• 中文核心期刊
  • 中国科技核心期刊
  • RCCSE中国核心学术期刊

基于危险应力边界线的上覆巷道保护煤柱留设

李超, 郭文兵

李超, 郭文兵. 基于危险应力边界线的上覆巷道保护煤柱留设[J]. 煤矿安全, 2017, 48(7): 216-219.
引用本文: 李超, 郭文兵. 基于危险应力边界线的上覆巷道保护煤柱留设[J]. 煤矿安全, 2017, 48(7): 216-219.
LI Chao, GUO Wenbing. Protective Coal Pillar Designing for Overlying Roadway Based on Dangerous Stress Boundary Line[J]. Safety in Coal Mines, 2017, 48(7): 216-219.
Citation: LI Chao, GUO Wenbing. Protective Coal Pillar Designing for Overlying Roadway Based on Dangerous Stress Boundary Line[J]. Safety in Coal Mines, 2017, 48(7): 216-219.

基于危险应力边界线的上覆巷道保护煤柱留设

Protective Coal Pillar Designing for Overlying Roadway Based on Dangerous Stress Boundary Line

  • 摘要: 针对河南云煤一矿下部二1煤层21110工作面回采期间,上覆四2煤层21030工作面回风巷道损害严重问题,通过数值模拟分析21110工作面回采后覆岩移动变形和采动应力的特征,引入了危险移动边界线和危险应力边界线的概念。结果表明:通过岩层移动角留设在二1煤层75 m宽保护煤柱不能保证上覆21030工作面回风巷道的稳定性,上覆巷道破坏变形是由覆岩移动和采动应力共同决定的,而哪一方面占主导原因则由巷道所处覆岩中的位置决定,21030工作面回风巷道位于危险移动边界线以外危险应力边界线以内,采动应力是巷道破坏的主要原因,为此提出基于危险应力边界线留设上覆巷道的保护煤柱的方法。
    Abstract: Aiming at the problem of severe deformation of return airway in overlying Ⅳ2 coal seam 21030 face during the mining period of lower Ⅱ1 coal seam 21110 working face of Henan Yunmei No.1 Mine, the numerical model was applied to study the characteristics of overlying strata moving and stress after the 21110 working face has finished coal mining. The results show that the 75 m protective coal pillar which is remined in Ⅱ1 coal seam by strata movement angle can not afford the stability of overlying 21030 working face airway. Both overlying strata moving and stress lead to severe deformation of the overlying airway; which is the main reason depends on the position of roadway locating in the overburden. The airway of 21030 working face is within the line of dangerous stress boundary not the line of dangerous moving boundary, therefore, the mining stress is the main reason for deformation of the roadway. So, the method of designing protecting coal pillar for the above roadway based on the dangerous stress boundary line is proposed.
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  • 发布日期:  2017-07-19

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