大采高工作面顶板破断与失稳形式研究

Study on Roof Breaking and Instability Types of Working Face with Large Mining Height

摘要: 利用弹性力学理论，将大采高工作面顶板简化为梁结构，分析基本顶初次破断和周期破断后岩块的失稳形式，研究影响顶板结构稳定性的主要因素，指出了结构产生滑落失稳和回转失稳的条件，阐述了大采高工作面顶板结构的失稳形式。结果表明，基本顶破断后岩块的高长比对结构的稳定性起关键作用，保证了大采高工作面的安全生产。
- 大采高工作面 /
- 顶板破断 /
- 岩块结构 /
- 失稳形式
Abstract: The elastic mechanics theory is used to simplify roof in large working face into beam structure, and the paper analyzes instability types of rock after main roof first breaking and periodic breaking, studies the main factors influencing the stability of the roof structure, points out the conditions of sliding instability caused by structure and the rotary instability, and expounds the instability types of roof strcture at large mining height working face.The results show that the ratio of height and length of rock block after old roof breaking plays a key role in the stability of structure, which ensures the safety production of working face with large mining height.
- large mining height working face /
- roof fracture /
- rock structure /
- instability type

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