摘要
锚杆支护参数的合理选择是实现锚杆支护作用效果的重要依据,合理地设计及优化锚杆的支护参数可以提高支护的有效性和针对性。针对太平矿业公司矽卡岩型铜铁矿床的支护问题,采用理论分析与数值模拟,以原有支护方案为参照,设计不同参数的锚杆支护方案,进行优化研究。基于松动圈现场测量结果,通过理论计算确定了合理的锚杆长度为2.0 m;利用Flac3D软件,建立井下巷道锚杆支护的三维数值模型,采用应变软化本构模型描述矽卡岩型软岩特性,对不同锚杆间排距的支护方案进行计算与分析。通过对巷道顶底板及两帮位移量的分析,结合巷道断面塑性区面积结果对比,确定了锚杆的间排距为800 mm×800 mm,合理支护参数的选择为矿山安全高效生产提供技术支撑。
The reasonable selection of bolt support parameters is an important basis for realizing the effect of bolt support,and the reasonable design and optimization of bolt support parameters can improve the effectiveness and relevance of support.In the case study of the support difficulties in the skarn-type copper and iron deposit of Taiping mining company,bolt support schemes with different parameters were designed by theoretical calculation and numerical simulation and comparison with the original support scheme,and the optimization was studied.Based on the field mea-surement of the broken zone,the reasonable bolt length was determined by theoretical calculation to be 2.0 m;Secondly,a three-dimensional numerical model of underground bolt support was established by Flac3 D software,and the strain-softening intrinsic model is used to describe the characteristics of the skarn soft rock,calculate and analyze the support schemes with different bolt inter-row spacing.By analyzing the displacement of the roof and bottom of the roadway and the two sides,and comparing the plastic zone area of the roadway section,the inter-row spacing between the bolts was determined to be 800 mm×800 mm.The reasonable selection of support parameters provides technical support for the safe and efficient production of the mine.
作者
褚吉祥
蒲江涌
孙鹏
Chu Jixiang;Pu Jiangyong;Sun Peng(Anhui Taiping Mining Co.,Ltd.;Center for Rock Instability and Seismicity Research,Northeastern University)
出处
《黄金》
CAS
2021年第7期41-46,49,共7页
Gold
关键词
软岩巷道
巷道支护
锚杆参数
矽卡岩
松动圈
数值模拟
soft rock roadway
roadway support
bolt parameters
skarn
broken zone
numerical simulation
