wall caving prevention

用法例句

Especially for the definition and analysis of induced fissures created by hydraulic fracturing and borehole wall breakouts,there were many advantages of this equipment an.

通过一个300m和一个800m典型钻孔的实际测试结果,揭示超声波钻孔电视在地应力测量研究领域中的几个应用实例,如:岩层裂缝的检测、地应力测试段的选定、岩芯定向,特别是对水压致裂法形成的诱发裂缝和孔壁崩落的测定及分析,在地应力测量研究中将可显示出较强的优势,尤其是最大水平主应力方向的获取,更优于其它方法。

Several thousand groups of data obtained from the logs of four-arm dipmeter of15oil wells in Damintun depression of Liaohe oil field were collected.

文中介绍了井壁崩落法地应力测量的基本原理和方法 ,并利用此方法对辽河油田大民屯凹陷地区 15口井的地层倾角测井资料进行了统计和分析 ,绘制了崩落椭圆长轴优势方位图。

The horizontal principal ground stresses of some key wells are calculated by comprehensively using acoustic velocity method,borehole breakouts method,well deviation statistics method,acoustic emission method and hydraulic cracking method.

综合采用了声速法、井壁崩落法、井斜统计法、声发射法和水力压裂法对关键井点的水平主应力方向和大小进行计算,在此基础上运用有限单元法对牛35断块沙河街组三段Es3中现今地应力进行了数值模拟。

DETERMINATION OF THE ORIENTATION OF THE CRUSTAL STRESS !N CENTRAL HEBEI PLAIN BY BOREHOLE BREAKOUT METHOD

用孔壁崩落法测定冀中平原地区地壳应力方向

sublevel blast-hole method

深孔分段崩落采矿法

a slide of a large mass of dirt and rock down a mountain or cliff.

大块泥土或石头向山下或峭壁下的崩落。

MODEL TEST STUDY OF DEEP-HOLE INDUCED CAVING IN MINING ENVIRONMENT REGENERATION

开采环境再造深孔诱导崩落模型试验研究

Serial Blasting Crate Tests Confirm Medium-length Hole Blasting Parameter of Non-pillar Sublevel Caving Method

无底柱分段崩落法中深孔爆破参数试验

The Appling of Mining Method by Stage Avalanche and Shallow Bore Withhold Mine Coulping of XiaDian Gold Mine

夏甸金矿分段崩落与浅孔留矿耦合采矿方法的应用

Estimation of maximum horizontal principal stress magnitude from stress-induced well bore breakouts in the Cajon pass scientific research borehole

利用卡洪山口科学研究钻孔中应力引起的钻孔崩落估计最大水平主应力值

sudden fall of a mass of earth,mud,etc

（土、泥等的）突然崩落

sublevel undercut caving method

分段下部掏槽崩落开采

induced block caving

阶段人工崩落开采法

The snow sometimes slips, forming snowslides.

雪有时会滑落，造成雪崩。

Mechanism of capping rock collapse by no-pillar sublevel caving

无底柱分段崩落法开采顶板围岩崩落机理

The avalanche crashed down the mountainside.

这雪崩轰然一声落到山边。

top slicing combined with ore caving

下向水平分层崩落采矿法

The tombstone was lichenous and crumbling.

墓碑长满了地衣,已在崩落。

Some great empires have crumbled and fallen.

一些大帝国已崩溃衰落了。

a slide of large masses of snow and ice and mud down a mountain.

大块雪、冰和泥的混合物向山下的崩落。

(geology) the descent of a large mass of earth or rocks or snow etc..

（地质学）土、岩石或雪的崩落。