深埋地下工程开采与支护稳定的数值分析  

The numerical analysis of deep underground mining engineering and supporting stable

作　　者：马茜濛 李世海[2] 吕祥锋[2] 

机构地区：[1]石家庄铁道大学土木工程学院,河北石家庄050043 [2]中国科学院力学研究所,北京100190

出　　处：《中国地质灾害与防治学报》2014年第1期51-56,共6页The Chinese Journal of Geological Hazard and Control

基　　金：国家重点基础研究发展规划(973计划)项目(2010CB731506)

摘　　要：深埋地下工程开采使得覆岩变形和应力重新分布,而支护作用对采动有很大影响,使得深埋地下工程采动效应更加明显,加大了开采与支护稳定的难度。采用数值模拟方法,实现回采工作面超前支护随采随移架过程,研究深埋地下工程开采过程及其对回采工作面超前支护稳定的影响,数值计算结果表明,工作面中心位置和巷道与煤层交界处变形集中较明显,同时工作面底面有向上隆起趋势;巷道边帮水平应力呈现逐渐增加趋势,最大水平应力值约为30MPa;巷道顶板测点应力呈现"增大→减小→再增加"过程,顶板最大下沉量约为12cm;工作面超前段支架最大受力约为300kN,为额定工作阻力的1.2倍;覆岩应力呈现出增加后迅速减小,下沉变形量增加,整体变形量最大值约为16cm,研究结果为深埋地下工程开采安全和支护稳定提供了重要依据。Deep underground mining makes overburden deformation and stress redistribution, while supporting effectg has a great influence on the mining that make the deep underground mining effect is more obvious and increased those difficulty of mining and supporting stability. By numerical simulation to study the process and its deep undergrounc^rg~ mining coal face advance support for stabilizing influence, while the bottom face has bulge upward trend the numericallm, results show that the face center position and roadway deformation is focused at the junction with the coal seam i.,se~ obvious. The edges of roadway horizontal stress showed a gradual upward trend, maximum horizontal stress value oival approximately 30MPa; The stress of roadway roof measuring point showed an ＂increase to decrease to additionaldi increase ＂ procedure while roof maximum subsidence of about 12cm. About 300kN force of the stent＇s maximum ormu advanced working face is 1.2 times for the rated working resistance; The stress of overburden showing decreasesecr rapidly after increase while the sinking deformation increases, the overall maximum amount of deformation is aboulis 16cm, with all of above the deep underground engineering research results provides an important basis of deel：of underground mining engineering and supporting stable.

关 键 词：深埋 地下工程 开采安全 支护稳定 数值计算 

分 类 号：TD335[矿业工程—矿井建设]