建立了渗吸式开采模型，对注水先导性试验进行了研究。
The mathematical model of imbibition production was established. The pilot test of water injection was researched.
因此提出极近距离薄煤层群联合开采常规错距开采模型，并进行理论和物理模拟试验研究。
Therefore, the conventional staggered distance model of ultra-close thin coal seam group during combined mining is put forward; and the theoretical research and physical simulation are carried out.
最后，在此基础上，利用最优化原理，建立了使钒钛磁铁矿中钛回收率达到最佳的矿山开采模型。
At last, based on above, the mine-exploiting model, which might made the recycling of titanium among vanadic titanomagnetite best, was figured out by using of optimum principle.
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