煤炭工程 ›› 2013, Vol. 45 ›› Issue (6): 66-68.doi:

• 研究探讨 • 上一篇    下一篇

常村矿2103工作面顶板走向高抽巷合理层位的确定

朱红青,张民波,申健,冯世梁   

  1. 中国矿业大学(北京)
  • 收稿日期:2012-12-21 修回日期:2013-02-27 出版日期:2013-06-10 发布日期:2013-06-10
  • 通讯作者: 张民波 E-mail:zhangminbo2015@163.com

Determining the rational layer of high level gas suction roadway of 2103 working face along roof strike in ChangCun coal mine

  • Received:2012-12-21 Revised:2013-02-27 Online:2013-06-10 Published:2013-06-10

摘要: 为了防止常村矿2103工作面上隅角瓦斯超限,基于“O”形圈理论以及采空区上覆岩层裂隙发育规律,提出在其顶板布置高抽巷抽采采空区瓦斯。采用理论计算与数值模拟相结合的方法分析预测采空区上覆岩层裂隙发展规律,确定了主要裂隙发育带范围为22.9~36.6m;并通过现场测试单孔瓦斯抽采量与工作面的推进关系得到裂隙发育带范围为23.3~38.9m,验证了理论计算与数值模拟结果的正确性。为防止高抽巷被破坏,选取距离冒落拱的安全保险高度为1.5倍采高,将高抽巷层位设计为31.5~36.6m。

关键词: 高抽巷, “O”形圈理论, 裂隙发育带, 瓦斯抽采

Abstract: In order to prevent gas concentration exceeding limits at the upper corner of 2103 working face of ChangCun coal mine, based on the “O” circle theory and the fracture development laws of the depressing zones overlying a goaf, the high level gas suction roadway was excavated in the roof to extract gob gas. Theoretical calculation and numerical simulation method have been applied to analyze and predict the fracture development laws of the depressing zones overlying a goaf, and the main fracture zones has been determined as 22.9~36.6m. By testing the changed relationship between gas extraction pure quantity of single hole and working face advance on the site, the main fracture zones was 22.9~36.6m. The results of theoretical calculation and numerical simulation was proved. Aimed at preventing the roadway damaged, the safety height was chose as 1.5 times mining height and the layer of high level gas suction roadway was designed as 31.5~36.6m.

Key words: high level gas suction roadway, “O&rdquo, circle theory, fracture zones, gas drainage