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摘要: 借鉴爆破工程经验,结合层内爆炸压裂实际,应用能量守恒原理,将液体炸药爆炸形成的冲击波能 量分为岩石破碎的表面能和岩石内部的应变能,结合岩石断裂理论建立了粉碎区内岩石破碎粒径的预测模 型。实例计算层内爆炸压裂形成的岩石颗粒直径为1.43mm。计算结果表明:液体炸药层内爆炸后形成的 岩石破碎颗粒与石油工业中水力压裂使用的支撑剂粒径相当,能够支撑形成具有一定导流能力的裂缝。Abstract: Accordingtotheblastingexperiencesandactualexplosion-in-rockinducedrockfragmentation, theshockwaveenergyproducedbytheliquidexplosiveexplosionwasseparatedintothesurface energyofthefracturedrockandthestrainenergyintherockbyapplyingtheenergyconservationlaw. Andbasedontherockfracturemechanicsprinciple,amodelwasproposedtopredicatethefragmented rockparticlesizesinthecrackedregion.Acalculationexamplewasgiveninwhichthediameterofthe fragmentedrockparticleswas1.43mm.Thecalculatedresultsdisplaythatthediameterofthefragmentedrockparticlegeneratedbytheliquidexplosiveexplosioninrockisequivalentt thatofthehydraulicfracturingproppantparticleintheoilindustry.
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Key words:
- mechanicsofexplosion /
- particlessize /
- in-fractureexplosivefracturing /
- rock
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