采矿与安全工程学报2015，Vol.32Issue(4)：559-564,6.DOI:10.13545/j.cnki.jmse.2015.04.006
煤巷侧帮压力及锚杆参数计算
Analytical calculation of the pressure in coal roadway sidewall and the bolt parameters
摘要
Abstract
For high production and efficiency, roadways at mining area are generally arranged along coal seams with large rectangular section. Due to weaker strength of coal seam compared with the overlying strata, obvious mine pressure and large scale of rupture in sidewalls often appear, which have always been great threats to coal roadways stability and production safety.Currently, being an important reinforcement technique, the high-strength anchor (cable) supporting system has been widely used to maintain coal roadway stability, but supporting parameters, such as anchor length, diameter, and anchor arrangement are mainly determined empirically, not dependent on theoretical calculation. Considering rectangular coal roadways and overlain horizontally layered rock and based on the key strata theory in ground control and the elastic foundation beam model, this paper has firstly obtained the analytical ex-pression of stress and the deformation of rock beam, to determine the pressure loading on sidewalls as well as the rupture range. On the basis of this, according to stability principle of geotechnical engineer-ing, the anchoring force required for maintaining sidewall stability has been further studied, which can provide a theoretical basis for determining supporting parameters. Finally, through an example, the pressure loading on sidewalls and the bolting parameters have been calculated,and the result is in good agreement with the engineering practice.关键词
矿业工程/矩形煤巷/锚杆/弹性地基梁/解析解Key words
mining engineering/rectangular coal roadway/anchor/elastic foundation beam/analytical solution分类
建筑与水利引用本文复制引用
范金成,蒋斌松,张强..煤巷侧帮压力及锚杆参数计算[J].采矿与安全工程学报,2015,32(4):559-564,6.基金项目
国家自然科学基金项目(51174196, 51204168) （51174196, 51204168）
国家重点基础研究发展计划(973)项目(2014CB046301) （973）
