东大山铁矿井下中深孔爆破参数的确定甘肃东大山铁矿陈永录东大山铁矿自１９５９年建矿后，曾先后两次由于各种因素干扰，被迫下马停产。１９９２年为了适应地方工业发展的需要，重新恢复了生产。避免重蹈覆辙作了挖潜改造，其中包括重新修正和确定井下中深孔爆破参数。１... Determination of parameters for medium-deep borehole blasting in Dongdashan iron mine. After the construction of the Dongsashan Iron Mine in Dongshan, Gansu, the Dashan Iron Mine has been disrupted twice due to various factors after it was built in 1959. In 1992 in order to meet the needs of local industrial development, resumed production. Avoid repeating the same mistakes made to tap the potential transformation, including the re-correction and determination of deep hole blasting parameters. 1 ...