煤矿安全2017，Vol.48Issue(6)：20-23,4.DOI:10.13347/j.cnki.mkaq.2017.06.006
大直径抽采钻孔套管护孔强度研究
Study on Strength of Hole Pretection by Casing for Large Diameter Drilling Extraction Borehole
刘春刚 1孙珍平1
作者信息
- 1. 煤科集团沈阳研究院有限公司,辽宁抚顺113122
- 折叠
摘要
Abstract
In order to study hole protection by casing technology for large diameter extraction drilling,taking the first mining face at No.3 panel of Datong Coal Group Tashan Mine as the research background,the theoretical analysis,numerical simulation and field test are used to study the technology;according to the theory of plasticity,the analytical solution of the stress field in the plastic zone of borehole casing pipe and the ultimate strength of "casing-surrounding rock system" expression are deduced;FLAC3D is used to analyze the stress distribution of large diameter borehole with or without hole protection by casing hole,and results are verified by field.With the advancing of working face,the influence range and strength of mining on large diameter borehole is gradually increased no matter with or without hole protection by casing;the ultimate strength with hole protection by casing is 3.47 times that of without hole protection by easing.关键词
大直径钻孔/套管护孔/瓦斯抽采/塑性破坏/极限强度Key words
large diameter borehole/hole protection by casing/gas extraction/plastic damage/ultimate strength分类
矿业与冶金引用本文复制引用
刘春刚,孙珍平..大直径抽采钻孔套管护孔强度研究[J].煤矿安全,2017,48(6):20-23,4.
