半胶结低强度覆岩破坏规律与切顶冒落预测  

Movement Rule And Cutting Top Caving Prediction In Semi-Cementation And Low Strength Overburden Rocks

作　　者：张莹莹[1] 魏久传[1] 谢道雷[1] 

机构地区：[1]山东科技大学地球科学与工程学院,山东青岛266590

出　　处：《山东煤炭科技》2015年第8期162-164,共3页Shandong Coal Science and Technology

基　　金：国家重点基础研究发展计划(973)资助项目(2012CB723104);国家自然科学基金资助(41372290;41402250);山东省自然科学基金资助(ZR2013EEQ019);(山东省矿山灾害预防控制国家重点实验室培育基地(山东科技大学)开放基金资助(MDPC2012KF13)

摘　　要：为确保伊犁一矿试采区安全回采及工作面顶板支护管理方式的正确选择,对其覆岩运动破坏规律进行研究。利用UDEC离散元软件进行煤层开挖数值模拟,分析煤层开挖过程中上覆岩层的运动破坏规律、顶板裂隙带高度发育规律,得出随裂隙带高度随工作面推进而增大,且当工作面推进一定距离时覆岩顶板出现台阶下沉和切顶冒落现象。研究成果为矿井顶板支护管理和安全生产提供了科学理论依据。To ensure that the safety mining and correct choice of roof support management of the test mining area of Yili NO.1 coal mine, studies the overlying strata movement and failure pattern. Using the UDEC discrete element software to carry on the numerical simulation of coal seam excavation, analyses the movement rule of overlying strata and height growth law of the roof fracture zone during the excavation process, and come to the conclusion that the height of fracture zone increases with the advancement of working face, and when the working face advancing a certain distance, overlying roof rock appears the phenomenon： step subsidence and cutting top caving. The research results provide a scientific theoretical basis for the management of roof nursing and security production of the coal mine.

关 键 词：覆岩运动规律 裂隙带高度 台阶下沉 切顶冒落 剪切破坏 

分 类 号：TD325[矿业工程—矿井建设]