“亿级”自由度数值模拟技术及其工程应用  

More Than 100 Million DOF Numerical Simulation Technique and Its Engineering Application

作　　者：侯俊旭 杨天鸿[1,2] 马凯 赵永[1,2] HOU Jun-xu;YANG Tian-hong;MA Kai;ZHAO Yong(School of Resources&Civil Engineering,Northeastern University,Shenyang 110819,China;Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819 [2]东北大学深部金属矿山安全开采教育部重点实验室,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2023年第9期1298-1308,共11页Journal of Northeastern University(Natural Science)

基　　金：中央高校基本科研业务费专项资金资助项目(N2201003);国家自然科学基金资助项目(U1710253,U1903216,52004052).

摘　　要：为解决数值模拟方法在大型岩体工程稳定性分析中精度低、误差大的问题,开发了一种“亿级”自由度数值模拟技术.以大红山铁矿露天与地下联采地表岩移工程问题为例,详细阐述了“亿级”自由度数值模拟技术流程.将模拟计算结果与实测地表裂隙范围相结合,提出了一种模糊沉降值反演地表裂隙范围的方法.将该方法与“亿级”自由度数值模拟方法结合使用,可对地表裂隙发育范围进行准确估算,位置绝对误差在1.59~4.71 m,总长度误差率在1.141%,验证了方法的可靠性,较常用的百万级自由度数值模拟方法有了提升.同时,对5年后露坑联采地表裂隙范围进行了估算.随着5年后地下300~720 m标高矿体采出,虽然塌陷坑废石充填对围岩变形具有抑制作用,但地表沉降及开裂范围仍会波及露天境界,预计裂隙区域至少将影响露天矿990 m标高台阶以上范围.In order to solve the problems of low accuracy and abnormal error in numerical simulation method for stability analysis of large-scale rock mass engineering,a more than 100 million degree-of-freedom(DOF)numerical simulation technique was developed.Taking the surface rock movement engineering of open-pit and underground combined mining at Dahongshan iron mine as an example,this technique is elaborated in detail.Combining the simulated results with the fissure of ground surface range,a method of the fissure of ground surface range inversed by fuzzy surface subsidence value is proposed.Combined with the more than 100 million DOF numerical simulation technique,this method accurately estimates the development of the fissure of ground surface range.The absolute error of position is 1.59~4.71 m with a span error rate of 1.141%,verifing the reliability of the method and improving accuracy compared to the commonly numerical simulation method of millions DOF.At the same time,the fissure of ground surface range is estimated after 5 years.With the mining of underground 300~720 m level ore body five years later,although the waste rock filling of collapse pit can inhibit the deformation of surrounding rock,the surface movement and cracking range will still affect the open-pit,and it is estimated that the crack area will affect the range above 990 m steps at least in the open-pit.

关 键 词：“亿级”自由度 数值模拟 精细化建模 露坑联采 地表沉降 

分 类 号：TD73[矿业工程—矿井通风与安全]