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倾斜缓倾斜中厚矿体,在我国化工矿山占磷矿总储量的70％以上,在建材矿山的石膏矿床中约占35％,在冶金矿山的铁矿床中约占18％。对于这类矿床,地下开采是一比较薄弱环节,其原因主要在于受矿体倾角与厚度的制约,用空场法开采时的采场运搬和顶板管理均很困难,用分段崩落法开采时的放矿损失贫化问题较突出,应用底盘漏斗法开采的采准切割量甚大,加上矿石价值大多不高,又限制了充填法的选择应用,故在有关矿山总的存在问题较多。 根据国内这类矿床的开采实践,立足于合理开发资源,提高经济效益,笔者认为应研究解决以下主要问题:
Slightly inclined inclined moderate thick ore body accounts for over 70% of the total phosphate rock reserves in China’s chemical mines, 35% in gypsum deposits in building materials mines and 18% in iron ore deposits in metallurgical mines. For such deposits, underground mining is a relatively weak link, mainly due to the constraints of ore body inclination and thickness. It is very difficult to carry the stope and roof management when using the open field method and is exploited by the caving method When the loss of ore depletion problem is more prominent, the application of chassis funnel mining mining cut is very large, with most of the ore value is not high, but also limited the choice of filling method, it is more in the mine total problems . According to the domestic mining practice of such deposits, based on the rational development of resources and improve economic efficiency, I believe that the following major issues should be studied and solved: