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在矿井通风测定中,目前采用的一种比较精确的测量巷道断面的方法是圆形分度盘法,即按平均长度、平均半径、数格或用求积仪的办法,计算施测巷道的断面积(见《冶金安全》1975年第5期《矿井通风系统的测定》)。这样,当测点很多时,工作量很大,有的精确度也有限。据江西冶金学院有的同志计算统计:用圆形分度盘法测量巷道断面,在巷道高、宽相近的情况下精度较高;如果高、宽相差悬殊(如假顶、夹壁巷
In mine ventilation measurement, a more accurate method for measuring the cross-section of a roadway is the round indexing method, that is, calculating the average height, average radius, Cross-sectional area (see “Metallurgical Security” 1975 the fifth period “mine ventilation system Determination”). In this way, when measuring a lot of points, the workload is great, and some accuracy is limited. According to some comrades of Jiangxi Institute of Metallurgy calculation statistics: measuring the roadway section with a circular indexing method, high precision in the case of similar high and wide roadway; if the high and wide disparities (such as false top, folder Lane Lane