摘要
为确定十二矿顺层抽采钻孔的合理封孔长度,提高抽采效果,分析了封孔长度与巷道应力"三带"的关系,采用数值模拟和现场实测的方法确定了巷道应力"三带"的分布特征:卸压带范围为煤壁向里0～4 m,应力集中带范围为煤壁向里4～10 m,原始应力带范围为煤壁向里10m以深,从而确定了合理封孔长度为10 m,并通过现场考察,验证了封孔长度为10 m是合理的。
In order to determine the reasonable sealing length of bedding extraction borehole in No. 12 coal mine, and to improve the extraction effect, the relationship between the sealing length and ＂three zones＂ of stress is analyzed in this paper. The distribution char- acteristics of roadway stress ＂three zones＂ are determined by numerical simulation and field measurement method. The range of pres- sure released zone is from the coal wall to the inside 0 ~ 4 m ; the range of stress concentration belt is from coal wall to the inside 4 10 m; and the range of original stress belt is from coal wall to the inside 10 m deep, which determines a reasonable sealing length of 10 m. Through on -site test inspection, it is verified that the sealing length of 10 m is reasonable.
出处
《煤矿安全》
CAS
北大核心
2012年第8期8-10,共3页
Safety in Coal Mines
关键词
瓦斯抽采
封孔长度
应力“三带”
数值模拟
gas extraction
sealing length
＂three zones＂ of stress
numerical simulation
