高村铁矿降低爆破地震强度的方法与研究
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摘要
高村铁矿二期工程自2005年正式开工建设以来,年采剥总量超过1000万t,随着采场规模的扩大和向下延伸,边帮暴露面积逐年加大,+30m封闭圈以上地形复杂,岩石风化严重,致使采场边坡不稳,采场爆破地震对边坡及近坑建筑的影响日趋严重。为了降低爆破地震所带来的负面影响,通过对爆破地震理论的分析,借鉴国内外一些降振经验,经过不断的总结和探索,采取间隔装药、清渣爆破、延时爆破等近10项,爆破降振措施,结合现场情况提出了今后爆破降震的改进途径等。
The 2nd phase construction of Gaocun Iron Mine was started in 2005,and now the annual stripping volume has exceeded 10 million t.With the expansion and downward extension of the pit,the slope wall exposure area has increased yearly.The enclosing circle area above +30 m has complex terrain and seriously weathered rock,leading to instability of the pit slope.The pit blast-caused seism has an increasingly more serious impact on the slope and the near-pit buildings.In order to reduce the negative influence of the blast seism,nearly ten pieces of measures such as interval charge, cinder cleaning blasting, delay blasting, have been taken to reduce the blast-cause vibration based on the theoretic analysis,domestic and foreign experiences and continuous summary and exploration. In the combination of the present status, the method for vibration reduciton on its future improvement are described.
The 2nd phase construction of Gaocun Iron Mine was started in 2005,and now the annual stripping volume has exceeded 10 million t.With the expansion and downward extension of the pit,the slope wall exposure area has increased yearly.The enclosing circle area above +30 m has complex terrain and seriously weathered rock,leading to instability of the pit slope.The pit blast-caused seism has an increasingly more serious impact on the slope and the near-pit buildings.In order to reduce the negative influence of the blast seism,nearly ten pieces of measures such as interval charge, cinder cleaning blasting, delay blasting, have been taken to reduce the blast-cause vibration based on the theoretic analysis,domestic and foreign experiences and continuous summary and exploration. In the combination of the present status, the method for vibration reduciton on its future improvement are described.
引文
[1]龙维祺,等·爆破工程:下册[M].北京:冶金工业出版社,1992.
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[3]骆秉才,周胜利·姑山采场临河爆破振动控制方案探讨[J]·金属矿山,2000(1):28-29·
[4]宋卫东,王在泉·高边坡工程爆破震动监测支护顺序[J]·金属矿山,2000(2):23-25·
[2]杜邦公司·爆破工程[M].北京:冶金工业出版社,1986.
[3]骆秉才,周胜利·姑山采场临河爆破振动控制方案探讨[J]·金属矿山,2000(1):28-29·
[4]宋卫东,王在泉·高边坡工程爆破震动监测支护顺序[J]·金属矿山,2000(2):23-25·
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