煤层瓦斯含量是煤矿瓦斯防治的基础数据,煤层取样是现场瓦斯含量测定的关键。在平煤十矿戊8.9-20230和丁5.6-21180工作面进行了定点取样研究,采用深孔定点取样装置和孔口接粉两种方式进行取样,分别测定瓦斯含量并进行了对比分析。考察了深孔定点取样技术在平煤十矿取样的适用性,结果表明：深孔定点取样技术可实现定点、快速取样,取样深度达到72 m,取样时间控制在5 min以内。利用深孔定点取样技术取样进行瓦斯含量测定,可有效提高煤层瓦斯含量测定的准确性。%The coal-seam gas content is a basic datum for gas control in a coal mine,and the gas sampling from coal seam is the key of the site gas content measurement. Fixed-point sampling research was carried out in No. 20230 working face of the fifth 8-9 seam and No. 21180 working face of the fourth 5-6 seam in Pingdingshan No. 10 Mine,the long-hole fixed-point sampling device and drill cuttings collection at the hole collar were adopted for sampling,the gas content was measured and then analyzed. Investigation was made on the applicability of the long-hole fixed-point sampling technique in Pingdingshan No. 10 Mine, the results showed that using this technique can realize the fixed-point and rapid sampling,the sampling depth reached 72 m and the sampling time was controlled within 5 min. The use of the long-hole fixed-point sampling technique for sampling and gas content measurement can effectively improve the measurement accuracy of coal-seam gas content.
展开▼
