摘要
三山岛新立矿区属于海底矿床开采,设计生产能力达到6000t/d,大量、快速、高强度海底采矿与井下大量爆破势必引起海床变形与沉降、潜藏海水大量涌入井下的巨大安全风险。根据新立矿区开采技术条件,分析其不同原岩应力场下的次生应力场及岩移特征,研究结果表明,水平构造应力场对开采引起的地表沉陷有明显的抑制作用,但会引发更大的水平位移,建议至少预留65m保安矿柱,以确保矿区安全生产。
Xinli mining area of Sanshandao gold mine is a submarine gold deposit,its designed productive capacity is 6000d/t.The bulk,rapid,high-intense undersea mining and underground blasting is bound to cause seabed deformation and settlement,there is potential safety hazard of bulk influx of seawater in underground mine.Based on the mining conditions of Xinli mining area,the characteristics of rock movement and the secondary stress field under different in-situ rock stress field is analyzed.The study showed that the horizontal tectonic stress field can significantly inhibit the surface subsidence caused by mining,but can cause a great horizontal displacement.It was suggested that safety pillar of 65 m should be reserved at least so to ensure safety in production at the mining area.
出处
《矿业研究与开发》
CAS
北大核心
2010年第5期70-72,76,共4页
Mining Research and Development
基金
国家重点基础研究发展计划(973)项目(2007CB209402)
国家自然科学基金
上海宝钢集团公司联合资助项目(51074177
关键词
海底矿床开采
岩移特征
数值模拟
次生应力场
Undersea mining
Characteristics of rock movement
Numerical simulation
Secondary stress field
