摘要
为了满足巷道卧底出煤需要,需对巷道顶板构筑充填体假顶。针对巷道顶板条件、支护强度要求、巷道围岩变形实测规律,结合锚杆(索)支护强度理论、材料力学对假顶强度进行分析,并研究确定了构筑假顶的系统组成、充填材料、充填步距、充填空间支设、密封处理、充填工序等工艺。研究认为,充填体假顶设计强度不低于6.6MPa,充填材料采用黄土、河砂、胶结料、外加剂和水制备的膏状浆体材料,充填步距为10m,充填空间主要由脚手架、模板、弹性密封垫等搭接构成密封空间,模板与煤壁间的密封通过煤壁掏槽、密封垫实现。
Filling body false roof is needed to meet the requirements of roadway floor dinting. Aiming at roof condition, support strength requirement and the measured deformation law of roadway surrounding rock, false roof strength was designed combining with anchor bolt(cable) support strength theory and mechanics of materials, and the filling material, system composition, filling interval, space erection, sealing treatment, filling process were confirmed. The research suggested that, the strength of roadway filling body false roof should not be less than 6.6 MPa, and the filling material should be paste material that consisted of loess, river sand, cement, additive and water, the filling interval was 10 meters, the filling space was built by scaffold, form board, elastic gasket and so on, and the seal between the board and the coal wall was built by underholing and sealing gasket.
作者
马清水
孙万明
MA Qing-shui;SUN Wan-ming(Shenmu Longde Mining Co.,Ltd.,Yulin 719300,China;CCTEG Coal Mining Research Institute,Beijing 100013,China;Coal Mining and Designing Department,Tiandi Science and Technology Co.,Ltd.,Beijing 100013,China;Coal Mining and Designing Branch,China Coal Research Institute,Beijing 100013,China)
出处
《煤炭工程》
北大核心
2021年第6期7-11,共5页
Coal Engineering
基金
天地科技股份有限公司开采设计事业部技术创新基金(KG-2019-TDKCQN-05)
天地科技股份有限公司科技创新创业资金专项项目(2020-TD-QN007)。
关键词
巷道围岩
充填体
人工假顶
充填工艺
roadway surrounding rock
filling body
false roof
filling process
