东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2011, Vol. 32 ›› Issue (10): 1480-1483.DOI: -

• 论著 • 上一篇    下一篇

穿煤层钻孔定向水压致裂的数值仿真

富向;刘洪磊;杨天鸿;杨宏伟;   

  1. 东北大学资源与土木工程学院;煤炭科学研究总院沈阳研究院;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家重点基础研究发展计划项目(2010CB735508);;

Simulating directional hydraulic fracturing through coal seam drilling hole

Fu, Xiang (1); Liu, Hong-Lei (1); Yang, Tian-Hong (1); Yang, Hong-Wei (2)   

  1. (1) School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China; (2) Shenyang Institute, China Coal Research Institute, Shenyang 113001, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Liu, H.-L.
  • About author:-
  • Supported by:
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摘要： 选取鸡西城山煤矿现场实例,利用RFPA2D-Flow软件模拟了穿煤层钻孔定向水压致裂全过程.分析了应力、水压的分布与变化规律,研究了损伤区域、卸压区域的形成与扩展过程.对穿煤层钻孔定向水压致裂前后煤层瓦斯抽放过程中瓦斯抽放效果及压力分布进行了对比研究.结果表明,实施定向水压致裂后压裂孔与控制孔之间的卸压区成为主要的瓦斯渗流通道,使瓦斯抽放效果显著提高.

关键词: 穿煤层钻孔, 水压致裂, 数值模拟, 瓦斯抽放

Abstract: Selecting on-site case of Jixi Chengshan coal mine as an engineering example, RFPA2D-Flow software was used to simulate the entire process of the directional hydraulic fracturing through coal seam drilling hole. The distribution and change of stress and water pressure were analyzed, with the formation and expansion of the damage and pressure relief zones studied. The gas drainage effect and gas pressure distribution during the gas drainage were contrastively studied before/after directional hydraulic fracturing through coal seam drilling hole. The results showed that the pressure relief zone between fracturing hole and controlling hole is the main channel for gas seepage after implementing directional hydraulic fracturing, thus the gas drainage effect is improved significantly.

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