【作者】 尹尚先； 武强；

【Author】 Yin Shangxian

【机构】 华南理工大学交通学院； 中国矿业大学北京校区安全与资源学院；

【摘要】 为研究底部背斜构造且奥灰承压水影响下巷道的变形规律及稳定性,对开滦范各庄矿通过南四马鞍型背斜的三水平大巷进行了可视化FLAC^3D数值模拟。结果表明,拱形巷道围岩塑性破坏带呈‘八字型’,背斜对底板应力应变及应力集中均有影响,背斜顶部岩层越靠近巷道底板,影响越大,巷道与背斜轴斜交时,引起底板非对称应力集中及变形;岩石强度是阻抗水压保持底板稳定的关键因素,奥灰水压使巷道顶底板移近量加大,底板弯拉破坏加重;由于本次研究隔水层厚度较大,即使岩体强度较低（折减系数为0.1）,奥灰承压水作用下的巷道仍保持稳定。更多还原

【Abstract】 For studies on displacement rules and stability of arch lane,the arch lane overpassing NanSi anticline in the third mining level,Fangezhuang,Kailuan,is simulated with FLAC^3D.As a result, mold yield zone of rock masses surround arch lane is just like Chinese character‘八’,anticline has effect on stress and strain as well as stress concentration of floor,and the closer upper rock stratum at anticline axis and lane floor is,the larger influence,when laneway crosses anticline axis with angle,nonsymmetry stress concentration and displacement of floor can be conduced;Rock intensity is a key factor of resisting Qrdovician limestone water pressure and keeping steady of coal floor,displacement of roof and coal floor is increased and bend or draw yield of coal floor becomes serious as a result of effect of Karstic water pressure.Because thickness of the protective layers at studying areas is large,even though rock intensity is low（discount coefficient equals to 0.1）,floor still keep steady under Karstic water pressure in confined aquifer.更多还原