• 无底柱60%。

    Short-hole shrinkage method without sill pillar occupies 60%.

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  • 依据煤层压显现特征给出埋煤层长壁开采工作面支架合理工作阻力安全界限确定方法

    Base on the weighing feature of the shallow coal bed, the specifying method of the support working resistance and safety margin is presented in the shallow coal bed.

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  • 采高液压支架针对上煤层基岩特定地质条件而研制一种高性能综采液压支架。

    The high mining height hydraulic support is designed for the special geologic condition of Shangwan Coal Mine, such as shallow buried depth, thin bed rock and thick aeolian sand.

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  • 叙述了堡子湾金多年应用的生产实践以及对采切工程的改进。

    The paper introduced shallow hole shrinkage stoping method that has been used in Baoziwan Gold Mine for many years.

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  • 通过地震分析认为现今构造应力场和断裂震等地质动力灾害发生控制作用

    According to the analysis of shallow earthquake in Beipiao mining area, the author conclude that modern tectonic stress field plays dominant role in occurrence of geo-dynamic disaster.

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  • 眉山市芒硝含钙量物晶体较大、埋藏、规模大为特点,目前采用洞室水溶法开采

    The Meishan mirabilite ores are characterized by high Ca content, large mirabilite crystalline, shallow occurrence depth and giant reserves.

    youdao

  • 根据厂沟金的开采技术条件选用了法回采

    According to the technical mining condition in Hua Changgou Gold Mine, the short hole shrinkage mining was chosen.

    youdao

  • 本文探讨孔留新型变形方案:留全面法、静态法、削壁法,以及这些方法的开采条件,采场主动支护回收等。

    The paper discusses the new options of short-hole shrinkage: all-over mining, static shrinkage, precipice shrinkage, rock mining conditions, active supporting and ore pillar recovery.

    youdao

  • 详述宝丰铅锌开采技术条件介绍了孔留应用存在的问题。

    The technical mining conditions of mineral deposit of Baofengshan Lead-Zinc Mine are stated in detail, some problems in application of shorthole shrinkage stoping introduced.

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  • 主要岩石变质碎屑,钠长碳酸盐角砾岩泥质

    The ore-bearing rock are mainly fine elastic rocks, breccia of albite-carbonate and carbonaceous- siliceous argillaceous rock.

    youdao

  • 平度市利用现有条件,因地制宜采用“三无”即底、间、扎留,收到了效果

    Based on the existing conditions, Pindu Municipal Gold Mine preferred short-hole shrinkage stoping without sill, intermediate and crown pillar to other mining methods and obtained excellent result.

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  • 石英岩体深部花岗斑岩为岩体。

    The shallow quartz porphyry is ore-bearing massif and the deep granite porphyry is ore-origimating one.

    youdao

  • 我国黄金理多缺少世界级大型,且普遍存在深度勘查滞后储量可靠程度差等问题。

    China is rich in types of gold deposit, but is short of world-class large size mine, and is faced with problems such as small prospection depth, lagged surveying and uncertainty of reserves.

    youdao

  • 通过现场实测,得出了对煤层高产高效工作面顶板来特征不同推进速度压显现规律。

    The field investigations show that ground pressure of coal face with high productivity depends on face advance rate.

    youdao

  • 具有多、均匀厚度稳定埋藏等特点

    The deposit shows such characteristics as rich orebody, uniform mineralization, less variable thickness and low embedded depth, etc.

    youdao

  • 孔留法对急倾斜薄开采一种有效的采方法具有高效低耗工艺简单等优点

    Short-hole shrinkage mining is an effective method for mining steep-thin veins, and it has advantages of high-efficiency and low-waste and simple technology.

    youdao

  • 通过焦家深部对比研究揭示新的规律部金床和深部之间间隔

    Some new gold metallogenic law be revealed by comparative study for shallow and deep gold deposits. There is ore-free interval or weak mineralized zone between shallow and deep gold deposit.

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  • 对于倾斜开采国内外最常用方法孔留法,实践表明,该法存在人工劳动强度大、贫化率高等缺点

    Through an exploratory survey of residual deposit in the sourthern zone of a copper ore mine, inclined thin veins with difficult occurrence and complicated mining conditions were discovered.

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  • 随着地表露头减少,地质勘查任务更多地是寻找隐伏深部边远地区产。

    Concealed ores, deep buried ores and the resources of the border area will be searched more than ever before with the decrease of outcrop ores and shallow ores,.

    youdao

  • 大冶露天采场山露天转地下项目重要工程采用进行开采。

    The hanging wall ore of the open-pit is one of important projects in transition from open pit to underground in Daye iron mine, and the shallow hole shrinkage mining method is adopted in the project.

    youdao

  • 大冶露天采场山露天转地下项目重要工程采用进行开采。

    The hanging wall ore of the open-pit is one of important projects in transition from open pit to underground in Daye iron mine, and the shallow hole shrinkage mining method is adopted in the project.

    youdao

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