低应变反射波法在相似材料模型裂隙带探测中试验研究  

Experimental research on detection of fracture zone in similar material model by low strain reflected wave method

作　　者：张二伟 周俊杰 姚宇 Zhang Erwei;Zhou Junjie;Yao Yu(Yuwu Coal Industry Co.,Ltd.,Lu’an Group,Changzhi 046103,China;School of Earth Science and Engineering,Hebei Engineering University,Handan 056038,China)

机构地区：[1]潞安集团余吾煤业有限公司,山西长治046103 [2]河北工程大学地球科学与工程学院,河北邯郸056038

出　　处：《煤炭与化工》2022年第8期46-49,共4页Coal and Chemical Industry

摘　　要：相似材料模拟在矿井地质灾害综合研究中具有重要地位,解决了多种开采方式下煤层覆岩运动规律特征研究的难题。在相似材料模拟中,通过采掘活动在模型中形成不同空间位置的变形、变位及离析层、裂隙带发育,可判断覆岩破坏变形特征。利用弹性波场低应变反射原理和工程测桩设备高灵敏特性,对相似材料模拟模型进行变形前后探测,综合分析和解释变形位置及裂隙带分布。试验结果表明,低应变测量方式可对模型裂隙产生反映,与实际模型测量结果基本一致。Similar material simulation plays an important role in the comprehensive study of mine geological disasters,which solves the problem of studying the movement characteristics of coal seam under various mining methods. In the simulation of similar materials, the deformation,displacement and the development of segregation layer and fracture zone formed by mining activities in the model, can judge the failure deformation characteristics of overlying rock. Based on the low strain reflection principle of elastic wave field and the high sensitivity of engineering pile measuring equipment, the similar material simulation model was detected before and after deformation, and the deformation location and fracture zone distribution were comprehensively analyzed and explained. The experimental results showed that the low strain measurement method could reflect the model fracture, which was basically consistent with the actual model measurement results.

关 键 词：低应变反射波 相似材料模型 裂隙带 

分 类 号：TD163[矿业工程—矿山地质测量]