中国安全科学学报 ›› 2024, Vol. 34 ›› Issue (S1): 115-121.doi: 10.16265/j.cnki.issn1003-3033.2024.S1.0008

• 安全工程技术 • 上一篇    下一篇

不同采动孤岛工作面覆岩结构研究与防冲应用

董华东()   

  1. 国能锦界能源有限责任公司, 陕西 榆林 719000
  • 收稿日期:2024-02-05 修回日期:2024-05-11 出版日期:2024-12-02
  • 作者简介:

    董华东 (1988—),男,山西忻州人,硕士,高级工程师,主要从事矿山压力与矿井开采技术方面的研究。E-mail:

Structure of overlying strata on isolated island working faces with different mining degrees and anti-impact application

DONG Huadong()   

  1. Jinjie Energy Group of China Energy Investment Corporation, Yulin Shaanxi 719000, China
  • Received:2024-02-05 Revised:2024-05-11 Published:2024-12-02

摘要:

为保证有冲击地压孤岛工作面的安全开采,以某矿巨厚坚硬岩层条件下孤岛工作面开采为背景,基于岩层控制的关键层理论和覆岩空间结构观点,通过案例调研、理论分析、现场监测等方法,研究孤岛工作面形成覆岩空间结构的基本特征、监测辨识方法及其防冲开采设计,辨识得到Γ型覆岩空间结构的形成过程和分布特征,建立以支承应力为主要评估指标的Γ型覆岩空间结构下孤岛工作面合理宽度力学模型,并以实践验证。结果表明:一侧充分采动、一侧非充分采动条件下的孤岛工作面,能够与上覆巨厚关键层形成Γ型覆岩空间结构。所提实施方案满足现场工程要求,能够保证正常回采。

关键词: 孤岛工作面, 巨厚关键层, 岩层运动, 冲击地压, Γ型覆岩空间结构

Abstract:

In order to ensure the safe mining of isolated island working face with impact ground pressure, the isolated island working face mining under the condition of a thick and hard rock layer in a mine was taken as the background. Based on the key layer theory of rock layer control and the viewpoint of the spatial structure of overlying strata, the basic characteristics of the spatial structure of overlying strata formed in the isolated island working face were studied through case study, theoretical analysis, and on-site monitoring, as well as the monitoring and identification method and its anti-impact mining design. The formation process and distribution characteristics of the spatial structure of Γ-type overlying strata were identified, and a mechanical model of reasonable width of the isolated island working face under the spatial structure of Γ-type overlying strata and with the abutment pressure as the main assessment index was established and applied for verification. The results show that the isolated island working face under the condition of one side being fully mined and the other side not being fully mined can form a spatial structure of Γ-type overlying strata with the overlying thick key layer, and the implementation scheme proposed in the paper meets the requirements of the field engineering and can ensure normal mining.

Key words: isolated island working face, thick key layer, strata movement, impact ground pressure, spatial structure of Γ-type overlying strata

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