矿岩落石是井下作业最主要的致伤因素。最近五年来,尽管矿岩落石致伤率有所下降,但是在井下作业的全员重伤人身事故率当中,落石致伤事故所占比例仍然很高(30％)。在最近十年当中苏联黑色冶金工业部所属各地下矿山落石致伤的分布情况表明,主 Rockfall is the most important caustic factor in downhole operation. In the recent five years, although the injury rate of ore rockfall decreased, the proportion of rockfall injury accidents is still high (30%) among the accidents involving serious injuries and injuries caused by downhole operations. During the recent ten years, the distribution of rockfall injuries in various places under the jurisdiction of the Soviet Union’s Black Metallurgical Industry Department shows that the main