基于远场周期来压的地表动态下沉预计  

Surface dynamic subsidence prediction based on far-field periodic weighting

作　　者：樊克松[1,2,3] 申宝宏 黄志增[1,2] 潘黎明[1,2] 薛吉胜[1,2] 赵铁林[1,2] FAN Kesong;SHEN Baohong;HUANG Zhizeng;PAN Liming;XUE Jisheng;ZHAO Tielin(Coal Mining Research Branch,China Coal Research Institute,Beijing 100013,China;Coal Mining&Designing Department,Tiandi Science&Technology Co Ltd,Beijing 100013,China;College of Electronic and Electrical Engineering,Henan Normal University,Xinxiang,Henan 453007,China;China Coal Research Institute,Beijing 100013,China)

机构地区：[1]煤炭科学研究总院开采研究分院,北京100013 [2]天地科技股份有限公司开采设计事业部,北京100013 [3]河南师范大学电子电气工程学院,河南新乡453007 [4]煤炭科学研究总院,北京100013

出　　处：《采矿与安全工程学报》2019年第6期1213-1221,1227,共10页Journal of Mining & Safety Engineering

基　　金：国家重点研发计划项目(2018YFC0604501);国家自然科学基金项目(51504135)

摘　　要：针对以往时间函数模型在预测特厚煤层综放开采深厚比较小时地表动态下沉偏差较大的问题,论文以大同矿区芦子沟煤矿3108综放工作面为工程背景,采用现场实测与理论分析的方法将工作面矿压显现与地表变形两者结合起来研究,提出了依据远场周期来压预测地表下沉的动态过程。研究表明:特厚煤层综放采场会有规律地发生大步距周期性强矿压显现,地表点的下沉速度曲线随工作面周期性强矿压发生有规律性的波动,高位主关键层失稳使得工作面周期强矿压与地表动态下沉之间密切相关,工作面的周期强矿压会在地表变形中显现出来。据此基于远场周期来压建立了修正的分段建模的Weibull时间函数模型,该模型对于工作面各个位置地表点的动态下沉均具有较好的适应性,实例计算结果表明修正的分段Weibull时间函数模型具有较高的精度,能够更好地用于描述地表点动态沉降变形过程。To solve the problem of bigger deviation of the surface subsidence when previous time function model is used to predict surface subsidence under the condition of fully mechanized caving of extra-thick coal seam and smaller ratio of depth to thickness, with full-mechanized caving mining face 3108 of Luzigou coal mine in Datong mine area as engineering background, the method of field measurement and theoretical analysis has been adopted to study the working face pressure and the deformation, and prediction of surface dynamic subsidence based on stope periodic weighting has been put forward. The results have shown that the long-step periodic strong strata behaviors occur regularly in fully mechanized caving of extra-thick coal seam, and surface subsidence velocity curve varies regularly accompanied by working face periodic strong weighting. Instability of upper main key stratum makes the working face periodic strong weighting the intimate reason that causes surface dynamic subsidence, with working face periodic strong weighting in the surface deformation. As a result, segmented amendatory time function model of Weibull based on far-field periodic weighting theory has been built. This model may better adapt to surface dynamic subsidence at every point on the working face. The calculation shows that the model possesses higher accuracy, which contributes to the monitoring of the surface dynamic subsidence deformation process.

关 键 词：特厚煤层开采 高位主关键层 周期强矿压 动态下沉预计 修正时间函数模型 

分 类 号：TD325[矿业工程—矿井建设]