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- coal seam with hard mining 难采煤层
- Top coal caving technology in high inclination-angled soft coal seam with hard roof and soft bottom 坚硬顶板软煤软底大倾角综放开采技术
- Research and Application of "one scoop and two obstacles" method in thin coal seam with hard and waste rock layers "一铲两挡"在含硬夹矸薄煤层中的研制与应用
- Treatment Method for Worked-out Area in Extraction of Steep Medium-thick Coal Seam with Hard Roof 急倾斜硬顶中厚煤层开采采空区处理方法研究
- The safety system of extremely thick coal seam is built and the extremely thick coal seam with coal bumping tendency in Qianqiu coal mine is extr... 在此基础上建立了适合义煤千秋矿巨厚煤层冲击地压防治的安全开采体系;成功地进行了巨厚煤层的综放开采;从而为有冲击倾向巨厚煤层的安全开采提供了成功范例.
- This article recommends a mining technology for thin coal seam with mixed mining,exceeding length and double unit face mining method innovated by Tianchen coal mine. 本文介绍了田陈煤矿创新的综采与普机采混合、工作面超长布置、对拉、旋转调采、矩形和梯形不规则形状的薄煤层开采技术;
- Gas drainage in high gassy coal seam with low gas permeability is always an hard solved significant technology problem in the process of safety production. 高瓦斯低透性煤层的瓦斯抽放,一直是煤矿安全生产过程中的重大技术难题。
- The movement of top coal and top roof is discussed with the data observed from the caving mining of deeply inclined thick coal seam with horizontal section in Zhaogezhuang colliery of Kailuan Group. 就开滦集团赵各庄矿在急倾斜厚煤层采用水平分段开采过程中的现场观测，探讨顶煤和顶底板运移。
- To solve strata pressure control of shallow coal seam with thick sand and thin bedrock, in-situ observation was carried out in Baoshan mine 6101 fully mechanized coalface, which is the first coalface. 摘要为解决厚砂层薄基岩浅埋煤层矿压控制问题，对宝山煤矿6101综采工作面（首采）进行现场实测。
- The main coal seam of Taiping colliery is 11~# coal seam with a thickness of 1.5 m. 太平煤矿主采11%23煤层;煤厚1.;5 m
- The measures that should be adopted in water-pouring for coal seam with worse penetrability, hygroscopicity and wettability are expounded. 阐述了对渗透性、吸水性和湿润性较差的煤层进行注水时应采取的措施。
- The equation for methane storage and migration in compressible coal seam with double pores and the numerical analogue method were set up. 建立了双重孔隙、可压密煤层甲烷储运方程和数值模拟方法，模拟结果表明，解吸时间控制吸附甲烷的涌出。
- We confronted him with hard facts. 我们把铁的事实摆在他的面前。
- Practices on fully mechanized coal mining in deep inclined seam with hard roof, soft coal and soft floor 坚硬顶板、软煤、软底大倾角煤层综采开采实践
- Many modelling results have showed that the resistivity curves reflect obviously the variation of coal thickness,which are enabled to measure the coal seam with the thickness mors than 0 8m. 结果表明，电阻率曲线对煤厚变化反映明显，能探测厚度大于0．8m的煤层。
- Mining high gas coal seam with enclosed mining method 封闭式采煤法开采高瓦斯煤层
- Numerical simulation was conducted using UDEC3.0 for the movement of overlaying strata and fracture development caused by the mining of upper protective layers of coal seams with close quarters. 本文利用UDEC3.;0软件对近距离上保护层开采导致的覆岩移动及裂隙发育过程进行数值模拟。
- I can't open the door with hardness of stone. 我不能打开那扇石门。
- The valley is seamed with small streams of water. 山谷里布满小溪。
- She was treated with hard measure by her friend. 她受她的朋友们的虐待。
