摘要
充填开采是降低采动岩层运动破断高度及减小地面塌陷的重要途经,是解放压煤资源,实现煤炭资源高效开采和环境保护协同发展的重要方法。以山西神州煤业有限责任公司4604充填开采工作面为例,通过FLAC3D采动岩层沉陷规律仿真计算、浓浆充填工艺设计、地面沉陷现场实测相结合的方法,研究了浓浆充填对采动覆岩内部不同层为岩层及地表下沉的抑制作用。结果表明,该地质条件及粉煤灰浆液流动特性下固料质量分数为55%,三维数值仿真地表最大沉陷模拟结果为161.2 mm,与地表沉陷现场实测结果156 mm相一致;充填开采沉陷控制效果明显,有效保障了地面大型垃圾处理站、周边压煤村庄密集建、构筑物的安全使用。研究成果可为充填置换开采建筑物下压煤提供有益借鉴。
Backfill mining is an important way to reduce the fracture height and ground subsidence caused bystrata movement,release the covered coal resources,and achieve the coordinated development of coal mining and environmental protection.Taking the 4604 backfill mining face of Shenzhou Coal Industry as an example,we studied the inhibition of thick slurry filling on the subsidence at different strata and surface within the mining overburden by combining the simulation calculation of subsidence law with FLAC 3D,the process design of thick slurry filling,and the field measurement of subsidence.The results show that the reasonable slurry concentration is 55%under the geological conditions and fly ash slurry flow characteristics,and the maximum surface subsidence simulation result is 161.2 mm in 3D numerical simulation,which is consistent with the surface subsidence field measurement result of 156 mm.The effect of subsidence control is obvious,which effectively guarantees the safety of large waste disposal stations on the ground and dense buildings of the surrounding villages above the coal mine.The research results can provide a useful reference for filling replacement coal mining under buildings.
作者
武竹
WU Zhu(Taiyuan Coal Gasification(Group)Co.,Ltd.,Taiyuan 030024,China)
出处
《山西煤炭》
2023年第2期48-56,共9页
Shanxi Coal
关键词
开采沉陷
岩层移动
浓浆充填
流动特性
mining subsidence
strata movement
thick slurry filling
flow characteristics
