coal seam

• Application of plough in thin coal seam face
  刨煤机在薄煤层工作面中的应用
• Brief analysis on looking for fault - wring coal seams
  浅析断失翼煤层的寻找
• Infusion test in coal seam and its effect analysis
  煤层注水试验及效果分析
• Rock bolting support technology for loose coal seam
  松散煤层锚杆支护技术
• Solid mineral fuels - guidance on the sampling of coal seams
  固体矿物燃料.煤层取样指南
• Making contrast of coal seam with logging curve
  利用测井曲线进行煤层对比
• Mining method under coal pillar in close distance coal seam
  近距离煤层煤柱下的开采方法
• Possibility of mining coal seam under villages
  煤矿村庄下压煤可采性分析
• Evaluation of exploration on coal seam gas
  有关煤层气勘探评价的若干问题
• Application of air bag support in taiyuan thin coal seam
  气垛支架在太原组薄煤层中的应用