深部开采水平应力场与地表远区移动分析  

ANALYSIS OF HORIZONTAL STRESS FIELD AND FAR FIELD MOVEMENTS DUE TO DEEP MINING

作　　者：李文秀[1] 孟庆立[1] 闻磊[1] 刘晓敏[1] 刘琳[1] 

机构地区：[1]河北大学建筑工程学院,河北保定071002

出　　处：《岩石力学与工程学报》2010年第A01期2630-2636,共7页Chinese Journal of Rock Mechanics and Engineering

基　　金：河北省科技攻关项目(072156142);河北省教育厅科研项目(2007415)

摘　　要：官庄铁矿是我国东部地下矿之一,埋深500～1000m,采用无底柱分段崩落法回采。通过应力测量得知,矿区最大水平应力为垂直应力的1.14倍。针对北采区510～550m水平开采引起的远区水平移动问题,在大量实测资料分析基础上,采用数值方法和随机介质理论对水平移动进行预测,同时对实测水平移动进行分析。通过分析发现,距当前采区边界500m处的水平移动达到50mm,而此处并未观测到垂直移动。分析结果表明,由于存在较高的水平应力,导致水平移动较大,而这种现象就是由于官庄铁矿区砂岩和泥岩地层中所存在的高水平应力场引起的。Guanzhuang iron mine is one of a number of underground iron mines in the Eastem China, which is at depths of 500 - 1000 m using the pillarless sublevel caving method. Stress measurements confirmed that, in Guanzhuang iron mine, the magnitude of the maximum horizontal stresses is typically 1.14 times greater than that of vertical stresses. The north mining area is at depths of 510 -550 m, and movements are being measured 500 m or more far away from an active sublevel. Horizontal displacement figure shows one example of these measured movements and it can be seen that, in this case, lateral movements of about 50 mm were measured about 500 m away from a sublevel panel being extracted at a depth of about 510 m. There are no measurable vertical movements at this distance. Horizontal displacements due to underground mining are analysed by using the stochastic medium and numerical method. These lateral displacements have been termed as far field movements. It has become apparent that the far-field movements are due to redistribution of the high horizontal stress field in the sandstones and siltstones that overlie the Guanzhuang iron-seams.

关 键 词：采矿工程 深部开采 水平应力 远区水平移动 

分 类 号：TD32[矿业工程—矿井建设]