充填步距对地表移动变形特征的控制影响  

The control impact of filling pace on surface movement and deformation characteristics

作　　者：贾林刚 张华兴[3] 刘鹏亮[3] JIA Lingang;ZHANG Huaxing;LIU Pengliang(CCTEG Ecological Environment Technology Co.,Ltd.,Beijing 100013,China;Ecological Technology Department,Tiandi Science&Technology Co.,Ld.,Beiing 100013,China;Coal Mining&Designing Department,Tiandi Science&Technology Co.,Ltd.,Beijing 100013,China)

机构地区：[1]中煤科工生态环境科技有限公司,北京100013 [2]天地科技股份有限公司生态科技事业部,北京100013 [3]天地科技股份有限公司开采设计事业部,北京100013

出　　处：《中国矿业大学学报》2022年第4期642-650,共9页Journal of China University of Mining & Technology

基　　金：北京市科技计划项目(Z181100005118012);中国煤炭科工集团有限公司重点项目(2018-2-ZD007)。

摘　　要：为了研究充填开采步距对覆岩移动及地表建筑物变形的影响,首先,采用弹性地基梁理论,建立了顶板的位移方程,并采用力学等效转换,推导得出了顶板最大跨距、控顶距与充填步距间的数学关系式,进而得到充填步距的理论计算公式;其次,根据地表建筑物的特性及对变形形式的敏感分析,得到建筑物的抗变形限值,并进一步计算得出地表沉陷的最大允许值,反算出顶板位移值,按照推导公式计算分析,得出顶板跨距及相应的充填步距.从而建立了充填步距与地表建筑物变形之间的相互关系,通过调整充填步距,达到控制顶板位移和地表沉陷以及保护建筑物的目的.通过实例应用分析,在设定地表水平变形为1 mm/m的变形限值时,得出充填步距为6.4 m,当井下充填步距设为该值时,实测地表下沉为237 mm,且水平变形值小于预设限值,达到了良好地控制地表移动变形及保护地面建筑物的效果.In order to study the influence of filling pace on overburden movement and surface building deformation, the displacement equation of roof was primarily established based on the theory of elastic foundation beam, by means of mechanical equivalent transformation, the mathematical relationship between the maximum span of roof and the control roof distance and the filling pace was derived, then the theoretical calculation formula of filling pace was obtained. Secondly, according to the characteristics of surface buildings and the sensitive analysis of deformation forms, the limit value of anti-deformation of buildings can be obtained, and the maximum allowable value of surface subsidence can be further calculated, and the displacement value of roof can be inversed. Through the calculation and analysis basis the deduced formulas, the roof span and appropriate filling pace were obtained. Thus, the relationship between the filling space and the deformation of surface buildings was established. By adjusting the filling pace, the purpose of controlling roof displacement and surface subsidence and protecting buildings were achieved. Through the application analysis of an example, when the horizontal deformation of the surface is set to 1 mm/m, the filling step distance is 6.4 m. When the underground filling step distance is set to this value, the measured surface subsidence is 237 mm, and the horizontal deformation value is less than the preset limit, which can achieve ideal results in controlling ground movement and deformation and protecting buildings.

关 键 词：充填开采 充填步距 地表变形 沉陷控制 顶板移动 

分 类 号：TD325[矿业工程—矿井建设]