离层注浆条件下覆岩变形破坏特征的连续探测  

Continuous exploration for deformation and failure of overburdens under injecting grouts in separate layers

作　　者：王忠昶[1] 张文泉[2] 赵德深[1] 

机构地区：[1]大连大学建筑工程学院,辽宁大连116622 [2]山东科技大学资源与环境工程学院,山东青岛266510

出　　处：《岩土工程学报》2008年第7期1094-1098,共5页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金资助项目(50574016)

摘　　要：覆岩破坏的发育高度及其分布形态是合理确定开采边界及留设防水煤岩柱的基础。为了探讨覆岩离层注浆条件对导水裂隙带形态的影响,采用前端泄露式多回路注(放)水系统,应用井下仰孔分段注水法对东滩煤矿14308工作面覆岩离层带实施注浆充填条件下综采放顶煤导水裂隙带的破坏特征进行了连续探测。探测结果表明:厚煤层综采放顶煤条件下覆岩离层带注浆时的覆岩采动导水裂隙带高度略高于正常条件下的覆岩采动导水裂隙带高度,走向方向的采动导水裂隙带高度低于倾向方向的采动导水裂隙带高度;离层带注浆时的覆岩破坏形态和范围向工作面外侧突出较大。The height of development and its morphology of distrbution for the water flowing fractured zone was the basis of reasonable confirmation of the mining boundary and remaining water barrier. In order to discuss the effect of overburdens under injecting grouts in separate layers on the morphology of the water flowing fractured zone, continuous exploration for failure characteristics of the overburden of working face 14308 of Dongtan Coal Mine under injecting grouts in separate layers and fully mechanized sub-level caving condition was processed by the method of underground uphole water injection technology by intervals with bore-head leaking multi-loops affusion （discharge） system. It was shown that the height of the water flowing fractured zone under injecting grouts in separate layers condition was slightly higher than that under normal condition, and the height was lower along the strike of the coal seam than that along the tendency of the coal seam. Its range had the larger outstand to outboard working face under the condition of injecting grouts in separate layers.

关 键 词：离层注浆 仰孔分段注水 导水裂隙带 连续探测 

分 类 号：TD325.2[矿业工程—矿井建设]