浅埋煤层中的关键层运动与导水裂隙发展  

The movement of key strata and the development of crack in shallow seam

作　　者：张杰[1] 

机构地区：[1]西安科技大学能源学院,陕西西安710054

出　　处：《湖南科技大学学报（自然科学版）》2010年第4期25-28,共4页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：国家自然科学基金资助(50074023);陕西省教育厅基金资助(09JK599);西安科技大学博士基金资助(200801)

摘　　要：对2种不同赋存条件下的浅埋煤层工作面进行了流固耦合相似模拟实验,实验研究表明,主关键层下岩层的运动破坏规律是下位逐层垮落而上位整体运动.影响浅埋煤层导水裂隙发展的主要因素是主关键层层位和采高,主关键层位与采高之比越大,越容易进入弯曲下沉带,当其层位距离煤层顶板的高度与采高满足kc≥11时,主关键层进入弯曲下沉带,也就是裂隙带与采高之比k≥12时,裂隙才可能停止发展.并且随着工作面的推进,围岩的渗流状况由原生裂隙逐渐向变形裂隙和导水裂隙过渡.Two kinds of liquid-solid-coupling simulation study were completed in difference condition in shallow seam.The simulation study indicates that the law of stratum below main key strata is the low stratum caves in turn and the high strata cave as a whole.The key factor which influences the development of water seepage crack is the location of the main key strata and the mining height.The main key strata is more easy go into bending sinking belt if the ration of the main key strata location and the mining height is more bigger,the main key strata will go into bending sinking belt when the ration meets kc≥11,or the crack will stop development when the ration of crack belt and mining height meets kc≥12.At the same time,the primary crack gradually change into bending deflection crack and breaking water seepage crack in it＇s seepage condition.

关 键 词：浅埋煤层 主关键层层位 导水裂隙 流固耦合模拟 

分 类 号：TD31[矿业工程—矿井建设]