金属矿山基建与采剥进度计划应具备哪些规范

       1 露天开采应遵循自上而下的开采顺序, 应分台阶开采,并应坚持“ 采剥并举,剥离先行”的原则。
       2 基建与采剥进度计划编制,应符合下列原则:
       (1)应减少基建剥离量、 缩短基建时间;
       (2)达产时间和投产规模应分别符合本规范第3.0.18和3.0.19条的规定;
       (3)应减少前期生产剥采比;
       (4)全期生产剥采比均衡有困难时,可分期均衡,分期均衡期应大于 5a,每期生产剥采比的变化幅度不宜过大;
       (5)开拓与备采矿量保有期应符合本规范第3.0.13条的规定;
       (6)编制采剥进度计划应以采掘设备能力为计算单元;
       (7)采剥进度计划应至少编制至投产后第5年末;分期开采的矿山应编制扩帮过渡期采剥进度计划。
       3 均衡生产剥采比,应符合下列规定:
       (1)当采用缓帮开采不能均衡生产剥采比时,应采用陡帮开采,陡帮工作帮坡角应在18°~35°范围内调整;
       (2)开采范围大、 生产年限长的矿山, 当采用单一陡帮开采难以均衡生产剥采比时, 宜采用分期开采或分期开采和陡帮开采相结合的方法;
       (3)分区开采的矿山, 宜通过剥采比高低搭配以均衡剥采比; 矿体走向很长的纵向开采的矿山,宜采用沿走向分区段不均衡推进以均衡剥采比。  
       4 陡帮开采扩帮时,每隔60m~90m高度,应布置一个宽度不小于20m的接滚石平台。
       5 露天开采矿山,损失率和贫化率应符合下列规定:
       (1)矿体赋存条件简单的矿床,损失率和贫化率不应超过5%;矿体赋存条件复杂的矿床,损失率和贫化率不应超过8%;
       (2)矿体分枝复合严重,贫化率和损失率宜经计算确定,当计算值大于 10%时,应采取低台阶采矿等措施。

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