A digital simulation is made to the rock pressure distribution of faces with large mining height when crossing gob, which may guide engineering practice.
针对大采高工作面过空巷时的矿山压力分布进行了数值模拟，以掌握其分布规律，从而对工程实践提出指导性意见。
The lag distance of abutment pressure behind working face increases, but the convergence coefficient of vertical stress doesn't change obviously with the increase of mining height.
分层开采与综放开采工作面滞后支承压力变化规律是，随着采高的增大，工作面滞后支承力的距离加大，垂直应力集中系数差别不大。
Many mines or mining city in China are faced with many problems, such as severe environment pressure and exhausting resources etc.
我国许多矿山或矿业城市面临严重的环境破坏和资源枯竭问题。
Fault impact pressure is a dynamical phenomenon caused by coal mining, with fault abruptly dip offset, and stretch strain energy rapidly release.
断层冲击矿压是由于开采活动引起的断层突然相对错动、弹性应变能迅速释放的动力现象。
By analysing the geologic conditions and appear law of mining pressure for tunnel, combine support theory with practice, points out the reasonable and science support forms.
通过对巷道的地质情况、矿压显现规律进行了详细分析，结合支护理论和现场实践，提出了科学合理的支护方式。
Based on in situ measurement with sub-level caving mining, the characteristics of top-coal deformation and top-coal deformation vs abutment pressure are mainly discussed.
以放顶煤开采现场实测为基础，着重探讨了顶煤的变形特征、顶煤变形与支承压力的关系；
Successful predicting and controlling technology for safety mining coal on the aquifer with high-pressure are provided.
为深部煤层高承压含水层上安全开采提供了一套较成功的预报和控制技术。
It is straightly faced with the high water pressure, the high gas and stress along with the mining depth increasing continuously, which is increasingly outstanding.
而随着矿井采掘深度不断加大，其直接面临的“三高”问题，即高水压、高瓦斯、高地应力问题日益突显。
Author introduces the structure and the working principle of the secondary dust removal device with negative pressure as well as the application to fully mechanized mining face in Shuoli colliery.
介绍了综采割煤二次负压降尘装置结构、工作原理以及在朔里煤矿综采工作面使用情况。
Main product has fork-lift truck of grab of lorry of type of fork-lift truck, join with a hinge, hydraulic pressure, land leveler, mining and slippage fork-lift truck to wait.
主要产品有装载机、铰接式卡车、液压挖掘机、平地机、挖掘装载机和滑移装载机等。
The research result shows that longwall mining method with hydraulic pressure frame supporting capping rock is the optimal mining proposal for the gently inclined and extremely thin iron mine.
研究证明，液压护顶长壁法是开采缓倾斜极薄类铁矿床最优的采矿方法。
The research result shows that longwall mining method with hydraulic pressure frame supporting capping rock is the optimal mining proposal for the gently inclined and extremely thin iron mine.
研究证明，液压护顶长壁法是开采缓倾斜极薄类铁矿床最优的采矿方法。
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