煤炭工程 ›› 2013, Vol. 45 ›› Issue (9): 64-67.doi: 10.11799/ce201309024

• 研究探讨 • 上一篇    下一篇

采空区下煤层开采矿压显现规律实测研究

谷拴成1,陈盼1,王建文2,王宏科2   

  1. 1. 西安科技大学
    2. 陕煤集团神木柠条塔矿业有限公司
  • 收稿日期:2012-09-26 修回日期:2013-05-20 出版日期:2013-09-10 发布日期:2013-09-10
  • 通讯作者: 陈盼 E-mail:nang2005@126.com

Practical measure research on the law of strata behaviors to coal seam mining under goaf

  • Received:2012-09-26 Revised:2013-05-20 Online:2013-09-10 Published:2013-09-10

摘要:

在煤层群下行开采过程中,当两煤层间距较小时,上煤层开采形成的采空区必然会对下煤层工作面回采时的矿压显现规律产生显著影响,弄清楚近距离煤层采空区下工作面开采时矿压显现规律,对此类煤矿开采设备选型和安全高效生产有重要的指导意义。本文通过对陕煤集团神木柠条塔煤矿N1200工作面矿压规律实测数据分析,对比该工作面开采过程中上覆岩层中无采空区与有采空区的矿压显现规律,发现采空区下工作面有来压强度较大,大小周期来压交替出现,来压较突然等不同于常规工作面的矿压显现规律。在此基础上,利用相关矿山压力和岩层控制理论解释了采空区下工作面矿压显现规律的产生机理。

关键词: 煤层开采, 近距离煤层, 采空区, 矿压显现

Abstract:

During the process of top slicing under coal seam group,the goaf made by up coal seam exploited inexorablely has a great influence on law of strata behaviors of down coal seam working face in its stoping when the distance between coal seams is very close.Figuring out the law of strata behaviors of closer coal seam working face under goaf in its stoping has a important guiding significance to similar mines in equipment selection and safety,efficient production.Comparing the law of strata behaviors under goaf with that no goaf during working face stoping by analyzing the strata behaviors data of N1200 face in Shenmu Ningtiaota Coal Mining Company Ltd, Shaanxi Coal Mining Group, this paper shows the law of strata behaviors in different normal faces that the weighting strength is bigger under goaf,big and small periodic appears alternately and the strength appears suddenly.On this basis, the paper explains the generating mechanism of the law of strata behaviors in working face under goaf using relevant theories of mine pressure and strata control.

Key words: coal seam mining, close distance coal seams, goaf, strata behaviors

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