组合支架切顶沿空留巷支架选型及影响因素研究  

Study on the Support Selection and Influence Factors of Cutting-roof Gob-side Entry Retaining with Combination Support

作　　者：郭玉 朱登兴[2] 于明旭 程强强[1] 王九红[3] GUO Yu;ZHU Dengxing;YU Mingxu;CHENG Qiangqiang;WANG Jiuhong(School of Architectural Construction,Jiangsu Vocational Institute of Architectural Technology,Xuzhou,Jiangsu 221116,China;China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;Yanzhou Coal Mining Company Limited,Yanzhou,Shandong 273500,China)

机构地区：[1]江苏建筑职业技术学院建筑建造学院,江苏徐州市221116 [2]中国矿业大学,江苏徐州市221116 [3]兖州煤业股份有限公司,山东兖州市273500

出　　处：《矿业研究与开发》2020年第8期144-149,共6页Mining Research and Development

基　　金：国家自然科学基金资助项目(51574226);江苏省住建厅项目(2019ZD083,2018ZD009);江苏省青蓝工程资助项目(2018).

摘　　要：针对葛泉矿1528工作面沿空留巷围岩控制难题,采用了组合支架切顶沿空留巷技术。通过建立基本顶应力力学模型,对组合支架切顶阻力进行校核,并利用FLAC^(3D)数值模拟软件,进行了24组数值模拟,分析了采高、采深、侧压系数、巷道宽度、直接顶厚度、直接顶强度等关键影响因素对组合支架切顶沿空留巷稳定性的影响。结果表明:设计的组合支架切顶阻力能够满足基本切顶条件;顶板下沉量与采高、采深、侧压系数和巷宽呈正相关,与直接顶厚度和直接顶强度呈负相关,如采深为200m时,顶板下沉76mm,采深为400m时,顶板下沉172mm,增大了126%;最后通过对比发现,采深、直接顶强度对组合支架切顶沿空留巷稳定性影响最为显著,其次是采高和巷宽,直接顶厚度和侧压系数的影响不明显。In view of the surrounding rock control problem of gob-side entry retaining in 1528 working face of Gequan mine,the technology of cutting-roof gob-side entry retaining with combination support was adopted.Through establishing the stress mechanics model of basic roof,the resistance of cutting roof with combination support was checked,and 24 groups of numerical simulation were carried out by FLAC3D numerical simulation software.The key influence factors on the stability of the gob-side entry retaining,including mining height,mining depth,lateral pressure coefficient,roadway width,direct roof thickness and direct roof strength,were analyzed.The results show that the cutting roof resistance of designed combination support can meet the basic cutting roof conditions.Roof subsidence is positively correlated with mining height,mining depth,lateral pressure coefficient and roadway width,and negatively correlated with direct roof thickness and direct roof strength.For example,when the mining depth is 200 m,the roof subsidence is 76 mm;when the mining depth is 400 m,the roof subsidence is 172 mm,increased by 126%.Finally,through comparison,it is found that the mining depth and direct roof strength have the most significant influence on the stability of the gob-side entry retaining,followed by the mining height and the roadway width,but the direct roof thickness and the lateral pressure coefficient have little influence.

关 键 词：组合支架 切顶卸压 沿空留巷 影响因素 

分 类 号：TD353[矿业工程—矿井建设]