充填率对覆岩沉降及工作面超前支承应力影响研究  

The Impact Study of Filling Ratio to Overlying Srata Advance Stress Working Face

作　　者：牛福宝 赵庆东[1] 钟旭[1] 孙洪浩[1] 张臣 

机构地区：[1]山东能源新汶矿业集团翟镇煤矿,山东泰安271200 [2]山东科技大学矿业与安全工程学院,山东青岛266590

出　　处：《煤》2017年第11期1-3,共3页Coal

基　　金：国家自然科学基金青年基金项目(51504145)

摘　　要：采用FLAC^(3D)数值软件建立了充填开采的数值模型,研究了不同充填率下覆岩沉降、顶板支承应力峰值和工作面超前支承应力的变化关系。研究表明,充填体有效降低了顶板的垮落高度,对围岩起到较好的支承作用,减小了覆岩沉降和矿压显现程度,且充填率越大,覆岩最大下沉量、基本顶最大支承应力及超前支承应力越小,但当充填率超过80%时,减小的幅度明显降低,各变化曲线趋于平缓。Using FLAC^3D numerical software numerical model of filling mining strata subsidence under different filling rate,and working face roof bearing stress peak abutment stress changes in the relationship. Research has shown that filling body effectively reduces the roof caving height,to have a good supporting effect of surrounding rock,reduced the degree of strata subsidence and rock pressure,and the filling rate,the greater the strata bearing stress of the maximum subsidence,roof and the abutment stress is smaller,but when the filling rate of more than 80%,reduce the magnitude of the decrease,the curve flattens.

关 键 词：充填开采 超前支承压力 数值模拟 

分 类 号：TD323[矿业工程—矿井建设]