In large dip Angle mining face, the antis-kid and anti-collapse question on hydraulic support is a key to mining successfully.
在大倾角工作面中，液压支架的防倒防滑问题是工作面能否顺利实现开采的关键。
The annular swirling jet with large dip Angle is studied and its Central Line equation is derived from fluid mechanics theory and experimental analysis.
对倾斜环形旋转射流中心线进行了理论与试验研究，得出了倾斜环形旋转射流中心线方程。
There are series problems exist in the existing thick seam mining technology with large dip Angle, thus cause low extraction rate, poor safety and high cost.
现有的大倾角厚煤层开采技术存在着一系列问题，从而导致煤矿回采率低，安全性差，成本高。
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