自膨胀填塞体在梅山铁矿上向中深孔爆破中的试验研究  

Experimental Study on Self-expanding Filling Body in Upward Medium-length Hole Blasting in Meishan Iron Mine

作　　者：钟裔禄 李润然 ZHONG Yilu;LI Runran(Mining Branch of Nanjing Baodi Meishan Industrial City Development Co.,Ltd.;Key Laboratory of Ministry of Education for Safe Mining of Deep Metal Mines)

机构地区：[1]南京宝地梅山产城发展有限公司矿业分公司 [2]深部金属矿山安全开采教育部重点实验室

出　　处：《现代矿业》2024年第5期199-203,共5页Modern Mining

摘　　要：针对上向中深孔爆破缺乏合适的填塞材料,导致炸药能量利用率低、爆破效果差的问题,研发了一种兼具高强度和强膨胀压的自膨胀填塞体。自膨胀填塞体具有在钻孔内膨胀和硬化的特性,理论上能延长爆生气体作用时间,提高爆破能量利用率。试验结果表明,相比于炮泥填塞,自膨胀填塞体填塞炮孔的爆破振动速度更高,大块率和块度峰值降低,表明其作用于岩体的炸药能量更高。此外,自膨胀填塞体能有效抑制孔口爆破能量集中对眉线的破坏作用,有利于保护眉线。自膨胀填塞体体积小,填塞性能好,具有良好的推广应用前景。In view of the lack of suitable filling materials for upward medium-length hole blasting,re⁃sulting in low utilization rate of explosive energy and poor blasting effect,a self-expanding filling body with high strength and strong expansion pressure was developed.Based on its expansion and hardening character⁃istics in the borehole,the self-expanding filling body can theoretically prolong the action time of blasting gas and improve the utilization rate of blasting energy.The test results show that compared with the stem⁃ming,the blasting vibration velocity of the blasting hole filled with the self-expanding filling body is higher,and the bulk rate and the peak value of the block are reduced,indicating that the explosive energy acting on the rock mass is higher.In addition,the self-expanding packing can effectively inhibit the damage of the blasting energy concentration at the orifice to the brow line,which is beneficial to the protection of the brow line.The self-expanding filling body has small volume and good filling performance,and has a good prospect of popularization and application.

关 键 词：上向中深孔爆破 自膨胀填塞体 爆破振动 眉线 

分 类 号：TD235.33[矿业工程—矿井建设]