12微震技术在地下矿山的应用研究吴佐汉(福建省冶金工业设计院有限公司,福建福州350011)【摘要】矿山开采破坏了原岩应力平衡,在应力重新平衡过程中势必会在采掘工作面附近矿体或围岩中产生局部应力集中现象,超过围岩系统强度极限时就会发生损伤破坏甚至失稳,伴随着弹性能的释放,以弹性波的形式经围岩介质往外围传播,形成矿山震动(简称微震)。本文利用微震监测系统对各事件发震时间、三维位置及能量进行实时监测,从而分析矿山岩体的断裂信息、描述空间岩层结构运动和应力场的迁移演化规律、判别动力灾害危险程度,为矿山安全生产提供科学依据。研究表明,发生矿山动力灾害的可能性和微震能量有很大的关系,能量越大,岩体破坏尺度越大,发生动力灾害的可能性就越大。【关键词】微震;能量;应力;安全ApplicationofMicroseismicTechnologyinUndergroundMinesWuZuohan(FujianMetallurgicalIndustryDesignInstituteCo.,Ltd.,Fuzhou350011,Fujian)【Abstract】Miningdestroysthestressbalanceoftheoriginalrock.Intheprocessofstressrebalancing,localstressconcentrationisboundtooccurintheorebodyorsurroundingrockneartheminingface.Whenthestrengthlimitofthesurroundingrocksystemisexceeded,damageandeveninstabilitywilloccur.Withthereleaseofelasticproperties,itwillspreadtotheperipheryintheformofelasticwavesthroughthesurroundingrockmedium,formingminevibration(referredtoasmicroseism).Inthispaper,themicroseismicmonitoringsystemisusedtomonitortheoccurrencetime,three-dimensionalpositionandenergyofeacheventinrealtime,soastoanalyzethefractureinformationofminerockmass,describethemigrationandevolutionlawofspatialrockstructuremovementandstressfield,andidentifytheriskdegreeofdynamicdisasters,soastoprovideascientificbasisforminesafetyproduction.Theresearchshowsthatthepossibilityofminedynamicdisasterhasagreatrelationshipwithmicroearthquakeenergy.Thegreatertheenergyis,thelargertherockmassfailurescaleis,thegreaterthepossibilityofdynamicdisasteris.【Keywords】microseismic;energy;stress;safety———————————————————————————作者简介:吴佐汉(1988-),男,采矿工程硕士研究生,工程师,毕业于北京科技大学采矿工程专业,从事专业:采矿工程。收稿日...