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caving     
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  崩落
     No dilution Drawing in Sublevel Caving
     无底柱分段崩落法不贫化放矿
短句来源
     A SUPPORT METHOD FOR BOTTOM STRUCTURE IN BLOCK CAVING
     矿块崩落法底部结构的支护方法
短句来源
     Study of the Computer Random Simulation of Ore Drawing for Caving Method
     崩落法放矿计算机随机模拟的研究
短句来源
     Character of Density Field about Loose Mine-rock in Caving Method
     崩落矿岩散体密度场特征
短句来源
     D-FLAC software was used to establish the model for dynamic analysis of the ground deformation caused by underground mining, which was based on the technological flowsheet of caving method.
     采用 2D -FLAC软件 ,依崩落法工艺流程建立地下开采地表变形动态分析模型。
短句来源
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     Dynamical Geology Evaluation and Controlling Methods of the Roof Stability for Longwall Top-coal Caving Face
     综面顶板岩体稳定性地质动态评价及控制
短句来源
     Prospects for Technology Development of Fully Mechanized Sublevel Caving in China Very Thick Seam (Ⅱ)
     关于我国特厚煤层综采顶煤开采技术发展的前景(下)
短句来源
     ANALYSIS OF ROOF COAL MEDIUM STATE IN CAVING ROOF COAL MINING FACE
     顶煤工作面顶煤介质状态分析
短句来源
     THEORY AND PRACTICE OF SUB-LEVEL CAVING METHOD IN CHINA
     我国顶煤开采的理论研究与实践
短句来源
     The Structure Features and Development Trend of Coal Caving Supports in China
     我国顶煤支架结构特点及发展趋向
短句来源
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  崩落法
     No dilution Drawing in Sublevel Caving
     无底柱分段崩落法不贫化放矿
短句来源
     Study of the Computer Random Simulation of Ore Drawing for Caving Method
     崩落法放矿计算机随机模拟的研究
短句来源
     A SUPPORT METHOD FOR BOTTOM STRUCTURE IN BLOCK CAVING
     矿块崩落法底部结构的支护方法
短句来源
     D-FLAC software was used to establish the model for dynamic analysis of the ground deformation caused by underground mining, which was based on the technological flowsheet of caving method.
     采用 2D -FLAC软件 ,依崩落法工艺流程建立地下开采地表变形动态分析模型。
短句来源
     RESEARCH ON APPLICATIONS OF DISCRETE ELEMENT METHOD IN ORE DRAWING FOR CAVING SYSTEM
     离散元法在崩落法放矿中应用的研究
短句来源
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  冒顶
     The relationship between the states of rock mass transferring from stable state to destructive state and the acoustic emission was educed through field study,as a result,this would provide a theoretical criterion for the prediction of roof caving in stope.
     通过现场研究得出岩体从稳定至破坏状态与声发射之间的关系 ,从而为采场冒顶片帮预报提供了理论依据。
短句来源
     Through analysis to one roof caving accident happened in bolt supporting gateway of 26121,this article raises the pertinent prevention measures so as to prevent accidents happened under similar conditions.
     通过对26121上顺槽锚杆支护冒顶事故的剖析,提出了针对防范措施,在以后类似条件下施工中杜绝事故的发生。
短句来源
     U-type steel shed support can control breaking surrounding rock, prevent roof leakage, caving and wall caving, but this support is passive support, and contact with round irregularly, pressed unbalance, leading to the deformed of surrounding rock accelerating, support period is short and the cost is high;
     U型钢棚支护能够控制破碎围岩,防止漏顶、冒顶和片帮,但这种支护为被动支护,且与巷道周边接触不规则,受压不均,导致围岩变形速度较快,支护周期短,支护成本较高;
短句来源
     Application of Bolting and Shotcreting Grouting with Wire Mesh in Caving Tunnel
     锚网梁喷注联合支护技术在大冒顶区的应用
短句来源
     This paper analyzes the reasons of influencing the per unit yield of the working faces from aspects of the local caving, electromechanical equipment management, personnel quality and labor organization, and points out that the best path for increasing per unit yield on comprehensive mechanized coal mining faces is to establish the high- yield and high- effect team manned by high- quality technicians, make rational procedure arrangement and good labor organization, and adopt scientific managerial methods.
     从局部冒顶、机电设备管理、人的自身素质以及劳动组织方面对影响工作面单产的原因进行了分析,指出建立高产高效队,配之以高素质技术人才,以合理的工序安排,良好的劳动组织作保证,借助科学的管理方法,是提高综采工作面单产的最佳途径。
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  caving
This effect is apparently decisive for the initiation of a zone of instabilities ahead of the crack tip, and, consequently, for conditions favorable to macrocrack caving.
      
Experience with the strengthening of beds and foundations beneath structures on soils prone to caving in Ufa is described.
      
Strengthening beds and foundations during the rehabilitation of industrial structures on soils prone to caving
      
Sampling for microfossils in exploratory wells in basins with hydrocarbon potential is subject to considerable uncertainty, mainly because the samples usually are small and subject to caving.
      
The modeling with the finite element method was employed to study the block caving process for mining the Milas diasporite deposit in Western Turkey.
      
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At the New Pit № 1 of Hokang Colliery during these years, satisfactory results have been obtained in adopting precautionary mud-flushing technique to prevent sponta-neous combustion in working extra-thick seams by slice mining with complete caving of roof.This article was written on the basis of the author's experience at this pit. Stress is laid upon the method of mud-flushing, certain technical problems on flushing, condi-tion of mud distribution in caving area and the comparison with hydraulic...

At the New Pit № 1 of Hokang Colliery during these years, satisfactory results have been obtained in adopting precautionary mud-flushing technique to prevent sponta-neous combustion in working extra-thick seams by slice mining with complete caving of roof.This article was written on the basis of the author's experience at this pit. Stress is laid upon the method of mud-flushing, certain technical problems on flushing, condi-tion of mud distribution in caving area and the comparison with hydraulic sand stow-ing.Certain advantages in employing this method are also given.

鹤岗新一煤矿几年来,在特厚煤层中采用分层开采全部陷落预防性灌浆方法防止采空区自然发火,取得良好效果.本文系作者根据该矿之经验写成.重点介绍了泥浆灌注方法;灌注中若干技术问题;泥浆在冒落区的分布状态.指出采用此法具有一定优越性.

The 15-foot seam and its underlying 8-foot seam of the Tu-er-ping Mine, constitu-ting a group of thick seams with hard roofs lying closely together. This article is based upon obervations made on the 15-foot seam while mining was carried out at the № 2647 Face.Roof control was accomplished by forced-down caving, with entire roof subsiden-ce, thereby noting the breaking-up and the shifting of the roof, for ascertaining the rock pressure and its natural law.Such study brings benefit as to the improvement...

The 15-foot seam and its underlying 8-foot seam of the Tu-er-ping Mine, constitu-ting a group of thick seams with hard roofs lying closely together. This article is based upon obervations made on the 15-foot seam while mining was carried out at the № 2647 Face.Roof control was accomplished by forced-down caving, with entire roof subsiden-ce, thereby noting the breaking-up and the shifting of the roof, for ascertaining the rock pressure and its natural law.Such study brings benefit as to the improvement on roof control. By using explo-sives in blasting down the hard roof, the immediate roof of limestone was set free.Further-more, as the thick seam is mined out in layers, the permanent roof, being intact, it does not threaten the safety of mining work underneath.

杜儿坪矿十五尺煤层与下伏八尺煤层组成一组缓倾斜、硬顶板、近距离的厚煤层群.本文根据开采十五尺煤层调查资料和杜儿坪矿该煤层的2647回采工作面现场观测资料,分析了十五尺煤层坚硬顶板的垮落性,在采用人工强制冒顶全部垮落法管理顶板的条件下,顶板岩石的破坏和活动过程以及引起的矿山压力及其显现规律.这对于改善顶板管理方法是具有重大的实际意义.通过分析表明:十五尺煤层坚硬顶板在采用炸药爆破顶板,消除直接顶之石灰岩的绞接作用,顶板是能够冒落的.并且,采用分层开采能够限制老顶活动对工作空间的威胁.

The paper is written with the attempt to describe the original body (shape and position) possessed by the drawn-ore grains and the moving rules relevant to it,esp for the case that the ore grains drawn from multi-drawpoint during caving.It is of significance to predict the courses of both ore loss and ore dilution and to determine the optimal structural parameters for mining process.As ore grains drawn form single drawpoint which located at the bottom of stope,expressions for the transformation of position...

The paper is written with the attempt to describe the original body (shape and position) possessed by the drawn-ore grains and the moving rules relevant to it,esp for the case that the ore grains drawn from multi-drawpoint during caving.It is of significance to predict the courses of both ore loss and ore dilution and to determine the optimal structural parameters for mining process.As ore grains drawn form single drawpoint which located at the bottom of stope,expressions for the transformation of position of a moving point (an ore grain) in X-Z coordinates areor in abbreviated form(Z,Z) =Ω0O(X0,Z0) (1)where X0,Z0-original position;X,Z-position after moving;Q-quantity of drawn-ore grains (volume);B-statistical coefficient of mediums;Ω-transformation operator. Transformation of positions for a point, a line, a surface or a boby in moving field will be attained by use of these exspressions.As for the case of multi-drawpoint, ore-drawings are arranged in due succession of drawpoints or arraies of drawpoints. The ore-drawing from 2nd point is just behind that from 1st point and so the transformation presented by formula(l) has occured to influence the 2nd point ore-drawing. Obviously, such a body(shape and position) transformed by use of formula(1),having been, influenced by the ore-drawing form its adjacent fore-point, is not in its primarily original state. In order to recover the primarily original body of drawn-ore grains from 2nd point, a new concept of reciprocal transformation of positions introduced herewhere Ki1-a tentative body obtained from the ore-drawing from thei-th point by the transformation according as formula(l);Ki-actually original body recovered to its more previouslystate before ore-drawing from the (i-1)th point by the reciprocal transformation according as formula (2).Fig.4 and Fig,6 illustrate the corresponding relation between figures of K2i and K2.In addition, a numerical simulation has been made by computer in order to find out the figure of K2 (Fig.8). Such a figure gained from numerical simulation is much the same comparing with the result of analysis by above-montioned reciprocal transformation of positions.

经采矿场下面漏孔放矿时,矿石颗粒点移动情况(坐标变换)用式(1)和式(2)表述。用这个方程可以求算移动场内的点、线、面、体的座标位置的变换。 多漏孔放矿时,可按放矿的逆顺序,对各漏孔施行逆变换,即依次将前一漏孔放出的矿石Q_1塞回去(放出-Q_1),便可求得从后一漏孔放出矿石Q_2的原来形态和位置——放出体。如此,继续进行逆变换,就可以求出全部漏孔的放出体。

 
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