摘要
以柳林郭家山煤矿4217综放工作面(回收上山煤柱)过空巷为工程背景,建立了基于工作面超前采动影响的空巷顶板力学模型,分析了空巷顶板稳定性与空巷充填体相互作用关系,得到了空巷顶板稳定的充填体支护阻力计算式,确定空巷充填体的支护阻力不低于3.58 MPa,提出采用高水材料充填过空巷技术:1)高水材料浆液可对空巷周围破碎煤岩体与空间胶结形成整体结构,提高对顶板的支撑作用;2)采用高水材料水灰比2.5∶1能满足支护空巷顶板强度要求,保证顶板不发生滑落失稳和回转变形失稳。工程应用表明,高水材料充填空巷保持了煤壁和顶板的稳定性,是安全快速过空巷的有效途径之一。
Taking No.4217 fully mechanized caving face crossing abandoned roadway of Guojiashan Coal Mine（uphill pillar recovery） in Liulin as a case study,a mechanical model of abandoned roadway roof subjected to advance mining influence was established,and support resistance was derived based on interaction relations between roof stability and backfill body in abandoned roadway.The support resistance of backfill body in the abandoned roadway is more than 3.58 MPa.The technology of backfilling abandoned roadways with high moisture quick-setting material is put forward：1） High moisture quick-setting backfill material grout can cement both the broken coal/rock and cracks around the abandoned roadway together into an integral structure,improving the load-bearing capacity of surrounding rock;2） The strength of backfill material（Water cement ratio is 2.5：1） not only meets strength requirement of supporting the abandoned roadway roof,but also avoids main roof slide and rotation deformation.Field test shows that the application of high moisture quick-setting backfill material in abandoned roadway can keep the roof and ribs stability.It provides an effective approach to make the working face pass through an abandoned roadway quickly and safely.
出处
《采矿与安全工程学报》
EI
北大核心
2013年第2期194-198,共5页
Journal of Mining & Safety Engineering
基金
国家自然科学基金项目(51174195,51204166,51204167)
江苏高校优势学科建设工程项目
关键词
空巷
超前采动影响
高水材料
充填
充填体支护阻力
abandoned roadway
advance mining influence
high moisture quick-setting material
backfill
support resistance of backfill body
