中国安全科学学报 ›› 2019, Vol. 29 ›› Issue (11): 171-176.doi: 10.16265/j.cnki.issn1003-3033.2019.11.027

• 安全工程技术科学 • 上一篇    下一篇

覆岩关键层水力压裂控制采动影响研究

冯占杰1, 郭文兵1,2 教授   

  1. 1 河南理工大学 能源科学与工程学院,河南 焦作 454000;
    2 煤炭安全生产河南省协同创新中心,河南 焦作 454000
  • 收稿日期:2019-08-22 修回日期:2019-10-19 发布日期:2020-10-30
  • 作者简介:冯占杰 (1994—),男,河南延津人,硕士研究生,研究方向为矿山压力与岩层控制。E-mail:211702010011@home.hpu.edu.cn。
  • 基金资助:
    国家自然科学基金资助(51774111)。

Study on control of mining influence by hydraulic fracturing in key strata

FENG Zhanjie1, GUO Wenbing1,2   

  1. 1 School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo Henan 454000, China;
    2 Synergism Innovative Center of Coal Safety Production in Henan Province, Jiaozuo Henan 454000, China
  • Received:2019-08-22 Revised:2019-10-19 Published:2020-10-30

摘要: 为减小煤炭井工开采对地表建(构)筑物的影响和破坏,以晋煤寺河矿5304工作面为研究对象,运用理论分析和数值模拟相结合的方法,分析覆岩关键层水力压裂控制工作面采动受影响范围,研究覆岩关键层水力压裂前后覆岩垮断形态及地表沉陷特征,揭示覆岩关键层对地表沉陷控制机制。结果表明:覆岩关键层水力压裂后,其移动形式由弯曲下沉转化为沿压裂区滑移切落,水力压裂区域地表下沉曲线变陡,下沉值增大,压裂侧地表采动影响范围减小。

关键词: 关键层移动模式, 地表沉陷控制, 采动影响, 水力压裂, 数值模拟

Abstract: In order to reduce impact and damage of coal mining on surface structures, with 5304 working face of Sihe Coal Mine, Jincheng Coal Mining as a research object, theoretical analysis and numerical simulation were conducted to analyze control of working face's mining influence by hydraulic fracturing in key strata. Then collapse mode of overburden and surface subsidence laws of key strata before and after hydraulic fracturing were studied, and its control mechanism on surface subsidence was revealed. The results show that after hydraulic fracturing, the movement mode is transformed from bending subsidence to sliding shear drop along fracturing zone. As surface subsidence curve in the hydraulic fracturing zone becomes steep, subsidence value will increase while influence scope of surface mining on fracturing side decreases.

Key words: key strata movement mode, surface subsidence control, mining influence, hydraulic fracturing, numerical simulation

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