晒旗河磷矿掘进巷道工作面钻孔卸压参数优化  

Optimization of Drilling Pressure Relief Parameters in the Working Face of Shaiqihe Phosphate Mine

作　　者：王其虎[1,2] 周俊宝 姚囝 骆效兵[3] 伍蒙 张震 凌济锁 黄兆云 WANG Qihu;ZHOU Junbao;YAO Nan;LUO Xiaobing;WU Meng;ZHANG Zhen;LING Jisuo;HUANG Zhaoyun(College of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Provincial Industrial Safety Engineering Technology Research Center,Wuhan 430081,China;Hubei Emergency Rescue Center,Wuhan 430081,China;Dongda Mining Co.,Ltd.,Hubei Dongsheng Chemical Group,Yichang 444211,China;Hubei Jingshen Safety Technology Co.,Ltd.,Yichang 443000,China)

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081 [2]湖北省工业安全工程技术研究中心,湖北武汉430081 [3]湖北应急救援中心,湖北武汉430081 [4]湖北东圣化工集团东达矿业有限公司,湖北宜昌444211 [5]湖北景深安全技术有限公司,湖北宜昌443000

出　　处：《金属矿山》2024年第4期244-251,共8页Metal Mine

基　　金：湖北省安全生产专项(编号:SJZX20211004-1)。

摘　　要：岩爆是困扰晒旗河磷矿安全开采的主要技术难题,该矿钻孔卸压参数与围岩应力分布不匹配,卸压效果有待提高。以该矿+80 m工作面为研究对象,采用数值模拟对掘进巷道工作面不同钻孔卸压参数下巷道围岩的应力和弹性能变化情况进行分析,探寻最优的卸压钻孔参数方案。引入谷-陶岩爆判据,计算最大主应力和单轴抗压强度的比值,评价卸压钻孔参数优化前后的岩爆等级,验证钻孔卸压效果。研究结果表明:随着钻孔深度的增加,巷道围岩应力先减小后增大,当钻孔深度为10 m时,围岩应力和弹性能最小;在保持钻孔数量不变的情况下,钻孔间距过小,钻孔周围形成的卸压区域重叠,整体卸压范围受限,钻孔间距过大,每个钻孔间形成的卸压区域无法起到协同卸压作用。卸压钻孔参数优化后最大主应力下降了14 MPa,岩爆风险等级由中等岩爆降为无岩爆。研究结果可为鄂西地区类似矿山卸压钻孔参数的选用提供参考。Rock burst is a major technical challenge that troubles the safe mining of the Shaiqihe phosphate mine.The pressure relief parameters of the borehole in the mine don't match the stress distribution of the surrounding rock,and the pres-sure relief effect needs to be improved.Taking the+80 m working face of the mine as the research object,numerical simulation is used to analyze the changes in stress and elastic energy of the surrounding rock of the excavation roadway under different borehole pressure relief parameters.The optimal pressure relief drilling parameter scheme is explored,and the Gu-Tao rock burst criterion is introduced,calculate the ratio of maximum principal stress to uniaxial compressive strength,evaluate the rock burst level before and after optimizing the pressure relief drilling parameter scheme,and verify the pressure relief effect of drill-ing.The research results indicate that as the drilling depth increases,the stress in the surrounding rock of the tunnel first de-creases and then increases.When the drilling depth is 10 meters,the maximum tensile stress is the smallest;While maintaining the same number of boreholes,if the spacing between boreholes is too small,the pressure relief areas formed around the bore-holes overlap,and the overall pressure relief range is limited.If the spacing between boreholes is too large,the pressure relief areas formed between each borehole cannot play a synergistic pressure relief role.When the spacing between boreholes is 1.1 m,the maximum tensile stress is the smallest;The larger the drilling diameter,the smaller the stress concentration in the sur-rounding rock;After optimization,the maximum principal stress of the pressure relief drilling parameter scheme decreased by 14 MPa,and the risk level of rock burst decreased from moderate to no rock burst.The research results can provide reference for the selection of pressure relief drilling parameters in similar mines in western Hubei.

关 键 词：磷矿 岩爆 钻孔卸压 数值模拟 参数优化 

分 类 号：TD324[矿业工程—矿井建设]