富水顶板大变形破坏特征及分区动态支护技术研究  

Study on large deformation and failure characteristics of water-rich roof and zoning dynamic support technology

作　　者：任建慧 杨森 李宣良 姚士茂 宋小飞 刘耀辉 REN Jianhui;YANG Sen;LI Xuanliang;YAO Shimao;SONG Xiaofei;LIU Yaohui(CHN Energy Shendong Coal Group Co.,Ltd.,Shenmu 719315,China;CCTEG Xi’an Research Institute(Group)Co.,Ltd.,Xi’an 710077,China)

机构地区：[1]国家能源集团神东煤炭集团公司,陕西神木719315 [2]中煤科工西安研究院(集团)有限公司,陕西西安710077

出　　处：《中国矿业》2023年第11期152-159,共8页China Mining Magazine

摘　　要：富水顶板对回采巷道开挖及服务期间均具有较强影响,巷道顶板吸水或失水过程都将弱化其完整性,造成巷道发生大变形,影响工作面安全高效生产。以布尔台煤矿22204工作面为研究对象,采用理论分析、现场探测、数值模拟综合研究方法明确了不同区段巷道塑性区分布特征,认为无支护条件下含水区段塑性区发育范围约为5 m,明显大于正常区段塑性区范围2 m,且塑性区均呈明显非对称分布形态,同时提高支护强度可显著控制含水巷道塑性区半径。在此基础上提出了对顶板富水区段巷道进行“锚索+钢带”补强支护的分区动态支护方案,并进行了工业性实践,围岩控制效果显著。The water-rich roof has a strong impact on mining roadway excavation and service period.The water absorption or loss process of roadway roof will weaken its integrity,causing large deformation of roadway and affecting the safe and efficient production of working face.Taking the 22204 working face of Buertai Coal Mine as the research object,defines the distribution characteristics of the plastic zone in different sections of roadway by using the comprehensive research methods of theoretical analysis,field detection and numerical simulation.It is believed that the plastic zone in water bearing section is about 5 m under the condition of no support,which is obviously 2 m larger than the plastic zone in the normal section,and the plastic zones are obviously asymmetric.At the same time,increasing the support strength can significantly control the plastic zone radius of water bearing roadway.On this basis,the zoning dynamic support scheme of“anchor cable+steel belt”reinforcement support for roadway in roof water-rich section is proposed and industrial practice is carried out,and the surrounding rock control effect is remarkable.

关 键 词：富水顶板 塑性区分布形态 矿压显现特征 分区动态支护技术 工业性实践 

分 类 号：TD353[矿业工程—矿井建设]