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为确定工作面附近区域的煤层的瓦斯含量而研制了一种仪器,该仪器如图所示.仪器由带有橡胶封孔器2的钻杆外套管1和钻杆的密封装置3组成(在用螺旋钻杆打钻时是波纹软管,而在用冲洗法打钻时用填料密封).在打钻过程中瓦斯通过套管4引入瓦斯流量计,而煤粉通过漏斗5进入煤粉储存器6.打钻的固定速度(1米/分)由固定在手电钻8上的绞盘7来控制.
An instrument was developed to determine the gas content of the coal seam in the area near the working face as shown in the figure.The instrument consisted of a drill pipe overtube 1 with a rubber sealer 2 and a seal 3 of the drill pipe Corrugated hoses are drilled when drilling with helical rods and with packing when drilling with flushing.) During drilling, gas is introduced into the gas flow meter through the casing 4 and the pulverized coal enters the pulverized coal storage through the funnel 5 6. Drilling fixed speed (1 m / min) is fixed by the winch 8 on the drill 8 to control.