瓦斯抽采钻孔煤体破裂过程声发射特性试验研究  

Test of Acoustic Emission Characteristic of Coal-body Failure in Methane Drainage Bore-hole

作　　者：肖福坤[1] 刘刚[1] 樊慧强[1] 孟祥廪 

机构地区：[1]黑龙江省煤矿深部开采地压控制与瓦斯治理重点实验室(黑龙江科技学院),黑龙江哈尔滨150027 [2]吉林省金力试验技术有限公司,吉林长春130012

出　　处：《煤矿开采》2013年第2期7-10,共4页Coal Mining Technology

基　　金：教育部科学技术研究重点项目:复杂应力作用下瓦斯抽采钻孔稳定性分析(210064)

摘　　要：采用TAW-2000KN微机控制电液伺服岩石三轴试验系统和声发射(AE)三维定位实时监测系统,对带瓦斯抽采钻孔煤样和完整煤样(尺寸50mm×50mm×100mm)进行了压缩破坏声发射特性试验。试验结果表明:带瓦斯抽采钻孔煤样和完整煤样破坏形态完全不同。带瓦斯抽采钻孔煤样和完整煤样的加载时间与声发射事件数无显著差异。研究得到带瓦斯抽采钻孔煤体压缩破坏特征和声发射特性,为复杂应力作用下瓦斯抽采钻孔稳定性分析研究奠定基础。Applying TAW-200OKN computer-controlled electric-fluid servo 3-axial rock test system and acoustic emission monitoring system, coal samples drilled from methane drainage borehole and intact coal samples were tested for acoustic emission characteristic under compression. Test results showed that failure mode of borehole samples were different distinctly from that of intact samples. For the two kinds of samples, there was no distinct difference in loading time and acoustic emission matters number. Failure characteristic and acoustic emission characteristic of coal samples from methane drainage borehole were obtained, which provided basis for analyzing methane drainage borehole stability under complex stress condition.

关 键 词：瓦斯抽采钻孔 裂纹扩展 声发射 

分 类 号：TD712.1[矿业工程—矿井通风与安全]