摘要
底板突水是我国煤矿的重大灾害之一。采用钻孔声波测试法对澄合矿区董家河煤矿5号煤层22507工作面进行了底板破坏深度现场监测。监测结果表明:煤体下工作面正下方的底板破坏深度最大值为10.8m,同时采用FLAC3D有限差分程序,对董家河煤矿5号煤层22507工作面采场下开采顶底板破坏效应进行了模拟研究,数值模拟结果与现场实测结果相吻合,为今后董家河及类似矿井带压开采有效隔水层厚度选取和安全开采提供技术参考。
A water inrush from a mine floor is one of the major disasters occurred in China coal mine. A borehole sonic detection method was applied to a site monitoring and measuring of the floor failure depth in No. 22507 coal mining face in No. 5 seam of Dongjiahe Mine of Chenghe Mining Area. The monitoring and measuring results showed that the floor failure depth fight under the coal mining face was 10. 8m in max. A FLAC3D finite difference program was applied to the simulation study on the roof and floor failure effect under the mining operation of No. 22507 coal mining face in No. 5 seam of Dongjiahe Mine. The numerical simulation results and the site measured results were fitted to each and could provide technical references to the thickness selection of the effective water isolated stratum and the safety mining for the water pressure mining in Dongjiahe Mine and other similar coal mine.
出处
《煤炭工程》
北大核心
2014年第4期93-95,共3页
Coal Engineering
关键词
底板破坏深度
大采深
现场监测
数值模拟
floor failure depth
deep mining depth
site monitoring and measuring
numerical simulation
