This paper introduces the successful experience of over roadway extraction in complex geology that has roof step,face roof collapse with cavity,passing through fault etc.
介绍了135采煤队在顶板台阶下沉、漏顶、压力大、过断层等复杂地质因素影响下,跨巷道高档普采成功回采的经验。
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。
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
She has trouble navigating the stair.
她上下台阶有困难。
Analysis of longitudinal deformation profile in city-gate shaped tunnel using top heading and bench excavation method
上下台阶开挖下城门形隧洞纵向变形规律分析
He fell down the steps and barked his shins.
他从台阶上跌下来，擦破了小腿上的皮。
She couldn't find him from the top of the steps, and he wasn't on the veranda.
她从台阶上头向下看，找不到他，他也不在阳台上。
He was sitting on the bottom step.
他坐在最下面的一级台阶上。
What if you fall down the steps?
你要在台阶上摔下来怎么办？
I fell down the steps and barked my shins.
我从台阶上跌下，伤了我的胫。
Murray descended the steps into the swimming pool.
默里从台阶上下到游泳池里。
tumble down the stairs, off a bicycle, out of a tree, over a step, etc
从楼梯上滚下、 从自行车上摔下、 从树上掉下、 绊倒在台阶上
He cascaded down a flight of steps and spilled into the street
他从一连串的台阶上跌下摔到大街上去了。
This conversation had passed as they stood upon the terrace, from which a flight of stone steps led to the carriage-drive.
这一番谈话是站在台阶上说的，从台阶上跨下几级石阶便是马车的跑道。
Mother's hands shook as she came up the steps, dumped her apron and reached for her hoe.
母亲走上台阶，摔下围裙，抓起锄头，两手发抖。
He alighted and went up the steps to the front door, but it was with a nervous palpitation of the heart.
他下了车，上了台阶，走到前门，紧张得心砰砰乱跳。
To Strengthen Belun s Industrial Economy for a New Stage;
新形势下北仑工业经济再上新台阶试探
We walked up its front steps and stopped at a small information stand.
我们沿着它前面的台阶向上走，在一处小小的咨询台前停了下来。
But the steps became deeper and deeper, and at last I had to drop down the steps the length of my body arid more.
不过台阶越来越高，后来我得从跟我一样高、甚至比我还高的台阶上爬下去。
The Yellow River flows across three topographies and there are many falls more than1,000 meters of height between each of them.
从黄河的源头顺流而下，会经历三大地理台阶，而每一级台阶之间都有上千万米的落差。
He went down the steps with her at his back.
他同身后的她走下台阶。