房柱式采煤采空区下采场动载矿压机理研究  

Study on Dynamic Load Ore Pressure Mechanism of Room and Pillar Mining under Goaf

作　　者：杨宏飞 高超[2,3] 尹家宽 杨云 YANG Hongfei;GAO Chao;YIN Jiakuan;YANG Yun(Qinglongsi Coal Mine,Yulin Energy Co.,Ltd.,National Energy Investment Group Co.,Ltd.,Yulin 719000,China;Mining Design Division of Tiandi Technology Co.,Ltd.,Beijing 100013,China;Mining Research Branch,Coal Research Institute,Beijing 100013,China)

机构地区：[1]国家能源集团国能榆林能源公司青龙寺煤矿,陕西榆林719000 [2]天地科技股份有限公司开采设计事业部,北京100013 [3]煤炭科学研究总院开采研究分院,北京100013

出　　处：《煤炭技术》2024年第6期52-55,共4页Coal Technology

基　　金：国家自然科学基金青年科学基金项目(U1504529)。

摘　　要：为解决31201工作面上覆房柱式采煤采空区集中煤柱受到破坏形成动载矿压易导致下部工作面发生顶板事故的难题,对工作面地质条件及顶部采空区集中煤柱对下部工作面回采产生的影响进行分析,分析工作面过应力集中区支架循环末阻力云图可知:31201工作面矿压显现为通过集中煤柱后大范围来压>2-2煤房采低回收率区>杨树洼上坡区>其他区域。对工作面顶板动载矿压进行FLAC^(3D)数值模拟,通过模拟结果可知:诱发大面积强动载矿压原因是集中煤柱的突然破坏,上覆岩层顶板垮落及工作面自身顶板切落,使顶板载荷完全作用在支架上,造成液压支架压架事故。通过动载矿压发生机理,提出有针对性的应对措施,为后续安全回采提供依据。In order to solve the problem that the roof accident of the lower working face is easy to occur due to the failure of the concentrated coal pillar in the goaf of 31201 working face,the influence of the geological conditions of the working face and the concentrated coal pillar in the top goaf on the mining of the lower working face is analyzed,and the final resistance cloud diagram of the support circulation in the over-stress concentration area of the working face is analyzed.The ore pressure in 31201 working face appears by concentrating coal pillar in a wide range of pressure>2-2 Low recovery area of coal house>upper slope area of Yangshuwa跃other areas.The FLAC^(3D)numerical simulation is carried out on the dynamic load ore pressure of working face roof.Through the simulation results,it can be seen that the cause of inducing large area of dynamic load ore pressure is the sudden failure of concentrated coal pillar,the overlying strata roof span and the working face's own roof cut off,so that the roof load fully acts on the support,resulting in the hydraulic support pressure accident.Based on the mechanism of dynamic load ore pressure,the corresponding countermeasures are put forward to provide basis for subsequent safe mining.

关 键 词：房柱式采煤 矿压显现 数值模拟 动载矿压 形成机理 

分 类 号：TD323[矿业工程—矿井建设]