blind ceiling

用法例句

Relevant provisions on seismic check of interior top column joints in the former Design Code of Reinforced Concrete Structures (GBJ10—89),were based on experiences,not on reliable testing data.

《混凝土结构设计规范》(GBJ1 0— 89)因缺乏试验依据 ,仅根据推断给出了钢筋混凝土框架顶层中间节点抗震验算的有关规定 ,而将主要构造规定留作空缺。

Design and application of horizontal long borehole for gas drainage in seam roof;

煤层顶板瓦斯抽放水平长钻孔的设计与应用

There are 6 types of REEs in coals and seam roofs: water\|soluble state (Ⅰ), ion\|exchangeable state(Ⅱ), carbonate state(Ⅲ), organism\|bonded state(Ⅳ), sialic state(Ⅴ),and sulfide state(Ⅵ).

在煤层顶板中 ,以硅铝化合物和硫化物结合态的稀土元素含量随着原子序数的增加而减少 ,以有机质结合态的稀土元素随着原子序数的增加而增加 ,且和煤层中稀土元素的赋存状态不同 ,表明不同沉积环境以及相同沉积环境对不同物质中的稀土元素的分馏效应是不同的 。

Application of the contact element method in analyzing the separation and deformation of the stratified roof;

接触单元法在层状顶板离层变形分析中的应用

By using the analyzing code called rock destroy process(RFPA~(2D)) analysis,the distortion destroy characteristic of tunnel with stratified roof and the destroy rules of tunnel with stratified roof under different lateral pressure and different ratio of thickness to span were analyzed.

利用东北大学自行开发研制的岩石破裂过程分析软件(RFPA2D),分析了层状顶板巷道围岩的变形破坏特征,以及不同侧压条件下和不同厚跨比条件下层状顶板的破坏规律。

The model is based on the nonlinear contact theory and constructed with the study results of the roof characters of full seam roadway with stratified roof and large section in Daning coal.

为研究层状顶板在巷道开挖后的离层变形特征,确定顶板离层的准确位置,根据非线性接触理论,针对大宁煤矿大断面全煤巷道层状顶板结构特征,层间接触面采用状态非线性模拟的方法,构建了有限元计算模型,并运用ANSYS计算软件进行了数值模拟。

The successful application of roof bed separation system realized synchronization monitor and can carry out effective ore pressure analysis.

顶板离层系统成功应用,实现巷道顶板离层的同步监测,可以进行有效的矿压分析,起到了验证和修改初始设计的作用,在发现顶板离层值超限后,可以及时对巷道采取补强措施,确保了巷道支护的安全,便于矿井对生产一线的信息掌握。

Based on the measuring methods of roof bed separation and combined with the spot practice, the beeline displacement sensor made up of Hall components are provided, which realize the untouched measuring of roof bed separation.

根据顶板离层的测量原理,结合现场实际,提出了以霍尔元件为基础的直线位移传感器,实现顶板 离层量的非接触测量,采用以单片机为核心的微电子技术实现监测信号的处理、显示、报警及传输功能,同 时实现在地面生产指挥中心对矿井巷道顶板离层状态的实时、远程监控。

Most of the monitoring systems for roof bed separation are designed based on RS-485 BUS,which is low in both signal transmission efficiency and reliability.

国内顶板离层计算机测控系统多采用RS-485总线,传输效率低,可靠性不高。

Detector of Coal Seam Roof Strata Based on S3C44B0X Framework

基于S3C44B0X构架下的煤层顶板岩层探测器

Fuzzy Comprehensive Evaluation and Prediction of Coal Seam-roof Stability Based

煤层顶板稳定性模糊综合评判和预测

Study on stability of main seam roof in dongjiahe minefield

澄合董家河井田煤层顶板稳定性评价

Determination of Critical Thickness of Stiff Roof in Coal Mine Based on Thick Plate Theory

基于厚板理论的水平煤层顶板临界厚度的分析

Distribution Rule and Control Techniques over Bed Separation Water in Coal Seam Roof

煤层顶板离层水体分布规律及防治技术探讨

The first caving roof sections in hard coal layers can effectively reduce the pressure during the course of caving and guarantee safe production and efficiency.

坚硬煤层顶板分段初次放顶,能够有效缓解放顶期间的顶板压力,保证安全生产,提高生产效率。

Study on Strata Mechanical Structure and Support Adaptability of Shallow Seam;

浅埋深煤层顶板力学结构与支架适应性研究

A research on the relation between mining caused coal seam roof fissures and mine gas distribution

煤层顶板采动裂隙与瓦斯分布关系研究

Application of the high density electrical prospecting to rich water survey of downhole coal plate.

高密度电法探测井下煤层顶板富水性效果

Effect of roof aquifers on the coalbed methane well pattern productivity

顶板含水层对煤层气井网产能的影响

Study on the Roof Bedding Separation and Anchoring Effect of Extremely Thick Coal Seam Large Section Roadway;

特厚煤层大断面煤巷顶板离层及锚固效应研究

Plowability of plow mining on thin and soft coal seam with hard roof

坚硬顶板松软薄煤层刨煤机开采可刨性研究

Optimization of coal seam roof and floor stripping equipment for use in Shengli East No.2 Open-pit Coal Mine

胜利东二露天煤矿煤层顶底板剥离设备优化

The selecting type of the support and roof control in soft rock coal seam floor

软岩底板煤层支架选型及顶板控制研究

Roadway Mechanized Excavation Technology for the Close Distance Seams for the Composite Lay Roof under Goaf

近距离煤层采空下复合层顶板巷道综掘技术

A new algorithm of building coal seam TIN considering reverse faults

考虑逆断层的煤层顶底板TIN生成的新方法

The Study of Roof Management Problems with Big Tilting Angle Coal Seam Applying Tilting Extraction

大倾角煤层仰斜开采顶板管理问题的研究

Study on Failure Law and Support Technique of Stratified and Weak Rock Roof of Roadway;

煤巷层状软岩顶板破坏规律及支护研究