煤炭工程 ›› 2022, Vol. 54 ›› Issue (12): 109-114.doi: 10.11799/ce202212020

• 研究探讨 • 上一篇    下一篇

基于倾角效应的大采高采场顶板变形破坏规律研究

郭永红,黄宝发,解盘石,陈建杰   

  1. 1. 国能蒙西煤化工股份有限公司
    2. 西安科技大学能源学院
  • 收稿日期:2022-09-29 修回日期:2022-10-24 出版日期:2022-12-14 发布日期:2023-02-06
  • 通讯作者: 黄宝发 E-mail:3251403264@qq.com

Deformation and failure characteristics of roof in large mining height based on dip angle effect

  • Received:2022-09-29 Revised:2022-10-24 Online:2022-12-14 Published:2023-02-06

摘要: 为探究倾角效应下大采高采场顶板的变形破坏特征,在对顶板变形破坏、滑移充填特征综合分析的基础上,研究了不同倾角条件下大采高工作面顶板垮落运移充填规律。研究表明:受工作面倾角影响,围岩的变形破坏与充填形态呈现出明显的非对称特性,随工作面倾角增大,矸石支撑区域长度增加,充填矸石对顶板沿倾向和走向的非均衡约束效应增强,采场顶板受载与变形破坏特征及其破坏后所形成的堆砌-铰接结构的区域性特征愈发明显,中上部区域顶板破坏程度加大,易发生滑落、变形失稳,形成冲击来压,导致倾向不同区域支架非均衡受载的程度与失稳概率显著增大,“支架-围岩”系统稳定性大幅度降低,极易诱发工作面围岩灾变现象。

关键词: 大采高, 滑移充填, 倾角效应, “支架-围岩”关系, 顶板稳定性控制

Abstract: In order to explore the deformation failure characteristics of large mining height stope roof under the effect of dip angle, based on the comprehensive analysis of roof deformation and sliding filling characteristics, this paper studies the roof caving and migration filling law of large-mining-height working face under different dip angles. The results show that due to the influence of the dip angle of the working face, the deformation and failure of the surrounding rock and the filling form show obvious asymmetric characteristics. With the increase of the dip angle of the working face, the length of the gangue support area increases, and the unbalanced constraint effect of the filling gangue on the roof along the dip and strike is enhanced. The regional characteristics of the loading and deformation failure characteristics of the stope roof and the pile-hinge structure formed after the failure are more obvious. The damage degree of the roof in the middle and upper parts is increased, and it is easy to slip and deform and lose stability, forming impact pressure, resulting in a significant increase in the unbalanced loading degree and instability probability of the support in different areas. The stability of the ' support-surrounding rock ' system is greatly reduced, which is easy to induce the disaster of surrounding rock in the working face.

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