摘要
针对大柳塔煤矿活鸡兔井极近距离煤层同采工作面回采巷道的合理布置问题,采用数值模拟及现场实测方法,就层间距小于2 m极近距离煤层煤柱下的双巷布置进行了研究。结果表明:当区段煤柱宽度为20 m时,煤柱下双巷布置适用的埋深应小于100 m;当区段煤柱宽度为35 m时,煤柱下双巷布置适用的埋深应小于150 m。据此,将活鸡兔井三盘区极近距离煤层双巷布置于35 m宽的区段煤柱下,实际使用后巷道历经3次采动影响的累积变形量仅为50 mm,巷道无需维护即能保持正常安全使用,为类似浅埋极近距离煤层的安全高效开采提供参考。
The rational layout of mining roadways below upper synchronously mining longwall faces under the condition of ultra-close coal seams is the key issue for the safe operation in Huojitu coal mine. To overcome this critical challenge, this paper studied the double-roadway layout under the upper section coal pillar in less than 2 m interval coal seams through numerical simulation and field measurement.It is showed that when the widths of section coal pillars are 20 m and 35 m, the maximum cover depths of lower double-roadway are 100 m and 150 m, respectively. By placing the double-roadway under the upper 35 m-wide section coal pillar in No.3 panel of Huojitu mine, the deformation of the roadway is only 50 mm totally in spite of 3 times mining influence. The roadways can be in safe and normal use without maintenance. This provides reference for safe and efficient mining under the similar shallow ultra-close coal seams condition.
出处
《采矿与安全工程学报》
EI
CSCD
北大核心
2016年第3期467-474,共8页
Journal of Mining & Safety Engineering
基金
国家重点基础研究发展计划(973)项目(2013CB227900)
关键词
极近距离煤层
区段煤柱
双巷布置
浅埋煤层
ultra-close coal seams
section coal pillar
double-roadway layout
shallow coal seam
