摘要
文中基于注水煤层内变量不可逆的热力学理论框架,从能量交换的角度出发,研究了注水煤体变形破坏过程的能量耗散、能量释放与煤岩体强度变化的内在联系,揭示均布应力场中煤层注水软化的损伤破坏机理。推导出各向等压条件下注水过程的煤体受损破坏的临界注水压力和塑性区半径表达式,并与经典水力致裂临界水压关系式进行了比较分析。通过试验结果对比,证明多孔介质煤层钻孔注水临界破坏参数的可靠性。
Based on rock failure mechanism and irreversible thermodynamics framework, in the view of energy exchange, it studies inner relationship among energy dissipation, energy release and coal strength in the process of coal seam water injection which leads coal deformation and failure, deduces coal failure criteria of water-infusion softening method based on energy dissipation theory, and reveal inner mecha- nism of energy dissipation in process of water injection in coal seam by further research through meso- damage mechanics
出处
《西安科技大学学报》
CAS
2013年第2期143-148,共6页
Journal of Xi’an University of Science and Technology
基金
陕西省"13115"科技创新工程重大科技专项项目(2009ZDKG57)
陕西省重点科研计划项目(DK05JS005)
神华新疆能源公司重点项目(SHKJ200908)
关键词
煤层注水
破坏机理
能量耗散
临界注水压力
coal seams water injection
failure mechanism
energy dissipation
critical press of injec-tion
