To maximize economic benefits on the premise of exploiting in safety, based on the project situation and condition of rock mechanics, the finite element numerical simulation with different stope structure parameters was established. The optimized objective function was established in which strain energy of stress restriction system is maximized, matlab programme was applied to seek response surface function, and then response surface function was optimized by nonlinearity technology. The results show that the sequentially gained pointed prop's sizes are as follows: bx=4 m; bz=4 m; lx=12 m; lz=12 m; h=25 m. The method is scientific, and provides the technical support for Xinli area of Sanshandao Gold Mine's safety and efficient exploitation in under-sea mining.%为了在安全开采的前提下实现经济效益最大化,从矿山开采工程状况及岩石力学条件出发,建立不同框架式采场结构参数的有限元数值计算模型.通过有限元计算结果建立应力约束的体系应变能最大化的目标函数,应用Matlab编程求响应面函数,最后采用非线性优化技术对响应面函数进行优化.计算结果表明:垂直矿体走向方向的截面尺寸bx=4 m;沿矿体走向的截面尺寸b2=4m;垂直矿体走向方向的跨度lx=12 m;沿矿体走向的跨度lz=12m；矿柱高度h=25 m;该方法科学合理,为三山岛金矿新立矿区海下安全经济开采矿石资源提供了技术保障.
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