Taking the west area in Wulongquan Limestone Mine of WISCO as an example,the reason is analyzed and large diameter deep-hole springing blasting is suggested.

• 文章以乌龙泉矿西区原始缓边坡为例,从理论上分析了出现这一问题的原因,提出采用大直径孔药壶爆破可较好地处理这一问题。