煤矿安全2017，Vol.48Issue(3)：21-24,4.DOI:10.13347/j.cnki.mkaq.2017.03.006
煤层钻孔损伤区半径的影响研究
Influence Study on Coal Seam Drilling Damage Radius
摘要
Abstract
The collapse problem of coal seam drilling hole which restricts the efficiency of gas drainage and seriously affects the safety of coal production.Studying the damage zone radius of coal body drilling has important significance for solving the collapse hole problems of coal seam hole drainage.Tests were carried out to determine the basic mechanical parameters of 4 kinds of coal samples,which were measured by uniaxial compression,Brazil splitting and firmness coefficient;and the basic mechanical parameters of coal samples were obtained.Based on this,we established the mechanical model of coal seam drilling,the numerical analysis of the influence of ground stress,lateral pressure coefficient and firmness coefficient on coal seam drilling damage zone radius.The study shows that the radius of vertical direction of coal drilling damage zone decreases and the horizontal direction increases gradually with the increase of ground stress;with the increase of lateral pressure coefficient,the vertical damage radius increases gradually,the horizontal direction decreases gradually;with the increase of coal firmness coefficient,the drilling damage zone radius decreases gradually.关键词
煤体/损伤区半径/地应力/坚固性系数/数值模拟Key words
coalbody/radius of damage zone/ground stress/firmness coefficient/numerical simulation分类
矿业与冶金引用本文复制引用
王宾宾,岳高伟,毕伟..煤层钻孔损伤区半径的影响研究[J].煤矿安全,2017,48(3):21-24,4.基金项目
河南省科技攻关计划资助项目(142102310268) （142102310268）
河南省高校科技创新团队支持计划资助项目(15IRTSTHN029) （15IRTSTHN029）
