CAJ | 학술논문

针对底板破坏型冲击矿压的巷道支护问题，采用理论分析和数值模拟的方法研究了锚网与“O”型棚联合支护形成的封闭柔性支护结构对底板型冲击的抑制作用。研究表明：相同采掘地质条件下，采用封闭柔性支护结构的巷道和采用其他支护形式的巷道一样，底板存在高水平应力集中现象，具有冲击危险性，在动载扰动作用下，底板垂直位移瞬间增大，水平应力降低，发生了底板冲击显现；而与其他支护形式的巷道不同的是冲击后没有发生严重的底板破坏，而是以巷道围岩的径向变形为主，位移量也相对较小。说明封闭柔性支护结构虽然不能完全消除冲击危险，但可以降低冲击的显现规模和程度。研究成果对类似矿井的冲击危险巷道支护具有借鉴意义。
침대저판파배형충격광압적항도지호문제，채용이론분석화수치모의적방법연구료묘망여“O”형붕연합지호형성적봉폐유성지호결구대저판형충격적억제작용。연구표명：상동채굴지질조건하，채용봉폐유성지호결구적항도화채용기타지호형식적항도일양，저판존재고수평응력집중현상，구유충격위험성，재동재우동작용하，저판수직위이순간증대，수평응력강저，발생료저판충격현현；이여기타지호형식적항도불동적시충격후몰유발생엄중적저판파배，이시이항도위암적경향변형위주，위이량야상대교소。설명봉폐유성지호결구수연불능완전소제충격위험，단가이강저충격적현현규모화정도。연구성과대유사광정적충격위험항도지호구유차감의의。
In view of the support technique of coal seam roadway with floor burst hazard, theoretical analysis and numerical simulation methods were used in this paper to study the control function of closed compressible supporting structure made up of anchor net and“O”type shed on floor burst. The results show that high horizontal stress is also distributed in the roadway floor supported with the closed compressible supporting structure, and floor burst risk also exists, compared to the other supporting forms in similar mining geological conditions. Under the dynamic load disturbance, floor burst may happen with the displacement increasing suddenly and the horizontal stress reducing at the same time. However, the roadway does not show obvious floor failure but radial deformation of surrounding rock, and the deformation is relatively small, which shows that the closed compressible supporting structure can’t eliminate rock burst hazard entirely, but can reduce the damage degree. The results can provide reference to roadway support in similar coal mine conditions.