1) Footwall bonchless
下盘无台阶
2) step convergence
台阶下沉
1.
Using the initial post-buckling theory and the cusp catastrophic model,the bifurcation buckling mechanism and unstability of roof strata were studied to derive the formulae of the main roof breaking convergence during the first weighting,to build the criterion of step convergence after the main roof breaking and to determine the final step convergence value.
应用初始后屈曲理论和尖点突变模型探讨了顶板岩层分岔失稳的机理及其屈曲后的不稳定性,得出了采场老顶初次来压时断裂下沉的计算公式,建立了顶板破断后台阶下沉的判据,给出了台阶下沉量。
3) ascending and descending the stairs
上下台阶
1.
Energy consumption in different patterns of ascending and descending the stairs;
不同上下台阶方式的能量消耗分析
5) bench cut method
上下台阶法
6) lowest step
最下阶台板
补充资料：询盘与还盘
询盘：指买方或卖方为洽商交易向对方提出有关交易条件。
还盘：指受盘人对发盘内容不同意或不完全同意而提出修改或变更的表示。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条