摘要
针对阜新矿区清河门矿近距离煤层群实施上行开采的技术条件(采动影响系数2.7),综合应用理论分析、数值计算、相似材料模拟和现场探查等方法,对3-2煤采后3-3煤的连续性和完整性进行了研究,确定了下煤层开采后上煤层的结构变化特征,在此基础上确定了3-3煤上行开采巷道布置方案。实践表明,当上煤层位于下煤层开采的垮落带上方时,上煤层及其顶底板整体性遭到一定的破坏,但仍能保持连续性,随着下煤层开采后时间的流逝,煤层中形成的裂隙和断裂逐步"愈合",煤层的整体性得到改善,满足了开采所需的条件。
The research concerns the closed multiple seam ascending mining technology （mining in- duced influenced coefficient 2.7） of Qinghemen coal mine, Fuxin mining area. Theoretical analysis, numerical calculation, similar material simulating experiment and on-site exploration are applied com- prehensively in the integrity and continuity of 3-3 coal seam after the 3＇2 coal seam mined. Based on the stress state and structure variation of 3-3 coal seam, the roadway layout is designed. The 3-3 coal seam mining practice indicates that when the above coal seam lied on the caving zone of low coal seam, the integrity of the above coal seam could still maintain continuity and integrity, because the formation of cracks and fracture could gradually ＂healed＂, which improved the integrity of coal to meet the conditions necessary for mining.
出处
《采矿与安全工程学报》
EI
北大核心
2013年第1期63-67,共5页
Journal of Mining & Safety Engineering
基金
辽宁省教育厅科技研究项目(2009S047)
关键词
近距煤层群
上行开采
采动影响系数
现场探测
closed multiple seam
ascending mining
mining induced influenced coefficient
on-site exploration
