weighing down

Using this model,we have simulated the roof caving characteristic and the stress distribution of surrounding rocks and analyzed the deformation feature of the surrounding rocks in the working face end.

02D数值模拟软件建立相应的分析模型,模拟了煤层开采过程中的顶板垮落和围岩应力分布特征,重点分析了工作面上下端头的围岩应力分布规律及变形特点;结合具体生产矿井的综采工作面现场情况,得出了综采工作面推进过程中的周期来压、采动影响范围和煤壁片帮等矿压显现特征,并针对开采中出现的问题提出了相应的安全防范措施。

Similar simulated experiment for continuous mining and roof dilapidation of ore body underground;

矿体地下连续开采顶板崩落相似模拟试验

Based on the the fully-mechanized top-coal caving mining of 8~# coal bed in Kangjiatan coal mine,the probability of the gas explosion induced by the impact-friction sparks during roof collapse was studied with the special designed experimental instruments.

针对康家滩煤矿8#煤层综放开采条件,采用专门设计的实验装置对其顶板冒落撞击摩擦火花引爆瓦斯的可能性进行了实验研究。

The analytical reason of the subsidence is that old working roof collapse strengthen the vertical morenent of underground water between coal-series formation and Quaternary loose formation, the strong drain of coal mining in the area intonsify the erosion and transporting action of underground water, the Quaternary carity forms and the earthquake cause to ha.

２１＂塌陷经过和区域地质环境概况的论述，提出了其塌陷成因是由于古窑采空区顶板冒落沟通了煤系地层和第四系松散层间的地下水运动，加之区内采煤强力疏干加剧了地下水的侵蚀搬运作用，从而形成第四系松散层间的空洞，因地震诱发塌陷的观点。

For roof collapse control of the belt-conveying-roadway of No.

以枣泉煤矿12205首采面胶带运输巷顶板冒落控制为背景,采用弹性力学理论计算和数值分析方法,对复杂条件下大断面巷道顶板冒落失稳机理进行分析。

Roof pressure,structure,water volume,support deformation that are related to the roof caving mechanism are analyzed.

通过对与顶板冒落机理有关的顶板压力、构造、涌水量、支架变形等进行分析,提出了具体的防治措施,指出随着新地质情况的出现,加强新技术、新方法研究的重要性。

In order to solve the problem of roof caving of orebody in deep broken zone of Kangjiawan mine so as to realize safety mining,we performed the mechanical experiment of rocks,compared and numerically simulated the roof controlling measures,tested the mechanical parameters of rocks,analyzed and classified caving phenomenon.

为解决康家湾深部破碎带矿体顶板冒落问题,实现矿体安全回采。

Analysis on roof falling causes of certain mine's stope in Jiaodong area;

胶东某矿采场顶板冒落原因分析

On the basis of the investigation,with the rockmass mechanics and numerical simulation, the mechanism of roof falling of stope and mined out area on a large scale are discussed compendiously.

根据近几年对石膏矿山的现场调查,结合岩体力学的相关理论和数值模拟技术,对石膏矿采场顶板冒落及大规模采空区顶板冒落机理作了简要探讨,据此提出了预防采空区冒落的措施。

Especially in non-coal mine, the roof fallingaccidents have led to serious consequences.

根据国家安全生产监督管理局2005年的统计资料，矿山顶板冒落、采空区垮塌造成的人员伤亡和经济损失，仅次于煤矿瓦斯突出灾害，已经超过了道路交通事故跃升为第二位。

Roof breaking law along top-coal caving face

综放开采沿工作面倾向顶板垮落规律

The Theoretical Study on Cyclone Disaster Caused by Stope Roof Falling over Great Extent;

采场顶板大面积垮落的飓风灾害的理论研究

Research on Air Bumping Disaster Induced by Large Roof Falling in Goaf

采空区顶板大面积垮落的空气冲击灾害研究

Main roof first collapse law and measure of controlling roof in seam with approximate shallow depth

近浅埋煤层老顶初次垮落规律及控顶措施

Application of π type steel girder in broken easy caving roof

π型钢梁在破碎易冒落顶板中的应用

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

United we stand, divided we fall.

团结顶得住，分裂必垮台。

a molding at the corner between the ceiling and the top of a wall.

在天花板和一堵墙顶之间的角落里的塑造物。

Analysis of Roof Caving Instability Mechanism of Large-Section Roadway Under Complex Conditions

复杂条件下大断面巷道顶板冒落失稳分析

The roof had fallen down and the windows were broken.

屋顶己经垮下来了，窗户也破了。

Lift one edge of each skid strip with a putty knife and peel it from roof panel.

用油灰刀抬高防滑带的一边并且从车顶饰板上剥落它。

Study on Mechanism of Induced Caving Roof and Control of Its Secondary Catastrophe Chain Effect

顶板诱导崩落机理及次生灾变链式效应控制研究

Haines from the corner where he was knotting easily a scarf about the loose collar of his tennis shirt spoke:

海恩斯在角落里正松垮垮地往他的网球衫那宽松领口系领巾，他说：

The top surface in an enclosed space of a ship.

顶板密闭的船舱的顶层

Separate trim panel from roof panel.

从车顶板分离装饰板。

All beat her-because of her backwardness, because of her military backwardness, cultural backwardness, political backwardness, industrial backwardness, agricultural back wardness.

谁都能打垮它--因为它落后，军事落后，文化落后，政治落后，工业落后，农业落后。

A slab on the top of the capital of a column.

圆柱顶板圆柱柱顶上的背板

EStrengthen the management of roadway roof to reduce the roof accident

加强巷道顶板管理 减少顶板事故发生