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- nature of roof rock strata 顶板岩性
- One of the crucial elements influencing the rock burst is the structure of roof rock stratum, especially the flinty and thick sandstone roof over the coal seam. 顶板岩层结构,特别是煤层上方坚硬、厚层砂岩顶板是影响冲击矿压发生的主要因素之一。
- Effect of Faults on Movement of Roof Rock Strata in Gateway 断层附近回采巷道顶板岩层运动特征研究
- During mining, the stress behaviors of workface are very obvious.Thin rock strata of roof fall by full thick, procreant cranny reach the earth's surface and have clearly sidesteppedsubsidence. 在回采过程中，工作面矿压显现比较明显，顶板基岩沿全厚切落，产生的裂隙通达地表并有明显的台阶下沉。
- During mining, the stress behaviors of workface are very obvious.Thin rock strata of roof fall by full thick, procreant cranny reach the earth's surface and have clearly sidestepped subsidence. 在回采过程中，工作面矿压显现比较明显，顶板基岩沿全厚切落， 产生的裂隙通达地表并有明显的台阶下沉。
- The rock mass structure can be expressed by rock stratum effect thickness influence coefficient. It is more scientific then using roof rock and sand content in the study of coal seam gas preservation. 研究表明,煤层围岩岩体结构控制了煤层瓦斯的赋存,岩体结构可用岩层效应厚度影响系数来表示,应用这一参数研究煤层瓦斯赋存比用煤层顶板岩性及含砂率更科学。
- From whole to blocky and heavily fractured structure, the abutment stress ahead of working face reduces and the peak value of abutment stress migrates to inside of roof rock mass. 过断层后，顶板岩体中支承压力减小，比无断层存在的情况要低。由于顶板岩体中节理发育程度的不同，顶板岩体变形破坏规律和矿压分布各异。表现为由完整到块裂和碎裂结构，老顶的初次垮落步距、周期垮落步距和冒裂带高度均随着岩体破坏程度的增强而减小；顶板岩体中的支承压力亦由大到小变化，且支承压力峰值位置随着岩体破坏程度的增强向顶板岩体内部转移。
- He knows nothing of the nature of my work. 他一点也不了解我的工作性质。
- Control Principle of Separating and Broken Roof Rock Strata in Roadway 离层破碎型煤巷顶板的控制原理
- Her sad looks reflected the nature of her thoughts. 她面带忧伤显出心事重重。
- Chemists study the nature of gases. 有的化学家研究气体的性质。
- He can't apprehend the real nature of change. 他不能理解变革的真实性质。
- Gas Management Technology of Roof Rock Boreholes 顶板岩石钻孔抽放治理瓦斯技术
- Lashing velocity of pump is concerned with nature of air. 泵的抽气速率与气体的性质有关。
- Determination of roof rock character and strata structure in roadway supported by bolting with wire mesh 煤巷锚网巷道顶板岩性及岩层结构的确定
- Relating to or of the nature of fermentation. 有关于发酵本质的或发酵性的
- displacement pressure of roof rock 盖层排驱
- His poems participate of the nature of satire. 他的诗带有讽刺性。
- Research on Rationally Arranging Position of Horizontal Boreholes in Roof Rock Stratum 顶板岩层水平长钻孔合理布孔层位的研究
- In her talk she went into the nature of imperialism. 她在报告中探讨了帝国主义的本性。
