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采样装置和解析计应安放在接近钻孔位置,将容积为1L 的瓶口敞开于矿内大气中,然后打水平钻孔。打钻开始后,打开采样器通过钻杆的负压系统,钻孔打到1.1m 深,煤样就足够用了,同时记录附近温度、大气压力和 CH_4浓度。采样器装满煤屑后,就得到钻进时间,并记录累计经历时间。把筛过0.40～0.63mm 煤样直接放到解析计煤样器中。当 CH_4从煤样进入解吸计时记下液柱初
Sampling device and analyzer should be placed close to the drilling position, the volume of 1L bottle opening in the mine atmosphere, and then hit the horizontal drilling. After the start of drilling, open the sampler through the negative pressure system of the drill pipe. When drilling the hole to a depth of 1.1m, the coal sample is enough to record the nearby temperature, atmospheric pressure and CH_4 concentration. After the sampler is filled with coal, you get the drilling time and record the accumulated elapsed time. The sieve 0.40 ~ 0.63mm coal sample directly into the analytical coal sampler. When CH_4 from the sample into the desorption time record liquid column early