大倾角松软煤层综放面实现高产高效的关键之一是端面顶煤稳定性控制。
Stability control of the head faces top-coal is one of the key techniques of realizing high production and high efficiency to coal mining in fully mechanized top-coal caving face.
南屯煤矿深部松软煤层巷道，在掘进过程中顶板破碎，伴有大量顶煤冒落且围岩破坏严重。
During the initial excavation, the tender coal seam workings in deep seam in Nantun Colliery takes on slocking of roof, with breaking-out in bulk coal and surrounding rock failure.
巷道在掘进时由于受断裂构造的影响，瓦斯含量大，应力集中，煤体松软、破碎，掘进困难。
Because of crack structure, high gas amount, concentrated stress, soft and broken coal, it's very difficult for tunneling.
应用推荐