近距离膏体充填工作面采场底板应力分布与破坏规律研究  

Study on stress distribution and failure law of stope floor in short-distance and paste-filling face

作　　者：毕智强 孙丽丽 BI Zhi-qiang;SUN Li-li(Shandong Kangge Energy Technology Co.,Ltd.,Jining 272000,China;Yanzhou Coal Mining Company Limited,Yanzhou 273500,China)

机构地区：[1]山东康格能源科技有限公司,山东济宁272000 [2]兖州煤业股份有限公司,山东兖州273500

出　　处：《煤炭科技》2021年第2期158-162,共5页Coal Science & Technology Magazine

摘　　要：针对岱庄煤矿6351膏体充填工作面工程条件,工作面底板距下伏8300胶带大巷仅有20.32 m,为保证矿山安全生产,采用数值模拟及现场实测等方法探究充填开采后底板的破坏发育特点,获取最大的底板破坏深度,为8300胶带大巷的稳定性分析奠定基础。结果表明:随着6351工作面的推进,采用充填开采后,底板裂隙贯穿带较小,6351工作面底板破坏产生的裂隙很难影响下伏8300胶带大巷。认为采用膏体充填采煤是合适的,并且其影响底板裂缝带主要受充填体强度和开采范围的影响。In view of the engineering conditions of the 6351 paste filling working face in Daizhuang Coal Mine,the working face floor is only 20.32 m away from the underlying 8300 belt roadway.In order to ensure the safe production of the mine,numerical simulation and field measurement were used to explore the failure of the floor after filling mining features,to obtain the maximum floor failure depth,and lay the foundation for the stability analysis of the 8300 belt roadway.The results showed that with the advancement of the 6351 working face,after filling mining was adopted,the penetration zone of the floor cracks was smaller,and the cracks caused by the failure of the floor of the 6351 working face could hardly affect the underlying 8300 belt roadway.It was believed that the use of paste filling for coal mining was appropriate,and its influence on the fracture zone of the floor was mainly affected by the strength of the filling body and the mining range.

关 键 词：数值模拟 膏体充填 底板破坏 

分 类 号：TD322[矿业工程—矿井建设]