矿柱重叠率对采空区稳定性影响分析研究

房柱法多层重叠开采的石膏矿,矿柱的重叠率是影响采空区稳定性的主要因素之一。介绍了房柱法开采重叠采空区的重叠方式、载荷传递规律及稳定性分析方法,并以某石膏矿采空区大面积坍塌事故为例,对事故原因进行了计算分析。重叠采空区稳定性研究结果表明,隔层顶板厚度越小,所要求的上下分层矿柱重叠率就越大;对于隔层顶板厚度较小的重叠采空区,如何保证矿柱的高重叠率是维持重叠采空区稳定的关键因素。

Study on the Influence of Pillar Overlapping Ratio to the Stability of Mined-out area

The overlapping ratio of pillars is one of the important factors to influence the stability of multi-layer mined-out areas in the gypsum mines that apply room-and-pillar mining to excavate ore by multi-layers.This paper introduced the overlapping forms of mined-out areas,load-transmitting law and the methods of stability analysis.Taking a large area collapse of mined-out area in some gypsum mine for an example,the cause of the accident was analyzed.The stability analysis of overlapped mined-out areas showed...