采矿与安全工程学报 ›› 2016, Vol. 33 ›› Issue (3): 467-474.

• 论文 • 上一篇    下一篇

活鸡兔井极近距离煤层煤柱下双巷布置研究

  

  1. 1.西安科技大学能源学院,陕西 西安 710054;2.神华神东煤炭集团有限责任公司大柳塔煤矿,陕西 神木 719300;3.中国矿业大学矿业工程学院,江苏 徐州 221116
  • 收稿日期:2015-10-20 出版日期:2016-05-15 发布日期:2016-06-03
  • 作者简介:陈苏社(1966—),男,陕西省西安市人,教授级高级工程师,博士研究生,从事煤矿安全开采及水资源保护技术方面的研究。
  • 基金资助:

    国家重点基础研究发展计划(973)项目(2013CB227900)

Study on double-roadway layout under section coal pillar of ultra-close upper coal seams in Huojitu mine

  • Received:2015-10-20 Online:2016-05-15 Published:2016-06-03

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。

关键词: 极近距离煤层, 区段煤柱, 双巷布置, 浅埋煤层

Abstract: 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.

Key words: ultra-close coal seams, section coal pillar, double-roadway layout, shallow coal seam