With regard to how ameliorate the strength of back-filling materials of tailing-cementation, some Suggestions are summarized in this paper.

针对尾砂水泥胶结充填体强度如何提高的问题，总结了湖北鸡笼山金矿几点经验与建议。

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The back filling at the slope bottom not only enhances slope stability, but also provides the safe overlay which is needed in underground mining.

回填体不仅提高了边坡的稳定性，还为转入地下开采提供了所需的安全覆盖层厚度。

youdao

Jiaojia's new type of cemented tailing material is a kind of good quality material for tailings back filling.

焦家新型尾砂胶结材料是一种性质优良的新型尾砂充填胶结材料。

youdao

We might need to get some of that back-filling type action in order to get investors excited about buying again.

FORBES: Big Earnings Coming From Google, Apple, IBM, ISRG

The idea is to lure back business travellers by having more frequent, point-to-point flights, rather than filling huge jumbos with lots of back-packers.

ECONOMIST: Ayling��s failings

The home side continued to press after the interval, and David Bentley was introduced after 54 minutes as replacement for Chris Gunter, although it was mystifying to see him filling a right-back role.

BBC: Tottenham 0-1 Hull