厚煤层综放开采底板破坏特征研究  

Study on Floor Failure Characteristics of Fully Mechanized Top Coal Caving in Thick Coal Seam

作　　者：刘刚 张风达[2,3] 张志巍 孙林 曹路通[2,3] LIU Gang;ZHANG Fengda;ZHANG Zhiwei;SUN Lin;CAO Lutong(Jinggong No.1 Mine,China Coal Pingshuo Group Co.,Ltd.,Shuozhou 036000,China;Coal Mining and Designing Department,Tiandi Science and Technology Co.,Ltd.,Beijing 100013,China;CCTEG Coal Mining Research Institute,Beijing 100013,China)

机构地区：[1]中煤平朔集团有限公司井工一矿,山西朔州036000 [2]天地科技股份有限公司开采设计事业部,北京100013 [3]中煤科工开采研究院有限公司,北京100013

出　　处：《煤炭技术》2022年第12期67-70,共4页Coal Technology

摘　　要：为研究厚煤层综放开采工作面底板破坏特征,运用滑移线场理论,构建了靠近工作面超前支承压力影响的底板破坏深度计算模型,采用数值模拟分析了不同推进度下的覆岩破坏特征,采用瞬变电磁法,开展煤层底板破坏深度探测工作。研究结果表明,在考虑超前支承压力影响下工作面煤层底板最大破坏深度为28.15 m,在工作面达到充分采动时,上覆岩层破坏形态呈现出马鞍形,而煤层底板破坏呈现出勺形,采用瞬变电磁法获取的煤层底板破坏深度为35 m,且工作面回采后未出现异常突水现象,研究结果确保了工作面的安全回采。In order to study the floor failure characteristics of the fully mechanized top coal caving face in thick coal seam, the calculation model of the floor failure depth affected by the advance bearing pressure near the working face is constructed by using the slip line field theory. The overburden failure characteristics under different pushing progress are analyzed by numerical simulation, and the detection of the floor failure depth of coal seam is carried out by using the transient electromagnetic method. The research results show that under the influence of advance bearing pressure, the maximum failure depth of coal seam floor in the working face is 28.15 m. When the working face reaches full mining, the failure form of overlying strata presents saddle shape, while the failure of coal seam floor presents spoon shape. The failure depth of coal seam floor obtained by transient electromagnetic method is 35 m,and there is no abnormal water inrush after mining, the research results ensure the safe mining of the working face.

关 键 词：底板破坏 滑移线场理论 数值模拟 瞬变电磁 

分 类 号：TD322[矿业工程—矿井建设]