大垂深投放孔中矸石料运行规律探索

Study on the operation law of gangue in the large vertical depth hole

大口径钻孔垂直投料是实现煤矿批量固体充填料向井下高效输送的关键环节,邢东矿矸石充填预施工的投放孔落差达760余米,在国内投放孔落差较大,邢东矿大垂深投放孔投料是否可行、堵管预防及如何解决对投放孔下口冲击过大等课题有待进一步探索。近年来大钻孔投料在国内已有不少于10座煤矿应用,但由于投放孔落差大,实验室条件难以进行投料真实性模拟,导致国内相关科研机构对该技术的研究较少。基于国内相关煤矿的生产实际与理论分析,探讨了投放孔中矸石等物料的大体运行状态和规律,找出了相关难题的应对措施,为邢东矿及类似矿山深孔投料系统建设提供了科学的理论参考依据。

Vertical feeding of large-diameter borehole is the key link to realize high-efficiency transportation of solid bulk filling in coal mine to underground well.The drop hole of pre-construction of Xingdong Mine meteorite filling is more than 760 m,and the drop of hole drop in China is the largest known.It is still necessary to further explore the feasibility of the injection of holes in the large vertical depth of Xingdong Mine,and the prevention of pipe plugging and how to solve the problem of excessive impact on the lower hole of the hole.In recent years,there have been no fewer than 10 coal mine applying large boreholes in China.However,due to the large drop in the placement holes,laboratory conditions were difficult to simulate the authenticity of the feedstock,resulting in less research on the technology by relevant domestic research institutions.Based on the actual production and theoretical analysis of relevant domestic coal mines,the general operating states and laws of the materials such as vermiculite in the hole were discussed,and the countermeasures for related problems were found out,which provided scientific and theoretical basis for the construction of deep hole feeding system in Xingdong Mine and similar mines.