采动覆岩离层的数值模拟研究  

NUMERICAL SIMULATION ON MINING INDUCED BED SEPARATION OF OVERLYING STRATA

作　　者：赵德深[1] 陈雄[1] 覃丽坤[1] 徐涛[1] 关萍[1] 

机构地区：[1]大连大学建筑工程学院,辽宁大连116622

出　　处：《岩石力学与工程学报》2005年第A01期5164-5167,共4页Chinese Journal of Rock Mechanics and Engineering

基　　金：辽宁省科技基金项目（20022106）;辽宁省教育厅基金项目（2023901022）

摘　　要：采动覆岩移动及其导致的离层分布是一个受多种因素影响的极其复杂的问题，具有极强的不可视、不可触等特点，因此，理论分析和现场观测都是十分困难的。对矿区采动覆岩的破坏过程进行了数值模拟仿真研究，重点分析了覆岩中离层的发展高度变化规律、离层区域范围的确定以及煤层采出厚度的影响作用等。数值模拟再现了采动覆岩运移及离层产生的全过程，揭示了离层高度与工作面推进距离、离层区域发生范围和煤层开采厚度之间的关系。数值模拟结果确定了覆岩离层产生的位置、离层大小等，从而为采用离层充填注浆控制地表沉陷等提供了重要的理论基础和依据。It is very difficult for theoretical analysis and field observation since the movement and bed separation characteristics of overburden strata above mine voids induced by underground mining is a very complicated problem, which influenced by many factors, and the deformation and movement of overlying strata are not visible and touchable. In this paper, the movement and failure process of strata induced by underground mining are numerically simulated by using the rock failure process analysis code（RFPA2D） to investigate the height of bed separation development, the location of the bed separation zone and the effect of the extracted thickness of the coal seam on the development height of bed separation. Numerical simulations demonstrate the whole process of mining induced strata movement and the characteristics of bed separation, furthermore, the relationship between the height of bed separation and the advance distance of coalface, the effect of the extracted thickness of the coal seam on the development height of bed separation are indicated. Numerical results offer important theoretical basis and reliable evidence for the determination of the location and scale of the bed separation zone wide application of the technique of grouting into the separated strata to control the surface subsidence.

关 键 词：采矿工程 数值模拟 离层 分布规律 覆岩 

分 类 号：TD325.4[矿业工程—矿井建设]