工作面

A discussion is presented on the error compensation of the reflecting planes of polygon s in accurate angular measurement using autocollimator and polygon s.

讨论了利用多面棱体和自准直仪进行精密角度检定时多面棱体工作面偏差的补偿问题，给出了工作面偏差补偿符号的判定方法。

The research shows that gas concentration shows generally an increasing tendency along the working face airflow direction, from 0.095% to 0.18%, under the effect of gas drainage points, up-and-down changing locally; gas distribution in a transect of working face is unequal, under the effect of gas emission, ventilation and drainage, the gas concentration near coal wall is larger than that near goaf, which is a concave function distribution within a distance of 1876.5 m from the inlet of working face, after greater than 76.5m, which is a decreasing distribution from coal wall to goaf.

研究表明，该工作面瓦斯体积分数沿风流方向总体呈逐渐增加趋势，介于0.095%~0.18%之间，受瓦斯抽放点的影响，局部有起伏变化；工作面横断面瓦斯体积分数分布不均匀，受瓦斯涌出、通风和抽放的影响，靠近煤壁侧瓦斯体积分数要高于采空区侧，在距离进风口约18~76.5 m范围内为凹函数分布，大于76.5 m之后，从煤壁至采空区为单调下降函数分布。

A passing crosscut safety technology of fully mechanized caving face in steeply-inclined coal seam is introduced.

介绍了急倾斜特厚煤层综放工作面过煤门安全技术在大洪沟煤矿的实施过程，为同类条件下综放工作面过煤门提供了成功经验。

In large dip angle mining face,the antis-kid and anti-collapse question on hydraulic support is a key to mining successfully.

在大倾角工作面中，液压支架的防倒防滑问题是工作面能否顺利实现开采的关键。

Based on the above-mentioned models, the soil pre-reinforcement effects for the arch and frontispiece part of tunnel heading, and a gradually instability concept of face was explained.

4通过建立的一系列工作面地层预加固力学行为模型的数值解，以及有限元数值模拟的结果，对浅埋暗挖法地铁隧道工作面地层预加固参数的设计与选择进行了探索。

This paper studied the plotting of the hazard zone of Wulong mine's rockburst. This paper used ANSYS program to set up model then put up stress analysis. Taking the 311 working face of Wulong coal mine as an example, the contours of vertical stresses in the roof and floor are obtained corresponding to the mining distances of 100 m ,200 m ,300 m and 400 m respectively.It is indicated that the magnitude of vertical stress is the important influencing factor of rockburst.

用ANSYS建立模型进行应力分析，通过模拟开采3311，3l1，213工作面得到了推采距离为100、200、300及400 m 时的顶底板y向应力等值线图，指出顶板y 向应力大小是判断冲击地压是否发生的重要因素，当开采l00 m 和400 m 时工作面迎头位置产生高应力集中区，极易发生冲击地压事故。

Based on the condition of No. 4324 super-wide fully mechanized top-coal caving island face in Xinglongzhuang coal mine of Yanzhou Mining Group, the setting load and working resistance of hydraulic powered support were continuously recorded by means of the self-recording pressure instrument.

基于兖矿集团兴隆庄煤矿4324超长综放孤岛面开采条件，采用圆图压力自计仪，连续记录液压支架的初撑力和工作阻力，分析了综放工作面液压支架支护阻力的循环变化规律，工作面沿倾斜方向上的压力分布特征。

In this paper, the principle of controlled blasting is studied firstly; then a practical experiment about the long hole standing shot controlled blasting technology is performed and some blasting parameters used in the loose blasting are obtained.

首先研究了高岭土工作面松动爆破原理，并进行了工作面现场深孔松动控制爆破技术的试验研究，获得了该矿区高岭土矿深孔松动爆破参数。

Based on the observation data,the main load-bearing characteristics of hanging-sliding support s in a sublevel caving face are studied,and the adaptability of the supports is analyzed.

根据悬移支架放顶煤工作面支架阻力的实际观测数据，论述了放顶煤工作面悬移支架的主要受力特征，并对支架的适应性进行了分析。

Mine production Dispatching winch system is the most commonly used in electrical and mechanical equipment, mainly for underground coal mine and other mines in the dumping of less than 30 degrees angle of the roadway in the haulage mine car handling and other auxiliary work, can also be used for mining and tunneling Face Face loading station on the scheduling grouping tramcar.

调度绞车是矿山生产系统中最常用的机电设备，主要用于煤矿井下和其他矿山在倾角度小于30度的巷道中拖运矿车及其它辅助搬运工作，也可用于回采工作面和掘进工作面装载站上调度编组矿车。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。