collapsible top

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.

針對康家灘煤礦8#煤層綜放開采條件,采用專門設計的實驗裝置對其頂板冒落撞擊摩擦火花引爆瓦斯的可能性進行了實驗研究。

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＂塌陷經過和區域地質環境概況的論述，提出了其塌陷成因是由于古窯采空區頂板冒落溝通了煤系地層和第四系松散層間的地下水運動，加之區內采煤強力疏干加劇了地下水的侵蝕搬運作用，從而形成第四系松散層間的空洞，因地震誘發塌陷的觀點。

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

以棗泉煤礦12205首采面膠帶運輸巷頂板冒落控制為背景,采用彈性力學理論計算和數值分析方法,對復雜條件下大斷面巷道頂板冒落失穩機理進行分析。

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

通過對與頂板冒落機理有關的頂板壓力、構造、涌水量、支架變形等進行分析,提出了具體的防治措施,指出隨著新地質情況的出現,加強新技術、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.

為解決康家灣深部破碎帶礦體頂板冒落問題,實現礦體安全回采。

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

膠東某礦采場頂板冒落原因分析

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.

根據近幾年對石膏礦山的現場調查,結合巖體力學的相關理論和數值模擬技術,對石膏礦采場頂板冒落及大規模采空區頂板冒落機理作了簡要探討,據此提出了預防采空區冒落的措施。

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

根據國家安全生產監督管理局2005年的統計資料，礦山頂板冒落、采空區垮塌造成的人員傷亡和經濟損失，僅次于煤礦瓦斯突出災害，已經超過了道路交通事故躍升為第二位。

The prediction of the hazard caused by weighting over great extent of top layer in mine worked-out section area;

本文建立了采空區大面積頂板冒落造成的沖擊氣浪的最大速度預測模型。

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

復雜條件下大斷面巷道頂板冒落失穩分析

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.

如果礦石特別寶貴，礦壁和礦柱常在最后回采，讓采場頂板冒落。這一技術叫礦柱回采。

Application of π type steel girder in broken easy caving roof

π型鋼梁在破碎易冒落頂板中的應用

Sparks from the chimney ignited the roof boards.

從煙囪里冒出的火星燃著了屋頂板。

Study on Top-Coal Caving and Drawing Capability and Roof Control in Hard Coal and Hard Roof Short Sub-Level Caving Fully Mechanized Face

“兩硬”短工作面綜放開采頂煤冒放性及頂板控制技術研究

Roof breaking law along top-coal caving face

綜放開采沿工作面傾向頂板垮落規律

Mechanism of capping rock collapse by no-pillar sublevel caving

無底柱分段崩落法開采頂板圍巖崩落機理

Study on Relationship between Depositing Characteristic of Falling Waste and Top Coal Recovery in Full-mechanized Caving

綜放開采冒落矸石堆積特征與頂煤回收率關系研究

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

在天花板和一堵墻頂之間的角落里的塑造物。

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

采場頂板大面積垮落的颶風災害的理論研究

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

采空區頂板大面積垮落的空氣沖擊災害研究

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.

本文提出頂板動態監報應包括回采工作面局部冒頂的監報及頂板來壓的預報這兩個方面的觀點。

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

用油灰刀抬高防滑帶的一邊并且從車頂飾板上剝落它。

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

頂板誘導崩落機理及次生災變鏈式效應控制研究

They cut on day and night in spite of wine and rain.

他們頂風冒雨日夜兼程。

It will become you best to show no haste to take offence.

你頂好不要冒冒失失地發脾氣。

The top surface in an enclosed space of a ship.

頂板密閉的船艙的頂層

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.

天很熱，一群群的蒼蠅作著探索性的冒險，爬到了老板娘身邊帶粘性的小酒杯里，落到杯底死去了。