摘要
马城铁矿上覆厚大第四系强含水体,属大水矿床,采场顶板稳定将是矿床开采的关键。本文采用FLAC3D对马城铁矿上向分层充填法方案的不同间距的点柱和不同厚度的顶板稳定性进行研究。研究表明,Ⅲ号薄矿体顶板比Ⅱ号厚大矿体顶板稳定好,Ⅲ号薄矿体预留厚度宜采用15m,Ⅱ号厚大矿体顶板预留厚度以30m为宜。
The Macheng iron mine overlain by the thick quaternary aquifer belongs to the ore deposit of large quantity of water.Stope roof stability is the key to deposit mining.FLAC3D is used to analyze the roof stability in the situation of both different roof thicknesses and varying dot pole space based on overhand cut-and-fill method.Research results show that the roof of the Ⅲ thin ore body is more stable than that of the II thick ore body,and the roof thickness should be reserved by 15 m for the Ⅲ thin ore body,and 30 m for the Ⅱ thick ore body.
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2013年第2期79-82,共4页
Hydrogeology & Engineering Geology
