上层煤柱下综放沿空回采巷道矿压规律研究  

Fully Mechanized Top-coal Caving:Underground Stress at Gateways Under Barrier Pillars of an Upper Coal Seamm

作　　者：屠世浩[1] 王方田[1] 窦凤金[1] 袁永[1] 鲁岩[1] 

机构地区：[1]中国矿业大学矿业工程学院煤炭资源与安全开采国家重点实验室,江苏徐州221116

出　　处：《中国矿业大学学报》2010年第1期1-5,共5页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(50374065);江苏省"青蓝工程"项目

摘　　要：为揭示上层残留煤柱下综放沿空回采巷道矿压显现规律,有效控制围岩变形,根据阳泉一矿8902综放面地质与开采条件,结合现场沿空回采巷道矿压观测结果,应用FLAC3D数值模拟计算分析回采巷道塑性区发育及应力分布情况.研究表明,综放回采巷道在上层残留煤柱影响与本层煤回采引起的应力重新分布耦合作用下,回风巷两帮及顶底移近量高达1985,1877mm,局部断面不足2m2,严重制约了工作面安全高效生产,采取合理布置回采巷道及减小区段煤柱宽度等措施可有效维护巷道.The stress distribution and regions of plastic deformation in working panel number 8902 were calculated with FLAC^3D. Field geological data and gateway deformation were surveyed in the same working panel. The gateway deformation between roof and floor is 1 985 mm and the deformation between the ribs is 1 877 mm. The cross-section of the gateways is less than 2 m^2, which seriously affects productivity. Support of the gateways may be achieved by rational layout of the stope drift of active workings and by decreasing the width of the barrier pillar between the working panels.

关 键 词：区段煤柱 综放开采 沿空巷道 矿压规律 

分 类 号：TD322[矿业工程—矿井建设]