在Freddies Consolidated矿业有限公司的3号井和1号井井口及53水平,同时安设了4个空盒气压计。通过对这4个空盒气压计的观测,可以清楚地看出,罐笼运行对气压计读数有明显的影响。在罐笼运行过程中,当罐笼位于观测点上面时的气压计读数明显低于罐笼位于观测点下面或井筒中无罐笼时的读数。罐笼的作用有点象汽缸中的活塞或滑动调节装置。 1号井和3号井的气压计读数的波动是一致的,这些读数都明显地受3号入风井里 At Freddies Consolidated Mines Ltd., No. 3 and No. 1 wellheads and at the 53 level, four empty barometers were installed. By observing the four empty barometers, it is clear that the cage operation has a significant effect on barometer readings. During the operation of the cage, the barometer reading when the cage was above the observation point was significantly lower than when the cage was below the observation point or when there was no cage in the wellbore. The function of the cage is a bit like a piston in a cylinder or a sliding adjustment. Fluctuations in the barometer readings of wells No. 1 and No. 3 were consistent and these were clearly affected by No. 3 inlet