巨厚松散层下综采工作面地表沉陷规律及其采厚效应  

Surface subsidence law and mining thickness effect of fully mechanized mining face under extremely thick loose layer

作　　者：李开鑫 柳昌涛 王昊楠 Li Kaixin;Liu Changtao;Wang Haonan(College of Geodesy and Geomatics,Shandong University of Science and Technology,Qingdao 266590,China;College of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东科技大学测绘科学与工程学院,山东青岛266590 [2]山东科技大学能源与矿业工程学院,山东青岛266590

出　　处：《矿山测量》2021年第5期22-26,共5页Mine Surveying

摘　　要：为了研究巨厚松散层开采条件下地表移动变形规律,文中根据彭庄煤矿地表移动观测站实测资料,分析了非充分采动条件下的地表移动变形情况,并借助于FLAC3D数值模拟软件,探讨了巨厚松散层开采条件下地表移动变形规律的采厚效应。研究结果表明:在非充分采动条件下,地表最大下沉值为609 mm,最大水平移动值为220 mm,超前影响角为57.17°,最大下沉速度为11 mm/d,最大下沉速度滞后角为75.62°;煤层开采厚度是影响地表移动变形的重要因素,随着开采厚度的增加,地表最大下沉值及水平移动值呈线性增大的趋势,并借助MATLAB数学软件回归分析拟合得到开采厚度与最大下沉值、下沉系数及水平移动值的函数表达式。In order to study the law of the surface movement and deformation law under the mining condition of the extremely thick loose layer,according to the measured data of the surface movement observation station in Pengzhuang Coal Mine,the surface movement and deformation under the condition of the insufficient mining was analyzed,and the mining thickness effect of the surface movement and deformation law under the mining condition of the extremely thick loose bed was discussed with the help of FLAC3D numerical simulation software.Results showed that the maximum surface subsidence value was 609 mm,the maximum horizontal movement value was 220 mm,the leading influence angle was 57.17 degrees,the maximum subsidence speed was 11 mm/d and the maximum subsidence speed lag angle was 75.62 degrees under the condition of the insufficient mining.Coal seam mining thickness was an important factor affecting the surface movement and deformation.With the increase of the mining thickness,the maximum subsidence value and the horizontal movement value of the surface showed the linear increase trend.Functional expressions of the mining thickness,the maximum subsidence value,the subsidence coefficient and the horizontal movement value were obtained by the regression analysis and fitting with MATLAB mathematical software.

关 键 词：巨厚松散层 地表下沉 采厚 数值模拟 

分 类 号：TD325[矿业工程—矿井建设]