periodic weighting

常见例句

Cantilever beam of key strata breaks and caves into blocks, which is periodic weighting of mining face.
关键层悬臂梁破断垮落成承压砌块，其垮落及沿架后切落，形成工作面周期来压。
The fracture of overlying key stratum results in decrease of the roof caving angle and the increase of periodic caving span and weighting intensity.
覆岩关键层的破断使工作面顶板垮落角减小、周期垮落步距和来压强度都增大。
Periodic weighting was analysed by the bearing wedge model, simultaneity, the mechanics of first weighting and periodic weighting were expounded.
利用承压砌块模型分析了周期来压过程，并给出了初次来压和周期来压机理。