No.8 coal in 99201 working face of Tunlan Mine was gas outburst danger area and No.9 coal was no outburst dangerous coal seam. In order to gas content of the 8 coal, gas drainage was performed in a high position during mining process. Gas content of 8 coal mining was calculated by using the method of sub source prediction so that safety of 8 coal mining could be analyzed. Its residual gas content was 4.52 ~ 6.06 m3 / t and reduced to non outburst zone after protective layer mining and gas drainage. The relative spacing was 56, protected layer was located in bending zone, only a few of 8 coal gas desorption could enter to working surface. Whereas, only a handful gas in 9 coals could enter to roof cracks on the basis of high drilling method and drilling mainly extracted gas in 8 coal.
赵勇俊. 屯兰矿8煤和9煤开采过程中瓦斯涌出量计算[J]. 煤炭与化工, 2017, 40(1): 158-160.
Zhao Yongjun. Calculation of gas emission in process of No.8 coal and No.9 coal in Tunlan Mine. CCI, 2017, 40(1): 158-160.
