急倾斜矿体持续开采对空区上覆岩层的影响

开采扰动下采空区上覆岩层将产生位移和应力的重新分布。为研究云南某急倾斜铁矿在持续开采下空区上覆岩层移动和破坏情况,根据实验室试验得到的矿山岩体力学参数,建立了矿山有限元模型。对矿体的开采进行了模拟,得到该矿体逐层开挖后上覆岩层最大主应力和地表下沉值的分布图,综合分析急倾斜矿体持续开挖对采空区上覆岩层产生的影响。

The Effect of Continuous Excavation of Mined-out Area Overlying Strata of Inclined Orebody

Mining disturbance will cause the redistribution of displacement and stress of depressing zones overlying a goaf. In order to study the mining goaf overlying strata movement and failure during the continuous mining of a inclined orebody of Yunnan, the finite element model of the iron mine were created according to the mining rock mechanics parameters obtained from the test laboratory. The distribution of maximum principal stress overlying strata and surface subsidence were obtained after layer by layer excavation of the orebody. Then comprehensive analysis of the continuous excavation effect of overlying strata of mined-out area.