摘要
瓦斯抽放钻孔合理深度的研究,可以更加有效地抽采瓦斯。通过对申家庄煤矿2303工作面上覆岩＂三带＂进行分析,得出该矿2303工作面采空区垮落带高度为9.4~13.8 m,裂隙带高度为37.09~73.4 m,平均55.25 m。通过对U型通风方式下采空区瓦斯运移进行模拟,得出在距采面垂高45~60 m的范围内,是瓦斯富集区。综合分析上覆岩层三带高度和采空区瓦斯运移规律,得出2303工作面瓦斯抽放钻孔终孔位置处于采空区上方45~60 m范围裂隙带内。
In order to drainage the goaf gas more effective, it needs to study gas drainage boreholes in gob reasonable depth. According to the analysis of the ＂three zones＂ height of mining overburden roof strata, it draws the heights of caved zone and fractured zone are 9.4 -13.8 m and 37.09 -73.4 m, the average 55.25 m. Simulation on gas migration in gob, it draws the scope of 45 - 60 m from vertical height of mining face is Gas enrichment area. Considering the ＂three zones＂ height of mining overburden roof strata and the rules of gas migration in gob, it draws gas drainage boreholes in gob should be 45 -60 m from gob and be in fractured zone.
出处
《煤》
2015年第5期1-4,共4页
Coal
基金
国家科技支撑计划专项资助(2012BAK09B02-1)
河南理工大学博士基金项目资助(B2014-005)
关键词
瓦斯抽放
垮落带
裂隙带
瓦斯运移
钻孔布置
gas drainage
caved zone
fractured zone
gas migration
bore arrangement
