高压线铁塔下放顶煤开采及其安全性研究  

Study of Coal Caving Mining Under the Steel Tower ofHigh-Voltage Transmission Line and Its Safety

作　　者：郭文兵[1] 郑彬[2] 

机构地区：[1]河南理工大学能源科学与工程学院,河南焦作454000 [2]中煤国际工程集团武汉设计研究院,湖北武汉430064

出　　处：《采矿与安全工程学报》2011年第2期267-272,共6页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(50974053);国家重点基础研究发展计划(973)项目(2009CB226107)

摘　　要：为了开采高压线铁塔下压煤,并保护铁塔的安全,采用地表移动变形预计与现场实测相结合的方法,从采动引起的铁塔基础不均匀沉降量、高压线铁塔的倾斜、转角、根开以及铁塔下沉速度等方面分析研究了放顶煤开采影响下高压输电线路铁塔的安全性.研究结果表明:高压线塔基础不均匀沉降量、铁塔的倾斜值均超过一般建筑物的Ⅳ级损害标准,高压线铁塔抵抗地表变形能力大于一般建(构)筑物;铁塔中心的下沉速度随工作面推进过铁塔距离的增大呈对数关系衰减;高压线对铁塔的变形有约束和协同变形作用,使采动过程中铁塔塔身倾斜变形不一致,出现明显的挠度.研究结果指导了高压线铁塔下采煤,高压线铁塔采动影响期间运行良好,实现了高压线铁塔下安全采煤.In order to exploit the coal under the steel tower of high-voltage transmission line and ensure the safety of the tower,we studied the safety of such tower affected by caving mining,based on the data of field observation and surface movement and deformation predicting,from the following aspects： uneven subsidence of the tower foundations,slope of the tower,torsion,space between tower foundations and subsidence velocity of the tower.The results indicate that the uneven subsidence of the tower foundations and the tower slope exceed the band four damage criterion of common structures.The surface deformation of which the tower can resist is greater than that of common structures.The results also demonstrate that the surface subsidence velocity of the tower centre decreases with the increase of the distance between the tower and face line in a logarithm relationship.The high-voltage transmission lines have a restriction effect on the tower deformation and synergy deformation with the tower.The slope of the tower structure is different from the top to bottom during undermining and the tower structure is obviously curved.These results have been used to guide the mining practice under the high-voltage transmission line tower.The tower runs well and is quite safe during the mining activity.

关 键 词：放顶煤开采 高压线铁塔 安全性 地表移动变形 协同变形 

分 类 号：TD325[矿业工程—矿井建设]