Through the site observation, the simulation and the numerical value computation, obtained the gateway plastic area in high-pitched and critical Angleseam.
通过现场实测、相似模拟和数值计算得出了大倾角临界角煤层回采巷道塑性区的分布情况。
2
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。
3
In experiments, brazing parameters and laser incident Angle were changed during the process. The regularity of appearance of brazing seam in different heat input was obtained.