充填工作面采空区顶板活动规律研究  

Study on the roof movement rule of goaf in filling mining working face

作　　者：赵琪 李洋 尹志辉 秦洪岩 Zhao Qi;Li Yang;Yin Zhihui;Qin Hongyan(Xima Mine of Shenyang Coking Coal Co.,Ltd.,Liaoyang 111000,China;North China University of Science&Technology,Beijing 101601,China)

机构地区：[1]沈阳焦煤股份有限公司西马煤矿,辽宁辽阳111000 [2]华北科技学院,北京101601

出　　处：《煤炭与化工》2021年第1期30-34,50,共6页Coal and Chemical Industry

摘　　要：为分析充填工作面采空区顶板活动规律,采用理论分析和现场实测相结合的方法进行研究。首先采用板壳理论分析充填开采顶板坚硬岩层的破断过程,得到充填工作面采空区顶板破断并非逐层渐进式的破断,而是以坚硬岩层及其控制的岩层组为一整体破断,当岩层组破断时在采空区顶板活动中会出现顶板大范围突然沉降。设计充填工作面采空区顶板活动规律监测方案,监测数据显示:顶板下沉最终稳定状态时下沉量约361.8 mm,与等效采高399 mm很接近;工作面后方22 m顶板沉降非常缓慢,采空区顶板活动趋于稳定;采空区顶板开采过程中会出现突然沉降的现象,突然沉降发生时工作面距离上次发生来压位置推进距离约17.6 m,说明工作面每推进17.6 m会出现一次严重的覆岩断裂现象。实测结果和理论分析的结论高度吻合,二者相互验证。In order to analyze the roof movement rule of goaf in filling working face,the method of theoretical analysis and field test was proposed.The plates and shells theory was used to analyze the breaking process of roof hard rock in filling mining,which was not a progressive failure layer by layer,but a whole failure of hard rock and its controlled rock group.When the rock formation broke,the roof would suddenly settle in a wide range during the goaf roof activity.Monitoring scheme of goaf roof activity rules in filling working face was designed,the monitoring data showed that when the roof sank in the final stable state,the subsidence amount was about 361.8 mm,which was close to the equivalent mining height of 399 mm.The settlement of 22 m roof behind the working face was very slow,and the goaf roof activity tended to be stable.Sudden settlement would occur in the process of goaf roof mining,when it occurred,the advance distance of working face from the last pressure position was about 17.6 m,indicating that a serious overburden fracture would occur every 17.6 m advancement of the working face.The measured results were highly consistent with the theoretical analysis,and verified each other.

关 键 词：充填工作面 采空区顶板 顶板活动规律 矿山压力 

分 类 号：TD327[矿业工程—矿井建设]