摘要
为提高急倾斜煤层上山掘进过程中煤与瓦斯突出危险性预测的准确性,首先,基于Mohr-Coulomb准则建立钻孔瓦斯流动模型;其次,通过数值模拟定量分析钻孔瓦斯初始涌出量和瓦斯压力之间的关系;最后,使用ZTL20/1000-Z型矿用隔爆预测装置对贵州洪兴煤矿111707上山掘进面进行现场试验。结果表明:钻孔初始瓦斯涌出量与瓦斯压力呈正相关关系,其相关系数为0.977 3,钻孔初始瓦斯涌出量可以作为预测煤与瓦斯突出的一项参考指标;随着钻孔深度的增加,钻孔初始瓦斯流量会经历“稳定—增加—降低—稳定”4个阶段,钻孔瓦斯流量峰面积可以反映煤与瓦斯突出危险性。
The aim of the present work focuses on the accuracy improvement of coal and gas outburst risk prediction in the process of uphill driving in steeply inclined coal seam.Firstly,a borehole gas flow model was established based on Mohr-Coulomb criterion.Secondly,the relationship between initial gas emission and gas pressure was quantitatively analyzed by numerical simulation.Finally,the ZTL20/1000-Z mine flameproof prediction device was used to predict the risk of coal and gas outburst in 111707 uphill heading face of Guizhou Hongxing coal mine.The results show that the initial gas emission of the borehole is positively correlated with the gas pressure,and the correlation coefficient is 0.9773.The initial gas emission of the borehole can be used as a reference index in predicting coal and gas outburst.With the increase of borehole depth,the initial gas flow of borehole will experience four stages of“stability-increase-decrease-stability”.The peak area of borehole gas flow can reflect the risk of coal and gas outburst.
作者
陈诚
田世祥
赵佳佳
刘正堂
CHEN Cheng;TIAN Shixiang;ZHAO Jiajia;LIU Zhengtang(Mining College,Guizhou University,Guiyang 550025,China;Hongxing Coal Mine,Liupanshui Hidili Industrial com-pany Limited,Liupanshui,Guizhou 553537,China)
出处
《中国科技论文》
CAS
2024年第1期43-49,共7页
China Sciencepaper
基金
国家自然科学基金资助项目(52104079)
贵州省省级科技计划项目(黔科合支撑[2020]4Y050)。
