水下开采顶板突水相似物理模型试验研究  

Physical Simulation Modeling of Roof Water Inrush in Underwater Mining

作　　者：陈红江[1] 李夕兵[1] 刘爱华[1] 彭述权[1] 贺显群[1] 

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083

出　　处：《中国矿业大学学报》2010年第6期854-859,共6页Journal of China University of Mining & Technology

基　　金：国家重点基础研究发展计划(973)项目(2007CB209402);湖南省研究生科研创新项目(CX2009B050);湖南省研究生学位创新项目(1343-74236000013);湖南省自然科学基金项目(08JJ4014)

摘　　要：针对山东三山岛海下金矿复杂的地质条件,根据相似理论建立其地质力学模型,采用固体石蜡和液体石蜡混合物作胶凝剂配置相似材料,基于开发的深部开采承压突水机制相似物理模型试验系统对其水下开采过程进行相似模拟.应用PCI-2声发射仪对实验过程进行声发射监测,对全过程模型开挖裂隙发展进行定位分析.结果表明:开挖至隔离层厚度为100mm时形成突水,并且在试验过程中,运用体式显微镜可以监测到顶板细观裂缝图,采用细观测量分析软件可测得裂缝平均裂缝宽度为0.08mm,上部裂缝水平倾角为32.26°.通过对水下矿山开采扰动过程中的位移变形进行统计分析、对微裂隙发展进行观测,可以较全面的掌握水下开采过程中采场顶板裂隙渗流诱发突水的机理.A physical model was used to simulate high-pressure water inrush during underwater mining.The model was constructed from parameters from the Sanshandao mine in Shandong province.An acoustic emission instrument（PCI-2）was used to locate crack development by observing emissions that occurred during the experiment.As the isolation layer in the model was excavated to 100mm water inrush occurred with development of microscopic cracks that were monitored by stereo-microscope.Using microscopic measurements with image analysis software the average crack width was determined to be 0.08mm with an inclination of the upper cracks of 32.26degrees.Observation of how the micro-cracks developed and statistical analysis of model deformation allowed the development of a comprehensive understanding of the mechanism by which water inrush,caused by seepage flow through roof fractures,occurs.

关 键 词：水下开采 相似物理模型试验 声发射 渗流 顶板突水 

分 类 号：TD76[矿业工程—矿井通风与安全] TD85