roof coal的例句大全

Accuracy of measurement of roof coal thickness by natural γ-ray sensor

天然γ射线顶板煤厚传感器的测量精度

The Technology Study of Roof Coal Presplitting in Thick Seam Caving Coal Mining

厚煤层放顶煤开采顶煤预裂技术研究

This paper introduces the course of the accident of drag-flight conveyer's jumping and sliding on the low-roof coal working face and the loss caused by it, analyzes the reasons of this accident, and puts forward some corresponding measures.

介绍了低位放顶煤工作面刮板输送机发生窜滑事故的工程及其造成的损失，分析了事故发生的原因，提出了相应的处理措施。

comprehensive control of spontaneous combustion of roof coal over mechanized coving gate and coal left in the mined area

综放顺槽沿空侧松散煤体及临面采空区遗煤自然发火的综合防治

Application of Unload Roof Coal Technology with Lightweight Hydraulic Support

轻型液压支架放顶煤技术的应用

Analyses factors that affect cover caving ability of roof coal in sublevel caving mining method.

分析了放顶煤开采顶煤冒放性的影响因素.

Development of the transition support for roof coal working surface in comprehensive mechanized coal mining

综采放顶煤工作面过渡支架的研制

Mechanical model for the elastic thick outrigger of roof coal is set up.

建立了顶煤弹性深梁力学模型,分析了顶煤应力分布及顶煤破坏形式.

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。

Influence of mining height of main roof on broken length The lime-stone rocks bed up against the coal.

采高对浅埋煤层老顶岩层破断距的影响石为岩层紧靠着煤矿层。

Research on Design on Powered Support for Thick Seam Mining with Soft Roof, Coal and Floor

三软厚煤层液压支架设计研究

The sliding phenomenon between coal seam and its roof or floor is very common.

煤层及其顶底板中滑动现象极为普遍。

New development for monitoring roof fall and identifying omen pattern in coal mine

煤矿顶板冒落监测与前兆模式识别新进展

The measures of anti-trundling support down under complex roof using blasting top-coal-caving

复合顶板炮采放顶煤支架防推措施

Dedusting mechanism by water-cloud of wetting agents and the relevant tests for fully-mechanized and roof caving coal face Don't put the unit in extremely hot or moist place.

综放工作面湿润剂喷雾降尘机理及高效降尘湿润剂的试验不要把话机故意放到温度高的或潮湿的地方。

Coal Roadway Support Technology under Cracked Combined Roof near Gob Area

近距离采空区下破碎复合顶板煤巷支护技术

Application of artificial neural network onthe cluster and identification of coal face roof

神经网络在采面顶板聚类及辨识中应用

A Caving Blast Test with a Detonating Fuse over the Tough Roof of a Group of Steep Coal Seams

急倾斜煤层群坚硬顶板导爆索爆破放顶试验

Development and Renewal of Metal Roof Bar of Coal Face

采面金属顶梁的发展及更新

Causes and measures of roof falls in high productive and efficient coal face

高产高效工作面漏顶原因分析及对策