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- The Simulation of the Top Coal Caving property of Hard Coal Seam 坚硬煤层顶煤冒放性相似模拟试验研究
- Selecting Coal Plow by Measuring Cutting Resistance in Hard Coal Seam 测试坚硬煤层截割阻力合理选型刨煤机
- Complex Dust Control Technique for Fully Mechanized Caving Face of Very-thick and Hard Coal Seam 特厚坚硬煤层综放工作面的综合防尘技术
- Cutting Resistance Test of Hard Coal Seam and its Difficulty Degree of Digging Research 坚硬煤层截割阻力的测试和可刨性研究
- STUDY ON KEY TECHNOLOGY OF FULLY-MECHANIZED SUB-LEVEL CAVING MINING FOR SPECIAL THICK AND HARD COAL SEAM 特厚坚硬煤层分层综放开采关键技术研究
- The research on the fractured blocks of the top-coal in the longwall top-coal caving technique of the hard coal seam 坚硬煤体综放开采顶煤破碎块度的研究
- Coal Weakening Treatment during Fully Mechanized Caving of Super-Thick Hard Coal Seam 坚硬特厚煤层综放开采过程中顶煤松动弱化处理
- Keywords caving coal technique;hard coal seam;block distribution;joint network;simplicial homology theory; 放顶煤开采;坚硬煤体;块度分布;节理网络;单纯同调理论;
- Talking about deep hole high prussure water injection in harder coal seam 浅析较坚硬煤层深孔高压注水
- Soft coal burns with more flames than hard coal. 烟煤燃烧时火焰较无烟煤多。
- Coal miners; coal seams; coal haulers. 煤矿工; 煤层; 运煤工
- hard coal seam 坚硬煤层
- Coal seams intermixed with iron ore. 煤层和铁矿混杂在一起。
- The caving of hard top coal of 4-2# coal seam in Tongchuan Jiaoping Coal Mining Area seriously impacts the production efficiency of the mine. 铜川焦坪矿区4-2%23煤层坚硬顶煤垮落破碎难题是严重影响矿井生产效益的"瓶颈"。
- The main key stratum that is made up of the hard stratum covering over the coal seam has a great influence on rock burst. 摘要煤层上覆坚硬厚层岩层组成的主关键层对冲击矿压的发生具有强烈的影响。
- The Gaussian curvature of No.3 coal seam in Qinshui basin is calculated. 计算了沁水盆地3号煤层的高斯曲率。
- Factors affected coal seam permeability change and its law is analyzed. 分析了煤层透气性变化的影响因素及变化规律。
- The outburst-proneness of 6# coal seam are studied with five indexes. 采用5种指标对该矿6%23煤层冲击倾向性进行了实验研究。
- Coal seams intermixed with iron ore . 煤层和铁矿混杂在一起。
- 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。
