spontaneous caving

The failure,rupture and collapse of mining induced surrounding strata are a representative process in which the boundaries of dynamic system are variable.

煤矿采动围岩的破坏、断裂和垮落是具有代表性的时变边界过程。

Production Practice of changing forced caving into natural caving;

强制崩落法转为自然崩落法生产实践

The natural caving optimization study carried out in Yechangping molybdemum mine,Henan Province using three-dimensional elastic-plastic finite element method and three-dimensional stress analysis of geotechnical engineering-specific software(3D-σ) to simulated calculate pillar size.

进行的河南省卢氏县夜长坪钼矿自然崩落法开采优化研究,采用三维弹塑性有限单元法,运用岩土工程专用三维应力分析软件(3D-σ)对夜长坪钼矿自然崩落法的矿柱宽度尺寸优化模拟计算。

Prediction for block caving velocity of ore-rock is a complex dynamic process that relates to the caving rule and to the relation between caving and time.

矿岩自然崩落速率预测是一个涉及崩落规律和崩落与时间相依关系的复杂动态过程,通过数值模拟的方法,对流变断裂型矿岩的自然崩落规律和崩落速率进行了模拟研究。

In mining method of block caving,undercut is the most feasible and active man-made factor used to control the caving process.

拉底是自然崩落法最灵活,最具有主动性的人为控制崩落的因素,它通过直接或间接地改善岩体的可崩性,达到诱导持续崩落和降低矿岩大块率的目的。

Roof breaking law along top-coal caving face

综放开采沿工作面倾向顶板垮落规律

The Theoretical Study on Cyclone Disaster Caused by Stope Roof Falling over Great Extent;

采场顶板大面积垮落的飓风灾害的理论研究

The ConstructionAnalysis of Anti-Well Method Through Falling Soft Rock Section

反井法施工立井井筒过软岩垮落段实践分析

Modeling Experiment for the Rock Movement During Grouting Backfill in Caving Area with Strip Mining

条带间垮落区注浆充填覆岩移动规律研究

Main roof first collapse law and measure of controlling roof in seam with approximate shallow depth

近浅埋煤层老顶初次垮落规律及控顶措施

Application of short wall fully caving coal mining method in Shendong coal mine area

短壁全部垮落采煤法在神东矿区的应用

Numerical model of nonlinear flow-diffusion for gas mitigation in goaf and atmosphere

采空垮落区瓦斯非线性渗流-扩散模型及其求解

Research on Air Bumping Disaster Induced by Large Roof Falling in Goaf

采空区顶板大面积垮落的空气冲击灾害研究

Research On Mining Technology of No-pillar Complete Caving Shortwall Mechanization

无煤柱完全垮落短壁机械化开采技术研究

DETERMINING THE HEIGHT OF COLLAPSE AND FRACTURE ZONE WATER-TRANSMITTING IN MINED-OUT AREA BY MEANS OF BOREHOLE

利用钻孔确定采空区垮落带和导水裂隙带高度

Haines from the corner where he was knotting easily a scarf about the loose collar of his tennis shirt spoke:

海恩斯在角落里正松垮垮地往他的网球衫那宽松领口系领巾，他说：

All beat her-because of her backwardness, because of her military backwardness, cultural backwardness, political backwardness, industrial backwardness, agricultural back wardness.

谁都能打垮它--因为它落后，军事落后，文化落后，政治落后，工业落后，农业落后。

Our local pub has gone to the dogs since they put in the snooker tables and video jukeboxes.

我们当地的酒店自从把落袋撞球戏桌子和电视自动电唱机摆进来后就垮了。

A long rail trip and an Atlantic crossing could knot him all up and maybe disable him.

乘火车长途旅行，加上横渡大西洋，可能把他拖垮了，说不定就此落得个残废。

When a railway heist goes wrong, an enormous bag of money falls from the sky into the hands of Damian and Anthony.

一宗搞垮了的火车劫案，令千万金元从天而降，落在迪文与安东尼两兄弟的手中。

The Suez debacle in 1956 was a sudden eye-opener to the decline of British power in the eastern Mediterranean.

1956年苏伊士运河事件上的垮台，突然使世人恍然大悟，看出英国在东地中海的地位衰落了。

Of breaking me down, you mean.

你是说，让我垮掉。

"The Fuehrer has broken down!"

“元首已经垮了!”