强开采条件巷道变形破坏与能量转移分析

为进一步研究强开采条件下巷道变形破坏与能量转移特征,采用了RFPA计算软件,对巷道变形破坏及能量传递特征进行分析,研究开采过程中巷道变形破坏规律。研究结果表明,巷道顶部及两端应力集中现象较严重,且随着开采的不断推进,应力值不断增加,在顶部中间部位和两端处易产生裂缝并不断发育,甚至发生局部破坏;从能量释放角度分析可知,随着开挖的推进,能量积聚发生在裂缝发生和扩展区域,也是应力集中部位,当岩体内能量达到材料破坏强度时,材料将发生破坏,表现为拉应力作用下的破坏。数值计算结果可为开采中巷道安全和稳定提供可靠依据。

Study on roadway deformation and destruction and energy transfer under the condition of intensified mining

For further study on the roadway deformation and destruction and energy transfer characteristics of mining projects under the condition of intensified mining,the law of roadway deformation and destruction and energy transfer characteristics is studied by RFPA.The results show that there is a serious phenomenon of stress concentration at the top and two sides of roadway,where the stress increases with the development of mining,and therefore the cracks constantly develop,which even leads to local damage.Energy is accumulated in the area where cracks occur and extend with the development of mining.The roadway will destruct due to tensile stress when the rock energy reaches the destruct limit.The calculated results provide reliable basis for roadway security and stability in mining.