摘要
根据现场地质条件,运用FLAC3D数值模拟,对近距离煤层采空区下巷道稳定性进行了分析,并提出相应的支护措施。结果表明:锚索虽可在巷道支护初期提供较高的支护强度和支护刚度,但其延伸率低,在巷道大变形的条件下容易发生破断;接长锚杆具有与巷道协调变形的变形能力,能够很好地适应近距离煤层采空区下巷道围岩破碎、变形量大的特征,为巷道提供长时间的支护。
According to field geological conditions the numerical simulation of FLAC3 Dis used to research stability of mining under roadway the close distance gobs, and some supporting measures are mentioned. The results show that anchor cables can provide high strength and inflexibility in preliminary supporting stage, however, because of low elongation, anchor cables are apt to be broken under the circumstances of large deformation roadway. Lengthened bolts have deformability according with roadway deformation and can adapt to surrounding rock features of mining roadway under the close distance gobs, which deformation is large and surrounding rock is broken. So lengthened bolts can provide long supporting ability to roadway.
出处
《煤炭技术》
CAS
北大核心
2015年第10期52-54,共3页
Coal Technology
关键词
近距离煤层
采空区
巷道支护
close distance coal seams
gobs
roadway supporting
