厚煤层开采上覆岩层移动与应力分布特征研究  

Research on Movement and Stress Distribution Characteristics of Overlying Strata in Thick Coal Seam Mining

作　　者：张建 亓佳利 李长青 Zhang Jian;Qi Jiali;Li Changqing(Shandong Energy Group Luxi Mining Industry Co.,Ltd.,Shandong Heze 274000)

机构地区：[1]山东能源集团鲁西矿业有限公司,山东菏泽274000

出　　处：《山东煤炭科技》2024年第6期139-143,154,共6页Shandong Coal Science and Technology

摘　　要：厚层顶板的垮落常对综放工作面前方的煤岩体造成冲击,为防治厚煤层开采引发的冲击地压灾害,了解工作面开采的安全稳定性,利用FLAC^(3D)建立了李楼煤矿1301工作面三维采动模型,获得了随工作面推进覆岩移动与应力分布特征,理论计算了厚表土地层侧向支承压力,对回采面整体的安全性进行分析。结果表明:采空区上覆岩层的运动随工作面的推进逐步向上发展,当工作面推采至400 m时,上覆岩层运动高度达到最大;工作面超前支承压力的影响范围和应力的集中程度随工作面的推采逐渐增加,当工作面推采至工作面见方时,超前支承压力的应力达到60 MPa,应力的峰值距工作面的距离约为70 m。The collapse of the thick roof often causes an impact on the coal rock mass in front of the fully mechanized caving face.In order to prevent and control the rock burst disaster caused by thick coal seam mining and understand the safety and stability of the working face mining,a 3D mining model of the 1301 working face of Lilou Coal Mine is established using FLAC^(3D).The characteristics of overlying rock movement and stress distribution as the working face advances are obtained,and the lateral support pressure of the thick surface soil layer is theoretically calculated to analyze the overall safety of the stoping face.The results show that the movement of the overlying strata in the goaf gradually develops upwards with the advancement of the working face.When the working face is pushed to 400 m,the height of the movement of the overlying strata reaches its maximum;the influence range and stress concentration degree of the advanced support pressure of the working face gradually increase with the pushing and mining of the working face.When the working face is pushed and mined to the square,the stress of the advanced support pressure reaches 60 MPa,and the stress peak is about 70 m away from the working face.

关 键 词：厚煤层 覆岩 移动 应力 分布 

分 类 号：TD323[矿业工程—矿井建设]