摘要
为实现综放工作面安全推过陷落柱,根据中煤平朔公司井工一矿实际条件进行数值模拟计算,通过监测布置在计算模型上测线的垂直应力值,根据其应力变化特点,将综放工作面推过陷落柱的整个过程划分为6个阶段,即应力正常阶段、应力一般升高阶段、应力异常升高阶段、应力降低阶段、应力二次升高阶段和应力恢复正常阶段。并在砌体梁理论的基础上分析了6个阶段的采场覆岩结构及其力学特性,提出了各阶段相应的支护措施。
In this paper, to ensure that a fully mechanized caving face can pass collapse column safely and efficiently, numerical simulation was carried out based on the real mining and geological conditions of No.1 coal mine in Pingshuo coal industry company. Meanwhile, survey lines were arranged to monitor the vertical stress values. The results show that the whole process during fully mechanized caving face passing the collapse column can be divided into six stages according to the vertical stress variation, that is, normal stress stage, stress smooth increasing stage, stress abnormal increasing stage, stress decreasing stage, stress secondary increasing stage, and normal stress recovering stage. Meanwhile, based on the voussoir beam theory, the roof structure characteristics and mechanical properties of the six stages were analyzed, and the roof-supporting measures were proposed correspondingly.
出处
《采矿与安全工程学报》
EI
CSCD
北大核心
2015年第1期49-53,共5页
Journal of Mining & Safety Engineering
基金
国家自然科学基金项目(51404105)
中央高校基本科研业务费项目(3142013100)
华北科技学院基金项目(JWC2013B03)
关键词
综放工作面
陷落柱
阶段划分
顶板结构
fully mechanized caving face
collapse column
stage division
roof structure
