煤田地质与勘探2016，Vol.44Issue(4)：20-24,29,6.DOI:10.3969/j.issn.1001-1986.2016.04.004
高瓦斯特厚煤层下分层千米钻孔瓦斯抽采技术
Gas extraction technology of kilometer hole in lower slice of thick and high-gas seams
周西华 1王鹏辉 2门金龙 1赵海波 2毕建乙1
作者信息
- 1. 辽宁工程技术大学安全科学与工程学院，辽宁 阜新 123000
- 2. 矿山热动力灾害与防治教育部重点实验室，辽宁 阜新 123000
- 折叠
摘要
Abstract
Aiming at the problem of frequent gas overrun in working face during mining higher slice in thick and high–gas seams, on the basis of destruction extent and transport mechanisms of relieved gas in lower slice under the action of disturbance stress, gas extraction with kilometer hole in lower slice was studied with the background of working face 205 in Tingnan mine. Theoretical calculation and FLAC3D numerical simulation indicate the maximum lower slice plastic failure depth is approximate 13 m, the optimal layout region of kilometer directional hole is 6~9 m below the floor of working face. Monitoring the gas extraction concentration of kilometer drilling in hole positions in the process of working face advancing shows kilometer hole with optimal extraction effect is be-tween 6 m and 9 m, gas extraction concentration in drilling field continues to increase with working face advancing, and finally increases to approximately 68%. The study realized long–time and high concentration extraction in lower slice of thick and high–gas seams.关键词
高瓦斯特厚煤层/下分层瓦斯抽采/千米钻孔/底板采动裂隙/卸压增流Key words
thick and high-gas seams/gas extraction in lower slice/kilometer hole/mining-induced fracture in floor/pressure relief and fluid increase分类
天文与地球科学引用本文复制引用
周西华,王鹏辉,门金龙,赵海波,毕建乙..高瓦斯特厚煤层下分层千米钻孔瓦斯抽采技术[J].煤田地质与勘探,2016,44(4):20-24,29,6.
