复杂地质矿区3种封孔工艺应用分析  

Application analysis of three kinds of hole-sealing technologies in mining area with complex geology

作　　者：王潞欧 谢雄刚[1,2,3] 赵先伟 李维翔 WANG Luou;XIE Xionggang;ZHAO Xianwei;LI Weixiang(Mining College,Guizhou University,Guiyang 550025,China;Engineering Center for Safe Mining Technology under Complex Geologic Conditions,Guiyang 550025,China;National&Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas,Guiyang 550025,China)

机构地区：[1]贵州大学矿业学院,贵州贵阳550025 [2]复杂地质矿山开采安全技术工程中心,贵州贵阳550025 [3]喀斯特地区优势矿产资源高效利用国家地方联合工程实验室,贵州贵阳550025

出　　处：《工矿自动化》2019年第11期49-54,共6页Journal Of Mine Automation

基　　金：国家自然科学基金资助项目(51864009);贵州省科技支撑计划项目(黔科合支撑〔2017〕2821)

摘　　要：复杂地质矿区水文地质条件较复杂,岩层孔/裂隙较发育,若采用的封孔工艺不合理,将导致煤层瓦斯压力测定结果不能准确反映煤层瓦斯实际情况的现象。针对上述问题,在贵州久益矿业股份有限公司宏宇煤矿5,6-1号煤层布置4组测压点、12个测压钻孔,每组测压点钻孔分别采用目前常用的注浆封孔、短胶囊+注浆封孔、长胶囊-压力黏液封孔3种封孔工艺进行瓦斯压力测定试验。根据试验结果分析了3种封孔工艺的应用效果,得出3种封孔工艺的适用条件:注浆封孔工艺适用于较深、岩石较细密且较坚硬的岩孔;短胶囊+注浆封孔工艺适用于倾角较大的下向钻孔;长胶囊-压力黏液封孔工艺适用于煤层顶底板岩石破碎或可能存在含水层处钻孔。The hydrogeological conditions in mining area with complex geology are more complicated,and the pores and cracks in rock seam are more developed.If sealing technology is not reasonable,the result of measured gas pressure in coal seam would not accurately reflect actual situation of gas in coal seam.For the problem,four groups of pressure measuring points with twelve pressure measuring boreholes are arranged in 5and 6-1 coal seams of Hongyu Coal Mine of Guizhou Jiuyi Coal Mining Co.,Ltd.for gas pressure measuring test,and boreholes in each group are sealed by use of three kinds of normal hole-sealing technologies including grouting hole-sealing,short capsule plus grouting hole-sealing and long capsule pressure mucus hole-sealing separately.Application effects of the three hole-sealing technologies are analyzed according to test results,and adaptation conditions are obtained as following:the grouting hole-sealing technology is applicable for deeper rock hole with finer and harder rock,the short capsule plus grouting hole-sealing technology is applicable for downward borehole with larger inclination angle,and the long capsule pressure mucus hole-sealing technology is applicable for borehole in roof and floor with broken rock or possible aquifer in coal seam.

关 键 词：煤层瓦斯压力 瓦斯压力测定 封孔工艺 注浆封孔 短胶囊+注浆封孔 长胶囊-压力黏液封孔 

分 类 号：TD713[矿业工程—矿井通风与安全]