煤炭工程 ›› 2013, Vol. 45 ›› Issue (10): 72-75.doi: 10.11799/ce201310025

• 研究探讨 • 上一篇    下一篇

梅花井矿601大采高工作面覆岩关键层及来压步距研究

孟志强   

  1. 河北工程大学资源学院
  • 收稿日期:2013-04-03 修回日期:2013-05-06 出版日期:2013-10-10 发布日期:2013-10-24
  • 通讯作者: 孟志强 E-mail:mengzq168@126.com

The study of key stratum and weighting interval of 601 great mining heihgt workface in Meihua Coal Mine

  • Received:2013-04-03 Revised:2013-05-06 Online:2013-10-10 Published:2013-10-24

摘要:

关键层运动对采场矿压显现、覆岩移动与地表沉陷及采动裂隙场分布有着重要的意义,为了确定梅花井矿关键层位置,本文采用矿压观测、岩石密度试验、单轴压缩及变形试验等方法,确定梅花井矿601大采高工作面覆岩力学性质和周期来压特征,并通过计算机编程计算硬岩和关键层。结果说明C6岩层为主关键层,C8为亚关键层,C6关键层步距为17.88m,与矿压观测结果对比,基本顶来压步距为13-26m,两者结果比较吻合。本文证明了利用地层岩性计算关键层是个较好的方法,可以比较容易地得到关键层资料,为采矿设计提供依据。

关键词: 关键层, 硬岩, 来压步距, 大采高

Abstract:

The key stratum movement has important significance to ground behavior of coal mining face, overlying strata movement, surface subsidence and fracture fields distribution. In order to confirm the position of key stratum, this paper adopts strata control observation, density test of rock, uniaxial compression, deformation test and other methods, and the mechanical properties of overlying rock strata and periodic weighting is confirmed on 601 great mining heihgt workface of Meihua Coal Mine, and the hard rock and key stratum are calculated through computer programming. The results show that the C6 formation is given priority to key layer and C8 formation is the key layer. C6 key layer interval is 17.88 m, contrast to observation results of mine pressure, main roof weighting interval is 18.25 m. Two kinds of results are consistent with each other.

Key words: key stratum, large cutting height, drawing pace, hard rock