stiff coal

用法例句

The paper introduces how to select coal plow in accordance with measuring cutting resistance of the machine in hard coal seam and analysing the result.

以坚硬煤层截割阻力的测试,结合全自动刨煤机在大同煤矿集团公司晋华宫矿坚硬煤层成功开采之例,进行坚硬煤层截割阻力的测试和可刨性效果分析,选择合理的刨煤机。

Cutting resistance test of hard coal seam and the analysis of its difficulty degree of digging were introduced in this paper with an example of full-automatic slicer successfully used in the mining of hard coal seam in Jinhuagong Colliery of Datong Colliery Group.

以全自动刨煤机在大同煤矿晋华宫矿坚硬煤层成功开采为例,简述坚硬煤层截割阻力的测试和可刨性效果分析,提出建立和制定我国煤层截割阻力测试的方法和规范建议。

The paper mainly applied the theory of fracture mechanics to deduce the formular of the minimum water pressure, analyzed the influcential factor which had influcence upon water infusion pressure in the steep hard coal seam, and revealed the relationship between water infusion pressure and coal seam pitch and depth.

主要运用有效应力原理及断裂力学推导了煤层注水所需的最小注水压力,初步探讨了多组裂隙同时存在对煤层最小注水压力影响的计算方法,并分析了影响倾斜坚硬煤层注水压力的因素,指出了注水压力与煤层倾角及埋藏深度之间的关系,其理论结果与现场相符。

Technology Application Study on Hydraulic Pressing in Coal Face of Medium Hard Seam

中硬煤层采煤工作面水力压挤技术应用研究

lignite - tar pitch

褐煤柏油脂, 褐煤硬沥青

a hard wax obtained from lignite.

取自褐煤的一种硬蜡。

coal is a hard black material; wheat is the stuff they use to make bread.

煤是一种硬的黑色原料。

Research on Equipments Coordination for Shearer in Soft Coal Thin Seam with Hard Roof

硬顶软煤薄煤层滚筒采煤机设备配套研究

Compression and hardening over long periods of time, the processes by which coal is formed from plant materials.

煤化作用经过长期压缩和硬化，植物成煤的过程

Study on Technology of Hard and Thick Top-coal Weakening in Fully Mechanized Caving Faces in Binchang Mining District;

彬长坚硬厚煤层综放开采顶煤弱化技术研究

Plowability of plow mining on thin and soft coal seam with hard roof

坚硬顶板松软薄煤层刨煤机开采可刨性研究

Research on the Top Coal Caving and Drawing Characteristics of Caving Roof Coal Mining for Shallawly Buries and Hard-Thick Coal Seam;

浅埋藏坚硬特厚煤层放顶煤开采顶煤冒放性研究

a hard natural coal that burns slowly and gives intense heat.

一种硬质的天然煤，燃烧缓慢，热度强。

Cemented carbide for coal-mining tools

GB/T14445-1993煤炭采掘工具用硬质合金制品

Rapid Construction Technology for Auxiliary Shaft in Super-thick Hard Rock in Babao Mine

八宝煤矿副井超厚硬岩快速施工技术

Application of EBZ200H Hard Rock Boring Machine in Peigou Coal Mine

EBZ200H硬岩掘进机在裴沟煤矿的应用

Study on the Reasonable Retainning of the Waterproof Coal Pillar of Steep Medium & Thick Coal Seam with Hard Roof;

急倾斜坚硬顶板中厚煤层防水煤柱合理留设研究

Research on the Tunnel Supporting and Propriate Coal Wedre Preserving under the Provide of the Upper Plate of Qiling Coal Mine;

七岭煤矿坚硬顶板条件下巷道支护及合理煤柱留设研究

Study on Key Technologies of Reasonable Mining in the Condition of Soft Coal, Thick-hard Roof and Contiguous Seams;

软煤、厚硬顶板、极近距离煤层合理开采关键技术研究

Research on Mining Method in Shallow and Adamancy Coal Seam of Xiegou Coal Mine in Xingxian Area

兴县矿区斜沟煤矿浅埋深坚硬厚煤层开采方法研究

Research on the rock burst mechanism of coal tunnel wall being pushing out overall in Datong coal mining area′s "three hard" coal roadway

大同矿区“三硬”煤层巷道煤壁整体推出型冲击地压发生机理的研究