1、

BIock caving is a high-effeciency underground mining method.

自然崩落法是一种高效率的地下采矿方法.

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2、

As increasing of mining depth, advancing of outputs of a single working face and changing of geological conditions, the disallowed gas concentration appears frequently at longwall top coal caving face in Lu' an mining district, blocks the farther advancing of producing level.

随着采深加大、工作面单产的提高及地质条件的变化,潞安矿区综放工作面瓦斯超限频繁,严重制约了综放集约化生产水平进一步提高。

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3、

I guess it is a sign that they don't have to worry about heavy snowfall caving in the roofs.

我猜这也许是人们不需要担心在屋顶有很多积雪的一种象征吧。

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4、

The distribution patterns of mechanical characteristics for surrounding rock in the gateways of fully mechanized top-coal caving ( FMTC) face were put forward by analyzing deep displacement, surface displacement, stress distribution and supports loading.

通过对综放面回采巷道围岩的深部位移、表面位移、应力分布以及支架荷载的实测分析,得出综放面回采巷道围岩力学特征分布规律。

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6、

There is a certain angle between caving line and coal seam strike.

垮落线与煤层走向是一定角度。

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7、

These results can be used as theoretical basis for design and practice of block caving.

为自然崩落法的设计与实施提供理论依据。

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8、

Theory and practice of sub-level caving method in China

我国放顶煤开采的理论研究与实践

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9、

Ore-Draw theory and application for block caving system

阶段自然崩落法放矿理论研究与应用

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10、
11、

Development of reliability simulation software for fully mechanized caving system with parallel operation

平行作业综放系统可靠性模拟软件的开发

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12、

Study on the Basic Theory of Longwall Top Coal Caving System

关于长壁放顶煤开采基础理论的研究

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13、

Optimized imitation for the process system of long wall mining with caving method

综采放顶煤工艺系统的优化仿真

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14、

The ore-drawing computer control in caving method s

自然崩落采矿法计算机放矿控制技术

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15、

Knowledge of sub level caving method to control underground impact pressure

放顶煤开采对控制冲击地压的认识

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16、

Application and evaluation of natural caving method in China

国内自然崩落法的应用和评价

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17、

Study on recovery of ore-bearing overburden layer formed by caving method

崩落法矿山含矿覆盖层回收研究

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18、

Numerical simulation on disposal of abandoned stopes by means of ore pillar caving

矿柱崩落法处理采空区的数值模拟

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19、

It is found that the ore block caving can be predicted accurately.

结果表明:该模型能较好地预测矿体的崩落;

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