CAJ | 학술논문

利用FLAC3D数值分析软件，分析了高潜水的张集煤矿巨厚松散层下12171工作面重复开采对上部17278工作面移动变形区的走向位移、垂直应力分布和塑性破坏区的影响。分析结果表明：数值模拟结果与实测数据基本相符；多煤层重复采动地表下沉具有特殊性，下沉量相比于初次采动是逐渐增大的，随着重复采动次数的增加，下沉量逐渐趋于稳定；同时随着工作面累计推进距离的增加，地面沉陷范围逐渐增加，并形成塌陷盆地；两工作面顶板围岩以剪切破坏为主，局部发生拉伸破坏。
이용FLAC3D수치분석연건，분석료고잠수적장집매광거후송산층하12171공작면중복개채대상부17278공작면이동변형구적주향위이、수직응력분포화소성파배구적영향。분석결과표명：수치모의결과여실측수거기본상부；다매층중복채동지표하침구유특수성，하침량상비우초차채동시축점증대적，수착중복채동차수적증가，하침량축점추우은정；동시수착공작면루계추진거리적증가，지면침함범위축점증가，병형성탑함분지；량공작면정판위암이전절파배위주，국부발생랍신파배。
The FLAC3D numerical analysis software is adopted to analyze the influence of the displacement ,vertical stress distribution and plastic failure zone on strike of the upper 17278 w orking surface movement and deformation area by 12171 w orking surface repeat mining under the Zhangji coal mine thick unconsolidated layers with high diving .The results show that the numerical simulation results are basically consistent with the observed data .The repeat mining subsidence of multiple coal seams has particularity ,and the sinking quantity is gradually increasing compared with the initial mining ,with the increase of the number of repeat mining , the subsidence tends to be stable . Meanwhile ,the range of the ground subsidence gradually increases with the increase of the working surface ,and the subsidence basin is formed . The surrounding rock on two working surface roof always due to the shear failure ,the tensile failure is happened in local .