrophobicity,and the contact angle with water can reach 154.74°,which can absorb trace coal dust and gas.The material spraying effect is good.The gas content in the same roadway 10 h after spraying is 21%of that without spraying,which can block the gas escape and increase the roadway support strength.

关 键 词：薄喷材料 硅酸盐 硫铝酸盐 封堵瓦斯 巷道加固 

分 类 号：TD712.7[矿业工程—矿井通风与安全]