摘要
为探究重复采动条件下断层滑移特征及其与冲击地压的关系,以老虎台矿83003综放工作面为研究对象,采用数值计算、现场监测和理论分析多种方法进行研究。采用UDEC数值模拟软件和预应力锚索的工作阻力监测,对重复采动条件下断层运动特征以及断层运动与冲击地压或矿震关系进行分析。研究表明,重复采动使断层活化,83003综放工作面开采后F25断层上盘的滑移量达到5~8m;锚索工作阻力突变值大于5kN时,将在33h内发生能量较大(大于10^6J)的矿震,对冲击地压的发生具有预警作用。覆岩破坏、断层滑移、断层应力场和采动应力场耦合作用是83003综放工作面冲击地压频繁发生的根源。
For the sake of exploring the relationship between fault slip and rockburst under the condition of multi-mining, the fully mechanized caving panel 83003 in Laohutai coal mine was taken as an object of study, and numerical calculations, field monitoring activities and theoretical analyses were carried out. The fault motion characteristic in multi-mining and the relationship between fault motion and rockburst or mine earthquake were studied by UDEC numerical softare and monitoring cable working resistance. The results show that multi-mining makes fault active, and the slippage of upper fault F25 reached 5 m to 8 m after mining panel 83003,that when the working resistance value of anchor cable is more than 5 kN, a large energy mine earthquake (〉10^6 J) will occur in 33 h. ,and that coupling effect of overburden failure, fault slip, fault stress field and mining stress field is the root cause of frequent occurrence of rockburst in panel 83003.
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2016年第12期104-109,共6页
China Safety Science Journal
基金
国家自然科学基金资助(51274117
51674135)
关键词
特厚煤层
冲击地压
重复采动
断层滑移
锚索监测
extra-thick coal seam
rockburst
multi- mining
fault slip
anchor cable monitoring