And he opened the bottomless pit; and there arose a smoke out of the pit, as the smoke of a great furnace; and the sun and the air were darkened by reason of the smoke of the pit. 他开了无底坑,便有烟从坑里往上冒,好像大火炉的烟。日头和天空,都因这烟昏暗了。
During joint mining of open-pit and underground, the ground air leakage control was realized by laying the capping layer on the open pit. 在露天与地下联合开采时期,控制地表漏风主要通过露天坑底铺设覆盖层来实现。
In the case of a pit drain, ensure an adequate air gap exists between the bottom of the drain line and the bottom of the pit. 在坑内排放时,请确保在排放管线和坑底部之间有适当的气隙存在。
In some cases the difference in atmospheric pressure causes the air to circulate naturally; in others a fan must be used to pump air into the mine. Waterproof and Shutoff for Closing of Pressured Dewatering Well Located in Foundation Pit 有些矿井利用大气压力差引起空气自然流动,有些矿井则必须用扇风机把空气压人井内。基坑内承压降水井封井的防水与封堵
The cutoff wall of cofferdam was constructed without river-close mouth. The construction measures of air closure first and then river closure are adopted to realize the quick excavation of deep foundation pit. 围堰防渗墙施工不留龙口,采用先闭气后截流的施工方案,实现深基坑开挖快速施工。
Air interval deep-hole blasting in open pit mine 全方位深松技术试验露天矿深孔空气间隔爆破
The situations of the underground air duct work of central air shaft are introduced and according to the construction method and scheme selection in foundation pit support and reinforcement under special condition ( normal running of the shaft) detailed discussion is made. 介绍了中央风井扇风机房风道地下部分的施工概况,对特殊条件下(即风井正常运转)的井架基础加固、基坑支护方案的选择及施工方法作了阐述。
Experiment result shows that after pre treatment through tilted plate interceptor and dissolved air flotation pit, oil content and suspended particles in outlet water meet the requirement of reinjection and thermal recovery boiler; 试验结果表明:稠油污水经过斜板隔油池和溶气气浮池预处理后,出水油含量和悬浮物均可达到回注和进热采锅炉的要求;
Electrically Operated Air Throttle in Mine Pit Air Throttle System Application 电动风门在矿井风门系统中应用
Gray prediction of air temperature of deep and hot mine pit in metal mine 金属矿山深热矿井空气温度的灰色预测
Study of control device for air quality of driver's cab in drilling machine of an open pit 露天矿钻机司机室空气质量调控装置研究
Through thermal determination of soaking pit side nozzle, we found that flame was too long, and air, gas were mixed unevenly in nozzle, which resulted in the uneven distribution of pit temperature, raised fuel consumption and influenced quality and output of steel. 通过对均热炉单侧上烧嘴的热工标定,发现烧嘴存在着火焰过长,空气和煤气混合不均匀,使得炉内温度场分布不够均匀,既增加燃料消耗又影响烧钢质量和产量。
Application of Air-permeable Boiling Plate in the Flate-bottom Ash Pit 透气沸腾板在平底灰库中的应用