大倾角煤层开采后地表残余移动变形三维数学模型  

Three-Dimensional Mathematical Model of Surface Residual Movement and Deformation after Mining of Large Inclined Coal Seam

作　　者：朱广轶[1,2] 刘伟伟 朱君安 杨广宁 郭影[1] ZHU Guangyi;LIU Weiwei;ZHU Jun'an;YANG Guangning;GUO Ying(School of Architecture and Engineering, Shenyang University, Shenyang 110044, China;School of Architecture and Engineering, Shenyang City University, Shenyang 110112, China;Rural Highway Management Section in Kazuo County, Chaoyang 122300, China)

机构地区：[1]沈阳大学建筑工程学院,辽宁沈阳110044 [2]沈阳城市学院建筑工程学院,辽宁沈阳110112 [3]喀左县农村公路管理段,辽宁朝阳122300

出　　处：《沈阳大学学报（自然科学版）》2021年第5期409-417,共9页Journal of Shenyang University：Natural Science

基　　金：国家重点科技攻关项目(96-223-01-03-04);辽宁省自然科学基金资助项目(20170540651).

摘　　要：为研究开采大倾角煤层后老采区地表残余移动变形规律,对其覆岩移动变形机理进行了分析.发现开采后,煤层顶板岩石冒落到采空区,并在与底板平行的自重力分量作用下,沿煤层底板向下山方向滚动,使采空区下边界的空洞逐渐被填充、密实,达到新的平衡,造成采空区下边界煤层顶板岩石冒落减少.而在采空区上边界,由于顶板岩石的冒落和流失而变大,促进了顶板的进一步冒落.除了沿岩层顶板法线方向的破坏外,采空区上边界的岩层破坏宽度也显著增大.基于非连续介质模型和等影响原理,创立了大倾角煤层开采后地表残余移动变形三维数学模型,应用VB编写残余移动变形预测模块,将模块加入ZMS2021软件,绘制了残余移动变形三维曲面和二维曲线.将程序预测结果与实际观测结果对比的结果表明,大倾角煤层开采后地表残余移动变形三维数学模型与实际观测的误差在允许范围内,各数学模型能够定量描述大倾角煤层开采后地表残余移动变形规律.In order to study the law of surface residual movement and deformation in old mining area after mining large inclined coal seam,the movement and deformation mechanism of overlying rock was analyzed firstly.It is found that after mining,the roof rock of coal seam falls into the goaf,and under the action of self gravity component parallel to the floor,it rolls downward along the coal seam floor,so that the cavity at the lower boundary of the goaf is gradually filled and compacted.On the other hand,on the upper boundary of the goaf,the roof rock fall becomes larger due to the fall and loss of the roof rock,which promotes the further fall of the roof.In addition to the damage along the normal direction of the roof,the width of the rock failure on the upper boundary of the goaf also increases significantly.A three-dimensional mathematical model of surface residual movement and deformation after mining of large dip coal seam was established.The prediction module of residual movement and deformation was compiled by VB.The module was added into ZMS2021 software,and the three-dimensional surface and two-dimensional curve of residual movement and deformation were drawn.The results show that the error between the three-dimensional mathematical model and the actual observation is within the allowable range,and each mathematical model can quantitatively describe the law of surface residual movement and deformation after mining of large dip coal seam.

关 键 词：大倾角煤层 老采区 地表残余移动变形 机理 三维数学模型 

分 类 号：TD325[矿业工程—矿井建设]