采矿与安全工程学报Issue(3)：376-381,6.DOI:10.13545/j.cnki.jmse.2015.03.005
采动覆岩变形BOTDA分布式测量及离层分析
BOTDA distributed measurement and analysis of mining overburden separation
摘要
Abstract
In view of underground coal mining and stratigraphic features in Yangliu Coal Mine, by us-ing BOTDA fiber-optic sensing technology, the distributed monitoring methods of overburden deforma-tion were studied, the mining-induced deformation characteristics of overlying strata were analyzed, and the separation mechanism was further explored The results show that before the coal face passing through the vertical line of monitoring hole, as the coal face gets closer to monitoring hole, overlying strata pressure becomes more obviously, stress variation is greater, and the strata behavior ranges from the top deformation zone of overlying strata to the upper stable hard rock. After coal face passing through the monitoring hole, the bed separation appears gradually inside overlying strata, where the ten-sile stress value steadily increases, and the stress value is related to the thickness of stable hard rock, mechanical properties, mining range, and the distance to seam roof, etc. Distributed monitoring results basically tally with the theoretical calculations.关键词
覆岩变形/分布式监测/BOTDA/离层/煤层开采Key words
overburden deformation/distributed monitoring/BOTDA/bed separation/coal mining分类
矿业与冶金引用本文复制引用
朴春德,施斌,魏广庆,于霖,陈恩玉..采动覆岩变形BOTDA分布式测量及离层分析[J].采矿与安全工程学报,2015,(3):376-381,6.基金项目
国家自然科学基金重点项目(41230636)；国家自然科学基金青年基金项目(51004103)；江苏高校优势学科建设工程项目 （41230636）
