董家河煤矿大采深条件下底板破坏深度的实测与模拟分析

 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。

In-situ Measurement and Simulation Study on Failure Depth of Dongjiahe Coal Mine at Big Mining Depth

Floor water gushing-out is one of the most serious national casualty in coal mine. Based on the analysis of engineering geological conditions of Dongjiahe Coal Mine, floor failure depth of 22507 working face of NO. 5 coal seam was measured by appling drilling sonic method. At the same time, the failure effect of 22507 working face was simulated by using finite difference program of FLAC3D. Finally, the simulated results were compared with in-situ measurement results, and the anastomotic degree is well. It provides a reference for determing floor failure depth of total Dongjiahe Coal Mine and similar Mine..