高台阶抛掷爆破作用机理研究及应用  

Analysis and application of casting blast of high beach

作　　者：王平亮[1] 周伟[2] 杨海春[2] 黄建军[1] 张国营[2] 

机构地区：[1]神华准格尔能源有限责任公司黑岱沟露天煤矿,内蒙古自治区呼和浩特市010300 [2]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏省徐州市221008

出　　处：《中国煤炭》2011年第4期55-58,共4页China Coal

基　　金：国家十一五支撑项目(2006BAB16B00);国家863项目(2007AA06Z131)

摘　　要：为了提高露天矿抛掷爆破的有效抛掷率,根据影响有效抛掷率的因素,研究了炮孔倾角、台阶高度H与采宽B比值、炸药单耗对有效抛掷率的影响效果。结果表明:抛掷爆破采用倾斜炮孔,倾角要与台阶坡面角相近,台阶高度和采宽比通常为0.4～0.85,高能量炸药单耗为0.36～0.61 kg/m3。最后,通过黑岱沟露天煤矿抛掷爆破试验,验证了3种参数对有效抛掷率的影响情况。In order to enhance effective throwing rate of casting blast,base on the factors of affecting the effective throwing rate,inclination angle of hole,ratio of bench height and bench width,explosive consumption of blasting unit rock were analyzed,their affect also were studied.The results show that casting blast adopt inclined hole,inclination angle of hole should be similar to slope angle of bench,and ratio of bench height and bench width is about 0.4~0.85,and high-energy explosive consumption of blasting unit rock is about 0.36～0.61kg/m3.Last,through casting blast test of Heidaigou surface,the three parameters of impact factors on effective throwing rate were verified.

关 键 词：露天矿 抛掷爆破 有效抛掷率 影响因素 

分 类 号：TD824.2[矿业工程—煤矿开采]