骨料矿山爆破粉矿率控制技术研究

金属矿山 ›› 2022, Vol. 51 ›› Issue (07): 80-88.

• “矿山爆破理论与新技术进展”专题 • 上一篇下一篇

骨料矿山爆破粉矿率控制技术研究

叶海旺^1,2李兴旺¹袁尔君³雷涛^1,2

1.武汉理工大学资源与环境工程学院，湖北武汉 430070；2.矿物资源加工与环境湖北省重点实验室，湖北武汉 430070；3.中建三局集团有限公司，湖北武汉 430070

出版日期:2022-07-15 发布日期:2022-07-31
基金资助:
“十四五”国家重点研发计划项目（编号：2021YFC2902901）；“十三五”国家重点研发计划项目（编号：2020YFC1909602）；湖北省重点研发计划项目（编号：2021BCA152）。

Blasting Powder Rate Control Technique in Aggregate Mines

YE Haiwang^1,2LI Xingwang¹YUAN Erjun³LEI Tao^1,2

1. School of Resources and Environment Engineering,Wuhan University of Technology,Wuhan 430070,China;2. Hubei Key Laboratory of Mineral Resources Processing and Environment,Wuhan 430070,China;3.China Construction Third Engineering Bureau Group Co.,Ltd.,Wuhan 430070,China

Online:2022-07-15 Published:2022-07-31

摘要/Abstract

摘要： 控制爆破粉矿产率是减少骨料矿山矿石损失，促进骨料矿山高质量发展的重要途径。以某石灰石骨料矿山为例，首先通过矿山现场取样，开展了岩石动力学试验，结合破碎体筛分试验，分析了动载作用下石灰石破碎特征，讨论了控制粉矿产生的能耗密度范围和对应的动载强度范围。然后，以试验结果为依据，引入动载强度和质点振动速度峰值判据，开展了不同孔间延期时间台阶爆破数值模拟，以降低爆破粉矿产率为目标，并兼顾控制爆破大块产率，对孔间延期时间进行了优化。最后将优化后的延期时间用于矿山生产爆破，验证优化效果。研究表明：控制粉矿产生的合理能耗密度为1.85~2.05 J/cm³，对应的动载强度为200~205 MPa；数值模拟结果显示，延期时间为20 ms时，爆破粉矿率和大块率均较低，爆破效果最佳；矿山孔间延期时间调整为20 ms后，爆破粉矿率降低了6.12%，爆破大块率和平均破碎尺寸也相应减小。

关键词: 骨料矿山, 爆破粉矿率, 延期时间, 动力学试验

Abstract: Controlling the rate of blasting powder ore is an important way to reduce ore loss and promote high quality development of aggregate mine.Taking a limestone aggregate mine as an example,firstly, rock dynamics tests were carried out through on-site mine sampling,and the crushing characteristics of limestone under dynamic load were analyzed in combination with the screening test of broken rock,and the range of energy consumption density and corresponding dynamic load intensity which control powder ore production were explored.Secondly, based on the test results,the dynamic load strength and particle vibration velocity peak criterion were introduced to carry out numerical simulation of bench blasting with different delay time between holes,aiming at reducing the rate of blasting powder mineral and taking into account the yield of controlling blasting bulk,the delay time between holes was optimized.Finally,the optimized delay time is applied to mine production blasting to verify its optimization effect.The results show that the reasonable energy consumption density for control of powder ore is in the range of 1.85~2.05 J/cm³,and the corresponding dynamic load strength is in the range of 200~205 MPa.The numerical simulation results show that when the delay time is 20 ms,the blasting powder ore rate and bulk rate are relatively low, and the blasting effect is the best.When the delay time between holes is adjusted to 20 ms,the blasting powder ore rate decreases by 6.12%,and the blasting bulk rate and average crushing size also decrease correspondingly.

Key words: aggregate mine,blasting powder ore rate,delay time,dynamic test

叶海旺, 李兴旺, 袁尔君, 雷涛. 骨料矿山爆破粉矿率控制技术研究[J]. 金属矿山, 2022, 51(07): 80-88.

YE Haiwang, LI Xingwang, YUAN Erjun, LEI Tao. Blasting Powder Rate Control Technique in Aggregate Mines[J]. Metal Mine, 2022, 51(07): 80-88.

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骨料矿山爆破粉矿率控制技术研究

Blasting Powder Rate Control Technique in Aggregate Mines

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