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安监总管一[2011]116号各省、自治区、直辖市及新疆生产建设兵团安全生产监督管理局,有关中央企业:2011年7月10日,山东省潍坊市昌邑正东矿业有限公司盘马埠铁矿发生重大透水事故,造成井下当班31名作业人员中有24人被困。该矿2005年7月开始建设,2009年2月取得安全生产许可证,设计开采能力10万吨/年。经初步分析,该矿没有按照设计要求对历史上遗留的地表露天采坑进行填平处理,违规向露天采坑内排放尾矿,违规开采保安矿柱,造成保安矿柱远小于设计尺寸,致使保安矿柱冒落,露天采坑中的尾矿
Safety Supervision Administration of a [2011] 116 provinces, autonomous regions and municipalities directly under the Central Government and Xinjiang Production and Construction Corps Safety Supervision and Administration, the central enterprises: July 10, 2011, Weifang City, Shandong Province Changyi Zhengdong Mining Co., Ltd. Panma There was a major flooding accident in the iron mine, causing 24 of the 31 workers on duty in the mine to be trapped. The mine started construction in July 2005 and obtained a safety production license in February 2009 with a designed mining capacity of 100,000 tons / year. After a preliminary analysis, the mine failed to fill in the surface open pit left over from history in accordance with the design requirements, discharging tailings illegally into the open pit and mining the security pillar irregularly, resulting in the security pillar being much smaller than the designed size, resulting in the security Pillar collapse, open pit mining tailings