大红山铜矿井下充填体及围岩稳定性数值模拟研究
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摘要
井下充填体及围岩的稳定性不仅关系到井下人员及设备的安全,对残留矿房、矿柱的回采也有一定的影响。为了给矿山井下充填体和围岩稳定性研究提供一些参考,在了解国内外相关学者研究的基础上,结合ANASYS数值模拟,对大红山铜矿385中段盘区连续开采进行模拟计算,结果表明:矿房、矿柱的开采对周边围岩及相邻充填体稳定性有不同程度的影响。其中,矿柱在开挖后,部分区段的上、下盘矿岩的的Von Mises等效应力、应变及合成位移较顶、底板的大,且相邻矿房临空面稳定性受影响较大,部分甚至有垮塌的可能;胶结充填后,围岩、上、下盘及矿房临空面稳定性都有提高,其中上、下盘的最大位移减少了16.7%。
The stability of underground backfill body and surrounding rock not only related to the safety of underground mine personnel and equipment,but also has a certain influence to the extraction of residual stope room,and jamb. For the purpose of supply some references to the stability study of underground backfill body and surrounding rock, on the basis of understanding the relevant academic research both in domestic and abroad,and combining with the ANASYS numerical modeling,the analog computation of the continuous mining in 385 middle panel of Dahongshan copper mine,the results show:the extraction of stope room and jamb has the different degrees of influence to the stability of the surrounding rock and the adjacent backfill body. After excavation of jamb,the Von Mises equivalent stress,strain and synthetic displacement of the upper and lower panel of ore-bearing rock are larger than the roof and the basal;the stability of free face of the adjacent stope room is affected greatly,partial of them even have the possibility of collapse;the stability of the surrounding rock, the upper and lower panels, as well as the free face of stope room are strengthened after cementation filling,and the maximum displacement of the upper and lower panels were reduced by 16.7%.
The stability of underground backfill body and surrounding rock not only related to the safety of underground mine personnel and equipment,but also has a certain influence to the extraction of residual stope room,and jamb. For the purpose of supply some references to the stability study of underground backfill body and surrounding rock, on the basis of understanding the relevant academic research both in domestic and abroad,and combining with the ANASYS numerical modeling,the analog computation of the continuous mining in 385 middle panel of Dahongshan copper mine,the results show:the extraction of stope room and jamb has the different degrees of influence to the stability of the surrounding rock and the adjacent backfill body. After excavation of jamb,the Von Mises equivalent stress,strain and synthetic displacement of the upper and lower panel of ore-bearing rock are larger than the roof and the basal;the stability of free face of the adjacent stope room is affected greatly,partial of them even have the possibility of collapse;the stability of the surrounding rock, the upper and lower panels, as well as the free face of stope room are strengthened after cementation filling,and the maximum displacement of the upper and lower panels were reduced by 16.7%.
引文
[1]王俊.空场嗣后充填连续开采胶结体强度模型及其应用[D].昆明：昆明理工大学，2017.
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[2]刘让.大红山铜矿矿柱回采技术研究[D].昆明：昆明理工大学，2010.
[3]亓中华，张纪伟，胡建华，等.卧虎山矿充填体强度参数的反演计算与数值模拟[J].矿业研究与开发，2018,38(11):26-30.
[4]秦艳华，王晓军，钟春晖，等.矿柱回采对采空区稳定性影响数值模拟研究[J].铜业工程，2007(3):8-10.
[5]张世雄，任高峰，彭涛，等.矿柱回采设计的三维有限元数值模拟研究[J].西部探矿工程，2004(7):79-81.
[6]钟瑞，张红军，张晶.基于ANSYS的采空区稳定性数值模拟研究[J].化工矿物与加工，2017,46(5):52-56.