共查询到14条相似文献,搜索用时 78 毫秒
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介绍了新桥硫铁矿60万t/a坑采一期工程主要采矿方法-分段空场嗣后一次充填采矿法,并对其应用情况进行了评价。提出了降低采矿成本的途径。 相似文献
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通过剖析现有缓倾斜中厚矿体常用的底盘漏斗法或房柱法存在的问题,提出了有别于传统采矿方法的圆柱拉底空场法和长柱拉底空场法。 相似文献
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新浦磷矿针对-320 m中段厚大矿体,采用低分段分层凿岩深孔矿房法采矿,取得了较好的经济效益,介绍了该采矿方法的实施情况. 相似文献
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针对瓮福磷矿磨坊矿段缓倾斜中厚矿体开采后所产生较大沉降的问题,提出采用点柱式充填开采的方法,并对其进行数值模拟验证。通过对充填与未充填两种情况的数值模拟结果可以发现,点柱式充填开采方法能有效控制上覆岩层沉降,同时也合理地处理了采空区,保证了生产的安全。 相似文献
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缓倾斜矿体开采受多种因素制约,针对其赋存特征可采用多种采矿方法.基于决策者偏好信息和价值断,利用ELECTRE-Ⅱ算法模型构造各备选采矿方法不劣于关系的强弱关系图;采用指数效用函数,对影响缓倾斜体开采因素进行无量纲化,能精确地刻画各因素在不同水平下的变化差异,进而提高了各采矿方法的不劣于关系的精度,更好地反映其优劣差异程度.结合实际案例分析,在缓倾斜矿体采矿方法选择中,基于指数效用函数的ELECTRE-Ⅱ算法科学可靠,适用性较强. 相似文献
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为了提高生产效率,琅琊山铜矿将原有的无底柱上向分层充填采矿工艺改为有底柱上向分层充填采矿工艺,与原有的充填开采工艺比较,改进后的充填采矿工艺避免了在矿块前期拉底及后期顶柱回采时的大量投入,提高了回采效率,取得了较好的经济及社会效益,为此类矿体的高效回采提供了借鉴经验. 相似文献
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根据矿体赋存条件,开磷集团用沙坝矿对缓倾斜矿体采用胶结充填采矿法开采,取得了一定效果,提高了矿产资源回收率,减少资源损失,围岩崩落和地表下沉情况得到控制,延长了矿山开采年限,实现地表固体废弃物综合利用,取得了较好的社会效益和经济效益. 相似文献
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A review on the mechanical and electrical properties of graphite and modified graphite reinforced polymer composites 总被引:1,自引:0,他引:1
Rajatendu SenguptaMithun Bhattacharya S. BandyopadhyayAnil K. Bhowmick 《Progress in Polymer Science》2011,36(5):638-670
Carbon materials particularly in the form of sparkling diamonds have held mankind spellbound for centuries, and in its other forms, like coal and coke continue to serve mankind as a fuel material, like carbon black, carbon fibers, carbon nanofibers and carbon nanotubes meet requirements of reinforcing filler in several applications. All these various forms of carbon are possible because of the element's unique hybridization ability. Graphene (a single two-dimensional layer of carbon atoms bonded together in the hexagonal graphite lattice), the basic building block of graphite, is at the epicenter of present-day materials research because of its high values of Young's modulus, fracture strength, thermal conductivity, specific surface area and fascinating transport phenomena leading to its use in multifarious applications like energy storage materials, liquid crystal devices, mechanical resonators and polymer composites. In this review, we focus on graphite and describe its various modifications for use as modified fillers in polymer matrices for creating polymer-carbon nanocomposites. 相似文献