1) hard top coal and roof seam
两硬煤层
3) hard coal seam
坚硬煤层
1.
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。
2.
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。
3.
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。
4) hard coal level
煤层硬
5) hard seam
坚硬煤层
1.
These are obviously different from those of the commonly soft or medium-hard seam fully mechanized caving feces.
分析认为,坚硬煤层综放工作面存在剧烈矿压显现的根本原因是顶煤传递顶板压力的能力较强,以及顶板存在的大、小结构的特征。
2.
Base the seam conditions of hard, density, undeveloped joints and cracks, and 16 m average thickness, with the pre-comprehensive weakening technology and the mining technology study of the coal mining face, the difficult issue of the fully mechanized high top coal caving mining in hard seam has been overcame with a safe and high efficient production.
针对坚硬致密、节理裂隙不发育、平均厚度 16m煤层的赋存特点 ,通过对顶煤预先综合弱化技术和工作面回采工艺的研究 ,攻克坚硬煤层大放高综放开采技术难题 ,实现安全、高效生产 ,提高了矿井经济效
6) hard thick coal seam
硬厚煤层
1.
Intenerating technique of top coal in fully mechanized top coal caving hard thick coal seam;
硬厚煤层综放开采顶煤弱化技术研究
补充资料：硬煤
1.方言。即无烟煤。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条