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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 mining safety and reduce the mining cost of bedrock deposits under the seawater cover, it is very important to determine the thickness parameters of the safe mining of bedrock under water pressure reasonably.Based on the analysis of roof geological structure and mining conditions, Engineering analogy method and mechanics analysis method to estimate the safety thickness of the roof, and then establish the finite element model of stope structure to quantitatively calculate the minimum safety thickness of the roof.The research shows that the engineering analogy and analytic method can initially determine the safety thickness range The numerical simulation method can consider multiple influencing factors and provide the basis for selecting and optimizing the stope parameters reasonably and helping to formulate and test the safe mining plan.The combination of engineering analogy method, mechanics analytic method and numerical simulation method can effectively determine the influence of seawater pressure Bedding mining safety roof thickness parameter.