| 1. | Working resistance and safety margin of long - wall support in shallow coal bed
浅埋煤层长壁开采支架阻力及安全界限 |
| 2. | Testing study on 3d similar material simulation for shallow coal seam mining
浅埋煤层开采三维相似材料模拟实验研究 |
| 3. | Numerical simulation of the air leakage in the bedding plane of gob in shallow coal seam
浅煤层采空区层面漏风的数值模拟分析 |
| 4. | Numerical analysis on movement rule of overlying strata of shallow coal seam covered with thin bedrock
浅埋煤层开采覆岩移动规律数值分析 |
| 5. | Analyzing falling crack failure of overburden strata of shallow coal seam and its control method
浅埋煤层覆岩切落裂缝破坏及控制方法分析 |
| 6. | Combinatorial key stratum is the development of key stratum in shallow coal seam , it has the all properties of key stratum and itself ’ s property
摘要在分析组合关键层有关参数的基础上，推导出了组合关键层初次来压步距和周期来压步距的计算公式。 |
| 7. | Because the loader and the moduls of elasticity exists part difference in key stratum and combinatorial key stratum , and the formulae of calculating the roof weighting step has difference , so there must be existing big error if we use the formulae of key stratum to calculate the shallow coal seam ' s weighting parameter
大柳塔1203工作面按照关键层计算得出的顶板来压步距与实际相差很大，而按照组合关键层计算得出的顶板来压步距与实际基本吻合。 |
