摘要
溜井放矿过程中堵塞问题与储料内部空隙率分布特征密切相关。为探究卸矿冲击对贮矿段储料夯实范围的影响,搭建1∶20的溜井储矿段相似模型,研究了不同卸矿高度以及不同级配矿石卸矿冲击对贮矿段储料夯实效果的影响。研究发现:溜井上部卸矿冲击使储料散体排列重组,改变了储料面以下一定范围内的储料空隙率;散体卸矿冲击下,井内整体储料空隙率变化范围为3~8个百分点,随卸矿高度增加,空隙率逐渐减小,主要集中在储料面以下150 mm范围内;大块矿石冲击下,储料空隙率变化范围远大于同质量散体矿岩的冲击,且随卸矿高度的增加,空隙率减小,主要集中在储料面以下250 mm范围内。结合研究成果,提出了避免卸矿冲击可能造成溜井堵塞的相关措施,对矿山生产实践具有一定的指导意义。
The blockage problem in the ore drawing process of the orepass is closely related to the distribution characteristics of the internal porosity of the storage material. In order to explore the influence of discharge impact on the ramming range of ore storage section, a similar model of ore storage section in the orepass with a similarity ratio of 1∶20 was built, and the influences of discharge impacts with different discharge heights and different grading ores on the ramming effect of ore storage section were studied. The research shows that the discharge impact on the upper part of the orepass causes the arrangement and reorganization of the storage particles, and changes the porosity within a certain range below the storage surface. Under the discharge impact of particle ores, the porosity of the overall storage in the pit varies from 3~8 percentage points. With the increase of ore discharge height, the porosity gradually decreases, and mainly concentrates in the range of 150 mm below the storage surface. Under the impact of bulk ore, the change range of storage porosity is much larger than that of particle ores with the same mass, and with the increase of discharge height, the porosity decreases, mainly concentrates in the range of 250 mm below the storage surface. Combined with the research results, the relevant measures are put forward to avoid the orepass blockage caused by discharge impact, which has a certain guiding significance for mine production practice.
作者
王少阳
邓哲
路增祥
WANG Shaoyang;DENG Zhe;LU Zengxiang(School of Mining Engineering,University of Science and Technology Liaoning,Anshan,Liaoning 114051,China;Engineering Research Center of Green Mining of Metal Mineral Resources Liaoning Province,Anshan,Liaoning 114051,China)
出处
《矿业研究与开发》
CAS
北大核心
2022年第4期69-73,共5页
Mining Research and Development
基金
国家自然科学基金项目(51774176)。
关键词
溜井卸矿
贮矿段
储料空隙率
冲击夯实
矿石流动性
Ore discharge in orepass
Ore storage section
Porosity
Impact ramming
Ore fluidity
