岩石能量体概念及岩石破碎指标研究  

Research on the Concept of Rock Energy Body and Rock Fragmentation Index

作　　者：郭连军 王雪松 徐振洋 李萍丰 刘鑫 GUO Lianjun;WANG Xuesong;XU Zhenyang;LI Pingfeng;LIU Xin(School of Architecture and Civil Engineering,Shenyang University of Technology,Shenyang 110870,China;School of Mining Engineering,University of Science and Technology Liaoning,Anshan 114051,China;Hongda Blasting Engineering Group Co.,Ltd.,Guangzhou 510623,China)

机构地区：[1]沈阳工业大学建筑与土木工程学院,辽宁沈阳110870 [2]辽宁科技大学矿业工程学院,辽宁鞍山114051 [3]宏大爆破工程集团有限责任公司,广东广州510623

出　　处：《金属矿山》2024年第11期1-10,共10页Metal Mine

基　　金：国家自然科学基金项目(编号:51974187);辽宁科技大学青年骨干人才项目(编号:601011507-25);辽宁省教育厅项目(编号:LJKZ0282)。

摘　　要：为推动岩石破碎理论的发展,从地质学中岩石形成角度出发提出了岩石可视为具有抵抗破碎能力的“内敛能量物质”这一概念。借助晶核破碎学中的观点,从微观角度将岩石破碎解释为岩石晶体间结合能的打破,说明了岩石破碎中的能量消耗与表面能有关,并给出了采用NSCB劈裂试验的表面能计算方法,进而推导了岩石能量体的破碎能耗计算方法,基于此建立了岩石破碎程度指标。选取了已有文献中的试验参数,试算了具有代表性的岩石能量体破碎能耗值。结果表明:岩石能量体的破碎能耗随岩石目标破碎尺度减少而增大;在霍普金森试验中,未完全破碎条件下的岩石破碎能耗大于完全破碎条件,该部分能量由岩石内部损伤与塑性应变消耗;根据破碎能耗值定义计算的岩石破碎指标Ku,能够定量描述岩石的破碎程度,弥补定性描述的不足。研究结果丰富了岩石破碎理论,能够为岩石力学及相关岩石破碎工程提供参考。In order to promote the development of rock fragmentation theory,the concept that rock can be regarded as"introverted energy material"with the ability to resist fragmentation is proposed from the geology.Based on the crystal fragmentation,rock fragmentation is interpreted as the breaking of binding energy between rock crystals in microscopic,it shows that energy consumption in rock fragmentation is related to surface energy.The calculation method of surface energy is given by NSCB splitting test,the fragmentation energy consumption of rock energy body and rock crushing degree index is proved.The test parameters in the existing literature are selected,and the representative rock energy body fragmentation energy consumption is calculated.The results show that the fragmentation energy consumption of rock energy body increases with the decrease of rock target crushing scale;In SHPB,the energy consumption of rock fragmentation under incomplete fragmentation condition is greater than that under complete fragmentation condition,and this part of energy is consumed by internal damage and plastic strain of rock.The rock fragmentation index Ku calculated according to the definition of fragmentation energy consumption value can quantitatively describe the degree of rock fragmentation,making up for the shortcomings of qualitative description.The research results enrich the rock fracture theory and can provide reference for rock mechanics and related rock fragmentation engineering.

关 键 词：岩石力学 岩石破碎 岩石断裂 表面能 破碎理论 

分 类 号：TD325[矿业工程—矿井建设]