【摘要】 实践表明 ,综放工作面的矿压显现并没有如人们所预计的那样会明显增加 ,反而表现为周期来压不明显 ,或是来压周期缩短 ,来压强度降低 ;液压支架的实际支撑力不增加或有所降低 ;架前端面冒顶现象增加等 .从这些现象出发 ,对综放工作面支架 -围岩关系的特征、支架如何适应综放开采岩层控制的要求等问题进行论述 .更多还原

【Abstract】 The ground behaviors dont increase seriously in longwall top coal caving faces as mining engineers thought. On the contrary, there are many relaxed behaviors, such as decrease of resistance, decrease of periodic roof pressure, decrease of periodic caving distance, increase of caving in end face, etc. In order to explain these questions, the characteristics of relationship between support and surrounding rock are discussed.更多还原