底部结构

具体表现在：国外隧道重视底部结构，并在一定条件下（如高速）增加基底回填的弹性。

For example , the base structure of tunnel has been regarded and the resilience of the base is improved for satisfying some particular conditions ( such as high velocity ) abroad .

采用三维有限元弹塑性数值模拟方法，分析金川贫矿区高应力破碎岩体自然崩落法开采过程中底部结构的稳定性。

The stability of the base structure for the fracture rock-mass of great stress area in Jinchuan lean ore area mining by natural caving process is analyzed by the three-dimensional elastic-plasticity finite element numerical analogy .

用直接计算法确定砰击压力，再用DNV规范进行底部结构设计，对于后续船的改进均有指导意义。

It is significant for ship structure improvement latter to calculate slamming press with direct calculation method , and then to design bow structure with DNV rules .

搅拌槽底部结构对固体颗粒的临界离底悬浮转速（NJS）有显著的影响，浅锥底的NJS比平底的低14%以上；

And there was a second circulation zone close to the outside wall of the draft tube . The shallow conical bottom leads to a critical just off-bottom suspension impeller speed ( NJS ) at least 14 % lower than that in the flat bottom .

浅眼留矿法的底部结构演化及其效果

Bottom Structure Evolvement and Effect of Shallow Hole Shrinkage Stoping System

无斗颈堑沟电耙底部结构及应用

The Bottom Structure and Application of Non neck Trenching Electric Rake

散货船船艏底部结构砰击加强的设计研究

Design Research for the Bow Structure of Bulk under Slamming

金川贫矿区自然崩落法采场底部结构的稳定性

Base Stability of Jingchuan Lean Ore Area Mining by Natural Caving Method

振动连续出矿采场底部结构及工艺效果

Bottom structure of stope for vibrated continuous ore removal and technological results

自然崩落法铲运机出矿底部结构的探讨

Discussion on scraper ore drawing bottom structure in block caving

大型磷酸贮罐底部结构的设计与优化

Design and Optimization of Bottom Structure of Large Scale Phosphoric Acid Storage Tank

矿块崩落法拉底过程中底部结构应力分布及其参数优化

Stress distribution and parameter optimization during undercutting of a block caving mining method

倾斜薄金矿脉采场底部结构优选

Optimization of the stope sill structure in mining the inclined thin gold vein

矿块崩落法底部结构的支护方法

A support method for bottom structure in block caving

飞机货舱底部结构的腐蚀原因分析和改进的防腐措施

Corrosion Causes and Improved Anticorrosive Measures of the Bottom Structure of Cargo Compartment

安庆铜矿大孔采矿采场底部结构的改进

Modification of stope bottom structure in large-diameter longhole mining in Anqing Copper Mine

水波在周期性钻孔底部结构中的传播及其能带

Propagation of water wave over a periodically perforated bottom and the band structure

蓄热室底部结构对气流分布的影响

Influence of Regenerative Bottom Structures on Airflow Distribution

适合急倾斜薄矿脉机械化充填采矿法底部结构的探讨

Exploration on bottom structure suitable for mechanized back-filling method to mine steep narrow veins

关于水平分层充填采矿法的底部结构、顶底柱回采和中段高度等问题的探讨

On bottom structure , CROWN-AND-FLOOR pillar extraction and level height in horizontal cut-and-fill mining

瓦楞纸箱底部结构与强度设计

Corrugated Fiberboard Case Structure and Strength Design

优化研究了新型堑沟受矿振动助流底部结构。

Optimized and studied the new bottom structure with ore gathering by trench and vibration flow-aiding .

通过工程实践，介绍大型磷酸贮罐底部结构的设计方法。

Introduces the design method for bottom structure of large scale phosphoric acid storage tank based engineering practice .

浅孔留矿法平底栏栅底部结构研究与实践

Study on the structure of the flat - bottom of short - hole shrinkage stope with grid fence attached

有底柱阶段崩落法底部结构及放矿制度优化

Law of orebody caving by block caving system optimization of bottom structure and drawing regime in block caving with bottom pillars

矿块崩落法混凝土底部结构应力应变监测研究

THE STRESS-STRAIN MONITORING OF CONCRETE SUPPORT IN A BLOCK CAVING SYSTEM An Experimental Study on the Block Caving System in Fengshan Copper Mine

如此破碎的矿体与下盘围岩，难以形成足够稳定的底部结构及足够尺寸的空场。

Such breaking orebody and the footwall rocks difficult to form the enough stable structure of the bottom and the enough size stope .

底侧卸式矿车卸载站在一些矿山的使用中，出现底部结构加固钢轨脱落现象。

The reinforcing rails of the bottom structure in dumping station for side bottom dumping cars occasionally drop off during operation in many mines .

笔者认为此种开采地质条件，适宜选用没有底部结构、无需形成空场、采准工程对矿体切割程度小、分散出矿方法灵活的采矿方法。

Writer hold that it should choose the non-bottom structure , need 't to form stope , development project is little to orebody cutting , separating transportation ore and flexible mining method .

通过分析对撞式流化床气流粉碎机的喷嘴结构、分级叶轮型式、加料口位置及底部结构等，阐述了该型气流粉碎机的结构型式及特点。

The paper presents the internal structures and performance features of the fluidized bed opposed jet mill based on the jet nozzles structure , impeller types , feeding inlet and bottom structure .