复杂采动条件下不同巷道断面形状围岩稳定性分析

Stability Analysis of Surrounding Rock of Different Roadway Sections and Support Patterns in Mine Roadway under Complex Mining Conditions

依据济三煤矿实际的地质条件及地质资料,采用有限元数值模拟软件FLAC^3D模拟了183下05工作面带式输送机顺槽是矩形断面与等腰梯形断面沿底板掘进,183上07工作面后回采.得到了不同巷道断面掘进的巷道围岩应力应变情况,通过应力及应变数据得出:当183下05工作面带式输送机顺槽掘进未支护时,巷道围岩垂直应力与水平应力规律基本一致,但是梯形巷道水平位移量要小于矩形巷道,梯形巷道垂直位移规律与矩形巷道相反,底鼓量大于顶板下沉量.

to the actual geological conditions and geological data of Jining No.3 coal mine,finite element numerical simulation software FLAC^3D was used to simulate the excavation of the head gate of the 183down05 working face along the floor first with a rectangular form and an isoscelestrapezoidal form and different roadway support patterns,183up07 working face is mined second.The stress and strain of surrounding rock under different sections and support patterns are obtained.according to the data of stress and strain,the vertical stress and horizontal stress law of the surrounding rock of roadway is basically the same when the excavation of the head gate of the 183down05 working face is carried out without support,but the horizontal displacement of trapezoidal roadway is smaller than the vertical displacement of rectangular roadway and trapezoidal roadway in contrast to rectangular tunnels,the amount of bottom drum is greater than the amount of roof subsidence.