煤层底板破坏深度现场测试与数值模拟对比研究  

Comparative Study of Coal Floor Failure Depth On-site Test and Numerical Simulation

作　　者：黄欢[1,2,3] 刘其声 姬亚东 Huang Huan Liu Qisheng Ji Yadong(China Coal Research Institute, Beijing 100013 Xi＇an Research Institute, China Coal Technology ＆ Engineering Group Corp, Xi＇ an, Shaanxi 710077 Shaanxi Key Laboratory of Coalmine Water Hazard Prevention and Control Technology, Xi ＇an, Shaanxi 710077)

机构地区：[1]煤炭科学研究总院,北京100013 [2]中煤科工集团西安研究院有限公司,西安710077 [3]陕西省煤矿水害防治技术重点实验室,西安710077

出　　处：《中国煤炭地质》2016年第12期49-54,共6页Coal Geology of China

基　　金："十二五"国家科技支撑计划课题(2012BAK04B04);国家自然科学基金青年科学基金(41402220);陕西省自然基金项目(2011JQ5015)

摘　　要：以钻孔分段注水试验的原理,设计CS-4、CS-5、CS-6共3个测试钻孔,采用钻孔双端堵水设备对准格尔煤田黄玉川矿6上01工作面进行底板破坏深度测试,现场实测其破坏深度为34.9 m。同时,利用FLAC3D数值模拟软件,模拟工作面开采过程中的采动应力分布规律、塑性区分布、底板岩层位移特征以及不同采宽条件下底板破坏深度。研究结果表明:数值模拟的底板破坏深度为36 m,与现场实测深度相吻合;底板破坏深度随工作面采宽的增加而增大,当采宽达到250 m时,底板破坏深度增幅变得缓慢,据此认为大采宽工作面采矿扰动加剧了底板破坏程度。On the basis of borehole sectional water injection test principle, designed CS-4, CS-5 and CS-6 three boreholes, using borehole double ended water plugging equipment carried out coal floor failure depth test for coal 6U No.01 working face in Huangyuchuan coalmine, Jungar coalfield; the site measured failure depth is 34.9m. Meanwhile, using FLAC 3o numerical simulation software, simulated working face mining stress distribution pattern, plastic zone distribution, floor rock displacement features and floor failure depth under different cut widths during mining process. The result has shown that the floor failure depth is 36m from numerical simulation, kept accord with site measured. Floor failure depth increasing with increasing of working face cut width; until the width increased to 250m the increasing amplitude will be lowered. So that the working face large cut width will intensify floor failure extent.

关 键 词：底板破坏深度 注水试验 数值模拟 大采宽 

分 类 号：TU745[建筑科学—建筑技术科学]