查询词典 working paper

According as mechanism of rockburst and the state of coal seam in working face, this paper establishes numerical simulation model of rockburst.

本文主要从工作面冲击地压形成机理、工作面煤体受力状态出发建立了冲击地压数值计算模型。

This paper based on the low gas permeability coal seam 416 stope working face of Tongchuan mineral bureau,we analyzed the mechanism of the hydraulic cutting seam to improve the gas permeability coal seam,by this study,it shows the hydraulic cutting seam technology is effectual measure and it is provided with nicer practically and capacious foreground.

文章以铜川矿务局陈家山煤矿低透气性416综放工作面为研究背景，深入研究了水力割缝增强煤层透气性的作用机理，试验表明了水力割缝的确是一种提高低透气性煤层瓦斯抽放的有效措施，并具有良好的实用性和广阔的推广前景。

In this paper,by analyzing ground behavior measure data from the working face N101 in Qinyuan coal mine,strata pressure laws of fully mechanized top-coal caving face in three-soft seam are discussed.

通过对陕西秦源煤矿N101综放面实际观测数据进行分析，得出了&三软&复杂结构煤层综放面矿压显现活动规律，并对支架的适应性进行分析。

The paper presents a full analysis of the working principle and main technical parameters of high energy screw press, including the advantages and defects which are specially pointed out.

对高能螺旋压力机的工作原理和主要技术参数作了分析，指出其性能的优越性和结构上存在的问题，对该机型的改进和合理使用提供参

To study the performance of screw compressor, the key component in heat pump chiller, a mathematic model for simulating the behavior of the compressor's working process is presented in this paper, based on the thermodynamics of mass-variable system and the p-V indicator diagrams acquired by experiment.

为此，本文在实测压缩机在经济器补气工况、部分负荷工况、不同冷却方式等工况下p-V指示图的基础上，并基于变质量系统热力学原理，建立了螺杆制冷压缩机工作过程热力学数学模型，考虑了喷油、泄漏、热交换及补气等因素对工作过程的影响。

An automatic arc welding machine for saddle joint seam of big-diameter cylinders was designd and its structure, components, charicteristic and working principle are discribed in this paper.

介绍了大直径筒体马鞍形接缝的自动焊机的结构、组成和工作原理，以及设计的主要特点。

An automatic arc welding machine for saddle joint seam on large diameter cylinders was designed and its structure,components,characteristic and working principle were discribed in this paper.

介绍了大直径筒体马鞍形接缝自动焊机的结构和工作原理，以及设计的主要特点。推导出了该系统用来控制气体保护电弧焊焊枪运动轨迹的关键部件──凸轮的形状与尺寸的计算公式：l =l′-Z′=l′- [(R2 -r2 cos2 ψ) 1/ 2 -rsinψcosα]/sinα。

In order to study basic roof's destruction movement that affects working face in horizontal section top coal caving in mining steep seams, this paper analyses tension of roof using elastic and thin board theory and concludes criterion of roof destruction based on long and narrow thin board.

摘要为研究急斜煤层水平分段放顶煤开采过程中基本顶破坏活动对工作面的影响，根据急斜煤层基本顶具有倾斜狭长板的特点，运用弹性薄板理论对基本顶岩层进行了拉应力分析，得出了顶板破断的判别准则，建立了基本顶初次破断后形成的&铰接结构&的力学模型。

This paper reviews the grinding technology and its development, introduces the structure and working principle of roller press, focuses on the development and classification of grinding process, analyses of the advantages and disadvantages of all different process, and tells how to choose the grinding process.

本文综述了粉磨技术及其发展现状，介绍了辊压机的结构和工作原理，重点介绍了粉磨系统和粉磨工艺的发展及其分类，分析了国内各种不同工艺的优缺点，并给出粉磨工艺的选择方法。

Based on the working condition and abrasive mechanism of roller shells of RP bowl coal mills, this paper explains the alloy design and introduces the composition, structure, mechanical properties , heat treating process and abrasive wear tests of Cr20Mo2CulVTiBRE iron.

本文在分析RP型中速磨煤机辊套的工况及磨损机理的基础上，设计了用于辊套的新材质。

It is also known as one of the most poisonous naturally occurring substances.

它也被称为一个最自然发生的有毒物质。

The greatest stress is found at the location on the cross section where V is the largest.

最大应力出现在横截面上V为最大的地方。