不能用竹篾作井筒支护材料１９９７年７月８日和９日，笔者随同宜春地区煤炭冶金局毛副局长到丰城市察看了３家个体（联户）办煤矿，发现有２个井筒用的是竹篾编织成的圆圈进行支护，１个井筒未作任何支护。在丰城，一些个体（联户）办煤矿用竹篾支护井筒到处可见，而且一... Can not use bamboo shoal for wellbore support materials July 8 and 9, 1997, together with the Yichun Coal and Metallurgical Bureau, Mao, deputy director of the city to inspect the city of Fengcheng 3 individuals (coalition) do coal mine and found that 2 wellbore The bamboo is woven into a circle of support, a wellbore without any support. In Fengcheng, a number of individuals (joint account) to do mine with bamboo shovel support well everywhere, but also a ...