摘要
研究了聚氨酯、普通水泥、新型钻孔密封材料的微观特性。实验模拟了煤矿井下钻孔封孔过程,利用FEI QuantaTM250环境扫描电子显微镜对聚氨酯、新型密封材料在钻孔周围的微观渗透进行对比分析;利用低场核磁共振设备对普通水泥浆体和新型密封材料浆体的T2分布进行对比分析。结果表明:新型密封材料相比聚氨酯材料有着较好的渗透力,可以有效的消除钻孔封孔段周围微观裂隙和孔洞,提高封孔段的稳定性;在2 h内新型密封材料浆液的流动性较普通水泥浆液更好;普通水泥中存在溶洞孔隙,而新型密封材料中只存在微裂缝。
The microscopic characteristics of a new type of sealing material,Portland cement and polyurethane for borehole are studied. Based on sealing process in the underground coal mine simulated by experiment,the permeability around boreholes of the new type of sealing material and the polyurethane material are compared through environmental scanning electron microscope FEI Quanta TM250,and T2 distribution of the new type of sealing material paste and common cement paste are analyzed by means of low field NMR equipment. The results show that the new type of sealing material has a better permeability than polyurethane material,which can effectively eliminate fractures around boreholes and improve the stability of sealing segment. Within 2 hours,due to a better liquidity feature,only micro fissures come out when the new type of sealing material is utilized while cavern porosities come out for common cement.
出处
《煤矿安全》
CAS
北大核心
2015年第11期17-20,共4页
Safety in Coal Mines
基金
国家重点基础研究发展计划(973计划)资助项目(2011CB201205)
国家自然科学基金科学仪器基础研究专款资助项目(51327007)
国家自然科学基金资助项目(51504189
51174158)
西安科技大学培育基金资助项目(2014058)
西安科技大学博士(后)启动金资助项目(2015QDJ035)
关键词
微观特性
密封性能
聚氨酯
普通水泥
新型密封材料
microscopic characteristic
sealing performance
polyurethane
Portland cement
new type sealing material
