摘要
以伊犁一矿3~#煤主运大巷为工程背景,通过室内实验研究其底鼓机理及变形分布特征;在此基础上,提出了锚注+钢筋混凝土底板主被动联合控制方案,通过数值模拟分析了底板无支护与联合控制方案下的围岩位移场、应力场及塑性区分布特征。结果表明,锚注+钢筋混凝土底板联合控制方案能够有效控制底板变形,同时减小顶板沉降及两帮收敛,减小围岩塑性区发展;现场监测结果与数值分析结果较为相近,验证了该支护方案具有良好的变形控制效果。
Taking the main haulage roadway of Yili No.1 mine as engineering background, the roadway floor heave deformation characteristics and produce mechanism were summarized and analyzed with laboratory experiment. Based on this, a joint control scheme of bolt-grouting support and reinforced concrete floor that combined active support with passive support is presented, and the distribution laws of displacement, stress fields and plastic zones of roadway surrounding rock using this joint control scheme or not were analyzed by numerical simulation. The results show that the joint control scheme can not only control floor heave effectively, but also decrease the roof subsidence deformation and roadway walls convergence, and reduce the surrounding rock mass plastic zone extension. The field monitoring data are consistent with the simulation resuhs, which proves that this scheme can get good control effect.
出处
《煤矿安全》
北大核心
2017年第9期62-65,共4页
Safety in Coal Mines
关键词
弱胶结软岩
泥砂岩互层
底鼓机理
联合控制
数值模拟
weakly consolidated soft rock
mud-sand stone interbedding
floor heave mechanism
joint control
numerical simulation
