用交替法分析卸压巷硐的卸压效果

Using Alternate Method to Analyze Pressure Relief Effect of Pressure Relief Lanes

利用交替法原理及解析数学中的复变函数法,计算在卸压巷硐的作用下,巷道周边的环向应力与径向应力的解析表达式。并针对某实例,通过mathematica数值软件,描绘出了卸压前后,巷道周边环向应力与径向应力的卸压效果:径向压力在巷道边缘0.8 m内卸压效果不明显,但是对深部围岩的卸压效果很好。巷道周边的环向应力的卸压量很大,对高环向应力有很好的卸压作用。因此对于周边环向应力较大的巷道,选择开卸压巷硐卸压的方式能取得较好的效果。

This paper uses alternate method principle and complex variable function method of analytical mathematical to calculate the analytical expression of the hoop stress and radial stress around the roadways under the action of the pressure lane.And in the light of an example,through mathematica numerical software,pressure relief effect of hoop stress and radial stress around the roadway before and after pressure relief is described;the pressure relief effect of radial stress around roadway edge 0.8 m is not obvious,but good on deep surrounding rock.The pressure relief amount of hoop stress around roadway is big,which has good pressure relief affect on high hoop stress.So those roadways with high hoop stress choosing pressure relief lane method can achieve a good result.