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- steep coal seams group 大倾角煤层群
- The example of the large dip angle and the coal seam group is the Yuexu area in Tangshan Mining Filiale. 大倾角、煤层群采煤设计以开滦唐山矿业分公司重点衔接区域岳胥区-680水平采区为设计对象。
- Study of floor water hazard controlling for steep A coal seam group mining 急倾斜A组煤层开采底板岩溶水水害防治研究
- Mining Practice in Steep Coal Seam under "Grey Hat" "灰帽"下急倾斜煤层采煤的实践
- steep coal seam with large inclined angle 大倾角急倾斜煤层
- A Caving Blast Test with a Detonating Fuse over the Tough Roof of a Group of Steep Coal Seams 急倾斜煤层群坚硬顶板导爆索爆破放顶试验
- Structural Analysis for Roof Movement for Steep Coal Seams 大倾角煤层采场顶板运动结构分析
- coal seams group at close quarters 近距离煤层群
- Keywords a group of steep coal seams;tough roof;squeezing explosion;short delay;ignition with a primacord;forced caving test; 急倾斜煤层群;坚硬顶板;挤压爆破;逐排微差;导爆索起爆;强制放顶试验;
- Research on strata behavior about hard roof steep coal seam 急倾斜硬顶中厚煤层开采矿压显现规律的研究
- coal seam group with close quarters 近距离煤层群
- coal seam group with near interval 近距离煤层群
- mining of closed distance coal seam group 近距离煤层群开采
- Ground pressure of top-coal caving face in difficult mining steep coal seams 急斜难采煤层水平分层放顶煤开采矿压研究
- NUMERICAL SIMUL ATION ON THE STABILITY OF OPENING IN STEEP COAL SEAM 急斜煤层巷道稳定性数值模拟
- Study on pressure behavior laws of blasting mining face in steep coal seam 大倾角炮采面矿压显现规律研究
- Keywords steep coal seam;exploitability;fuzzy comprehensive evaluation; 急倾斜煤层;可采性;模糊综合评价;
- Design on the caving of the large dip angle coal seam group 大倾角煤层群采煤设计初探
- Coal miners; coal seams; coal haulers. 煤矿工; 煤层; 运煤工
- Coal seams intermixed with iron ore. 煤层和铁矿混杂在一起。
