roof coal的例句大全

The Design of the System to Moniter the Roof Abscission Layer under the Well of the Coal Mine

煤矿井下顶板离层位移检测系统的设计

The design of light-duty roof caving coal hydraulic support equipped with flat tramcar

轻型放顶煤液压支架配套平板车设计

Safety Mining Feasibility and Coal Face Support Control under Main Roof of Thick Igneous Rock

厚层岩浆岩老顶下安全回采的可行性及支护控制

Roof Trend and Control of Thin Coal Seam Face

薄煤层普采工作面顶板动态及其控制

Hard roof in control and practice high ranking conventional coal mining face

高档普采工作面坚硬顶板控制与实践

Investigation on Predicting Roof Water Gush in Coal Mines Based on Multi-Factor Analysis

基于GIS复合分析的煤矿顶板水害预测研究

The method of improving unit output at roof clasping coal face with π type steel beam

提高π型钢梁放顶煤工作面单产的途径

Apply the Orthogonal experiment to ratio of the model material, set up the model and observe to determine the pressure step pitch of the coal seam and the top roof and baseboard, so as to analyze the pressure law.

采用正交实验法进行模型材料的配比，之后建立模型，观察，确定综放工作面煤层及顶底板的来压步距，并对其来压规律进行分析。

Discussion on law of roof cranny water storage in Yuejin Coal Mine

跃进煤矿顶板裂隙水赋水规律研究

Methane excessive limit in upper corner angle area is a major problem during roof-coal-caving operation, when it is difficulty to lay out specialized methane discharging roadways in thinner coal seams, besides using E ventilation mode, vertical roof boreholes are used to discharge methane.

上隅角瓦斯超限是放顶煤开采遇到的主要安全问题，除采用E型通风方式外，在较薄煤层布置专用瓦斯排放巷困难时，可以采用顶板纵向钻孔抽排瓦斯。

Development and Renewal of Metal Roof Bar of Coal Face

采面金属顶梁的发展及更新

In the high scale seismic profile after the wavelet transform the roof and floor reflection events of the coal bed can be distinguished clearly, Which is invigorative in coal thickness interpretation.

在小波处理后的高尺度地震剖面上可以清晰地分辨煤层顶、底板反射波，对于煤层厚度的解释具有重要的参考价值。

Influence of Geological Conditions on Roof Stability at Coal Face

地质条件对回采工作面顶板稳定性的影响

The size of the support force of the dense prop increases with the increase of thickness of the coal seam, the roof press is borne mainly by the dense prop.

密集柱支撑力的大小随煤层厚度增加而增大，顶板压力主要由密集柱承担；

The successful development increase the fully mechanized coal face roof safety monitoring studies, and shorten the time to write the report, so it has played a very good analysis of the auxiliary role.

该软件的成功开发，加深了综采工作面顶板安全监测的研究，缩短了书写报告的时间，起到很好的辅助分析作用。

The Litho logy and combination of coal roof are determined by the changes of sedimentary environment. Different sedimentary environment have different coal seam roof stability.

煤层顶板的岩性及组合是由沉积环境变化所决定的，沉积环境不同会造成煤层顶板稳定性的明显差异。

An theoretic method to calculate roof stress of coal floor

煤层顶板应力的一种理论计算方法

According to coal wall front force of support and workface support stress movement transformation relations, the main roof cycle pressure can be accurately forecast.

根据工作面煤壁前方支承压力和工作面支架受力之间的运动转化关系，可准确预报工作面老顶的周期来压；

A discussion is made on the technical renovation in the fields of arch structure, heat-resistant mat reinforcement, refractory of both arch and roof, and fixed mode of shelf rest for skimmer in the coal-fired chain-grate boiler with evaporation capacity of 35t/ h.

对蒸发量为35t/h的燃煤链条锅炉的炉拱结构、耐热钢筋网，炉拱、炉顶耐火材料，挡渣器搁座的固定方式的技术改造进行了探讨。

At the extent of 55 °≤δ≤ 70 °, maximum shear stress of closer empty element rock mass is all less than compressive strength of coal bed roof and floor plate mudstone including shale interlayer.

在55°≤δ≤70°范围内，煤层开采临空单元岩体最大剪应力皆小于煤层顶、底板泥岩夹页岩的抗压强度，其屈服接近度也大多小于10。