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。
The prediction of the hazard caused by weighting over great extent of top layer in mine worked-out section area;
本文建立了采空区大面积顶板冒落造成的冲击气浪的最大速度预测模型。
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
When the ore is particularly valuable, the walls and pillars are often removed at a later stage and the roof of the chamber is allowed to cave in. This technique is known as robbing.
如果矿石特别宝贵，矿壁和矿柱常在最后回采，让采场顶板冒落。这一技术叫矿柱回采。
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
Sparks from the chimney ignited the roof boards.
从烟囱里冒出的火星燃着了屋顶板。
Study on Top-Coal Caving and Drawing Capability and Roof Control in Hard Coal and Hard Roof Short Sub-Level Caving Fully Mechanized Face
“两硬”短工作面综放开采顶煤冒放性及顶板控制技术研究
Roof breaking law along top-coal caving face
综放开采沿工作面倾向顶板垮落规律
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
Study on Relationship between Depositing Characteristic of Falling Waste and Top Coal Recovery in Full-mechanized Caving
综放开采冒落矸石堆积特征与顶煤回收率关系研究
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。
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
In this paper a new viewpoint has been presented that the roof behavior prediction should include both the local roof fall prediction and the roof weighting prediction.
本文提出顶板动态监报应包括回采工作面局部冒顶的监报及顶板来压的预报这两个方面的观点。
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
They cut on day and night in spite of wine and rain.
他们顶风冒雨日夜兼程。
It will become you best to show no haste to take offence.
你顶好不要冒冒失失地发脾气。
The top surface in an enclosed space of a ship.
顶板密闭的船舱的顶层
The day was very hot, and heaps of flies, who were extending their inquisitive and adventurous perquisitions into all the glutinous little glasses near madame, fell dead at the bottom.
天很热，一群群的苍蝇作着探索性的冒险，爬到了老板娘身边带粘性的小酒杯里，落到杯底死去了。