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。
Study on the layered roof compression-bending failure of roadways in coal seam;
煤巷层状顶板压曲破坏现象分析
The Destroy Mechanical Analysis of Tunnel with Stratified Roof
基于弹性薄板理论的巷道层状顶板破坏的能量法分析
The Study on the Destructive Mechanism and Law of Stratified Roof;
层状结构顶板破坏机理及其规律研究
The top surface in an enclosed space of a ship.
顶板密闭的船舱的顶层
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
Theory and Its Application Bolt and Cable Anchorage in Mining Roadway with Great Thick Complicated Roof Composed of Thin-bedded Strata;
薄层状巨厚复合顶板回采巷道锚杆锚索支护理论及应用研究
Anchoring Design for Thin-Layered Composite Roof Based on Beam-Arch Compound Structure
基于梁-拱式组合结构的薄层状复合顶板锚固设计
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
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
The paper detailedly formulates differentiated principle and method of property of stratum from concept of special roof separation.
本文从狭义顶板离层概念出发,详细地阐述了岩层性状的判别原理及方法。
Technology and Control of First Roof Caving at Fully Mechanized Coal Face with Hard and Massive Overlying Strata
厚层坚硬顶板综采工作面初次放顶技术管理
When a continental plate come to rest over a hot spot, the material rising from deeper layer creates a broad dome.
当大陆板块漂移到热点上方，来自地球深层的物质便形成了巨大的圆顶状隆起物。
and passed it along the topmost plank;
沿着最顶上一层木板刷起来。
promenade deck (covered upper deck of a passenger ship)
（客轮的上层有篷顶的）散步甲板.
Remember current topmost box, use as a 1-box template for new charts.
记录当前顶层图框，作为单图框模板
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
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