摘要
对于近距离煤层同时开采两层煤,煤柱的设置关系到煤层压力的稳定。某矿由于煤层距离较近(9m),根据之前煤柱宽度及回采宽度的论证,采取采40m留设30m煤柱的方案。文中结合数值模拟,对该方案的开采关键参数进行了校核,使下层煤条带开采时煤柱塑性区宽度、煤柱垂直应力分布、地表变形均在要求的范围内,为其他同类采区开采设计提供借鉴。
The coal pillar design is relevant to the stability of seam pressure in extracting two levels of coal simul taneously in close--distance seam. According to the demonstration of the original pillar and mining width in the 9--meter--distance coal seam, the paper introduces the mining design of "extracting 40 meters and setting 30-- meter pillar", whose key mining parameters have been verified by numerical simulation with the plastic zone width of pillar, vertical stress distribution of pillar and surface deformation in standard requirements.
出处
《江西煤炭科技》
2015年第2期32-34,共3页
Jiangxi Coal Science & Technology
关键词
近距离煤层
条采工作面
开采参数设计
close--distance seam
partial extraction working face
mining parameter design