soft rock strata

Back analysis of mechanics parameters for soft rock strata

软弱夹层与结构面的力学参数反演

Study on tunnel lining with reactive powder shotcrete in soft rock strata

软岩地层隧道喷射混凝土衬砌研究

Construction technique of open TBM for long railway tunnels in very hard or soft rock strata

开敞式TBM在铁路长隧道特硬岩、软岩地层的施工技术

A new Method for researching the earth stress of soft rock strata such as coal-bearing strata and its application

煤层等软岩层地应力研究新方法及其应用

Analysis of influenced regions and change trend for rock mass displacement due to mining of iron ore in soft rock strata

软岩地层地下铁矿开采岩体移动影响范围及变化趋势分析

Applying Soft Rock Strata to Carry the Grateful to Experiment Design to Dig a Bore Enlarge Bottom Stake Frusta

应用软岩层载荷试验设计挖孔扩底桩墩

And the surface deformation is continual and slow with a long duration of movement due to deep mining of iron ore in soft rock strata .

软岩地层深部铁矿开采引起的地表移动变形发展缓慢且周期较长。

The paper utilized the elastic-plastic finite element method to verify that the mechanics parameters had influence on ground subsidence caused by underground mining in soft rock strata .

文中用弹塑性有限元法分析了不同弹性模量、泊松比、内聚力、内摩擦角等物理力学参数对地表下沉的影响；

In the light of the drawbacks met in the double-layer lining in soft rock strata , permanent tunnel lining by single-layer reactive powder shotcrete is studied by using numerical simulation and test .

通过试验和数值模拟分析，研究了隧道喷射活性粉末混凝土单层衬砌支护技术。

Hose bit can be divided into cutter teeth and cone teeth , cone teeth for weathering of soft rock strata , and permafrost , cutter teeth used for drilling hard bedrock .

筒式钻头的切削具可分为截齿和牙轮，截齿筒状钻头用于风化软岩及永冻土地层钻进，牙轮筒式钻头用于硬质基岩钻进。

The bane that discussing the soft rock geologic strata closes to drill a hole badly and solve the method and measures , and put forward the actual suggestion within work .

论述了软岩地层封闭不良钻孔的危害及解决方法和措施，并提出了实际工作中的建议。