摘要
为了保证海水覆盖下基岩矿床的开采安全和降低开采成本,合理确定水压作用下海底基岩安全开采项板厚度参数显得至关重要.本文在分析顶板地质结构和开采条件的基础上,采用工程类比法和力学解析法初步估算顶板稳定时的安全厚度,然后建立采场结构的有限元模型,定量计算顶板的最小安全厚度.研究表明,工程类比法和解析法可初步确定顶板安全厚度范围;数值模拟方法可以考虑多重影响因素,为合理选择和优化采场参数提供依据,帮助制订并检验安全开采方案.工程类比法、力学解析法和数值模拟方法的有机结合能有效地确定海水压力下基岩矿床安全开采顶板厚度参数.
In order to ensure the safety production and reduce the mining cost of deposit in seabed rock, it is essential to determine the safety thickness of mining roof in seabed rock under seawater pressure. On the basis of the analysis of roof geological structure and mining conditions, the thickness of stable roof is initially estimated through engineering analogy method and mechanical analytical method. Then the finite element model of stope structure is established to quantitatively calculate the safety thickness of roof. The studies show that the range of the roof thickness can be initially estimated through the engineering analogy method and the analytical method with assumptions. And the numerical simulation can easily consider the impact of multiple factors, thus provide a basis for the reasonable determination and optimization of stope parameters. Furthermore, it can help to develop and verify the safety of mining method. The integration of engineering analogy method, mechanical analytical method and numerical simulation is effective in determining the safe mining roof thickness in seabed rock under seawater pressure.
出处
《采矿与安全工程学报》
EI
北大核心
2010年第3期335-340,共6页
Journal of Mining & Safety Engineering
基金
国家重点基础研究发展计划(973)项目(2007CB209400)
国家重点实验室开放基金项目(SKLGDUEK0906)
关键词
海底采矿
海水压力
顶板厚度
工程类比法
力学解析法
数值模拟
undersea mining
seawater pressure
mining roof thickness
engineering analogy method
mechanical analytical method
numerical simulation
