松动圈对采动应力监测的影响研究

Study on the influence of loose circle to mining stress monitoring

运用ABAQUS模拟软件结合室内实验对采动应力监测过程中松动圈的影响进行了研究。结果表明,钻孔松动圈的存在使采动应力监测值相对实际值偏小。松动圈的直径越大,松动圈内煤岩体弹性模量越小,采动应力监测精度越低,且随着采动应力的增加,精度越来越低。

The paper researched the influence of loose circle to mining stress monitoring by using ABAQUS simulation software and la- boratory experiments. The results show that the mining stress monitoring value is smaller than actual value for the presence of loose cir- cle of drilling, the larger the diameter of loose circle, the elastic modulus of coal and rock inside loose circle is smaller and mining pressure monitoring accuracy is lower and the monitoring precision tends to lower with the increase of the mining stress.