东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2009, Vol. 30 ›› Issue (9): 1326-1329.DOI: -

• 论著 • 上一篇    下一篇

煤和瓦斯突出过程中地应力作用机理

段东;唐春安;李连崇;冯小静;   

  1. 东北大学资源与土木工程学院;大连理工大学土木水利学院;煤炭科学研究总院沈阳研究院煤矿安全技术国家重点实验室;
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2009-09-15 发布日期:2013-06-22
  • 通讯作者: Duan, D.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(40638040,10672028,50504003);;

Study on the mechanism of ground stress in coal-gas outburst

Duan, Dong (1); Tang, Chun-An (1); Li, Lian-Chong (2); Feng, Xiao-Jing (3)   

  1. (1) School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China; (2) School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China; (3) State Key Laboratory of Mine Safety Technical, Fushun Branch of China Coal Research Institute, Shenyang 110016, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2009-09-15 Published:2013-06-22
  • Contact: Duan, D.
  • About author:-
  • Supported by:
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摘要： 基于岩石破裂损伤理论和气固耦合方法,利用RFPA2D-GasFlow数值模拟系统,结合煤体中应力分布情况和瓦斯突出破坏过程及结果,分析了煤与瓦斯突出三要素(地应力、瓦斯和煤体物理力学性质)中的地应力在瓦斯突出过程中的作用.研究结果表明,在地应力小于1 MPa时,地应力对瓦斯突出具有阻碍作用;当地应力大于1 MPa时,地应力对瓦斯突出具有双重作用:一方面其产生的水平压应力增强了煤体抵抗破坏的能力;另一方面其产生的剪切应力促进煤体发生破坏.同时应用研究结果对浅埋煤层瓦斯突出问题进行了分析,认为浅埋煤层承受的地应力较小,煤层中存在着水平拉应力和垂直拉应力且是大范围存在的,故导致浅埋煤层发生瓦斯突出且...

关键词: 气固耦合, RFPA2D-GasFlow, 煤与瓦斯突出, 地应力, 数值试验

Abstract: According to the rock failure damage theories and gas-solid coupling method, the RFPA2D-GasFlow soft code in combination with the stress distribution in coal body and process and the result of gas outburst was applied to the analysis of the effect of ground stress on gas outburst process. The results showed that the ground stress will obstruct the gas outburst if it is lower than 1 MPa. However, when it is higher than 1 MPa, the horizontal compression stress will enhance the resistance to the failure of coal body and, additionally, the shear stress will stimulate the failure of coal body. Then, the results were used to analyze the gas outburst in shallowly buried coal bed. It was found that the ground stress acted on the shallowly buried coal bed is relatively small, and the horizontal and vertical tensile stresses in coal bed are both of great extension-these are just the reasons why the gas outburst occurs in such coal bed and why the gas outbursts thus evoked are mainly of extra-serious type.

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