矿业安全与环保
礦業安全與環保
광업안전여배보
MINING SAFETY & ENVIRONMENTAL PROTECTION
2014年
3期
118-120
,共3页
冲击地压%综放工作面%断层%应力
遲擊地壓%綜放工作麵%斷層%應力
충격지압%종방공작면%단층%응력
rock burst%fully mechanized caving face%fault%stress
跃进煤矿F16断层的存在直接影响到25110综放工作面周围岩体应力分布状态及应力集中方式,使煤岩体的构造应力尤其是水平应力增加,易于形成应力集中。通过对工作面顶板岩性结构特征、煤层冲击倾向性以及回采工作面顶板应力分布情况的理论分析及数值模拟研究,表明在F16断层的影响下,煤层受到构造应力、回采工程扰动以及老顶巨厚岩层断裂震动的作用,极易发生冲击地压。
躍進煤礦F16斷層的存在直接影響到25110綜放工作麵週圍巖體應力分佈狀態及應力集中方式,使煤巖體的構造應力尤其是水平應力增加,易于形成應力集中。通過對工作麵頂闆巖性結構特徵、煤層遲擊傾嚮性以及迴採工作麵頂闆應力分佈情況的理論分析及數值模擬研究,錶明在F16斷層的影響下,煤層受到構造應力、迴採工程擾動以及老頂巨厚巖層斷裂震動的作用,極易髮生遲擊地壓。
약진매광F16단층적존재직접영향도25110종방공작면주위암체응력분포상태급응력집중방식,사매암체적구조응력우기시수평응력증가,역우형성응력집중。통과대공작면정판암성결구특정、매층충격경향성이급회채공작면정판응력분포정황적이론분석급수치모의연구,표명재F16단층적영향하,매층수도구조응력、회채공정우동이급로정거후암층단렬진동적작용,겁역발생충격지압。
The existence of F16 fault in Yuejin Coal Mine directly affects the stress distribution state and stress concentration mode of the rock mass around 25110 fully mechanized caving face, which will cause the increase of the tectonic stress of rock mass, especially the increase of horizontal stress, and easily form stress concentration. The theoretical analysis and numerical simulation study on the structural characteristics of roof rock, the potential burst of coal seams and the roof stress distribution in the working face showed that the rock burst easily occurred due to the influence of F16 fault and under the action of tectonic stress, the mining disturbance and the rupture of the extra-thick main roof.