摘要
采用实测和实验模拟方法,就松散承压含水层下薄基岩采场压架事故的机理与防治进行了深入研究.结果表明:直接赋存在基岩顶界面上的松散承压含水层的水位在采场压架时迅速下降,证明松散承压含水层下部的基岩是整体破断下沉的.由于松散承压含水层的载荷传递作用,导致薄基岩条件覆岩关键层易产生复合破断,引起基岩的整体破断和砌体梁结构的滑落失稳.这是造成华东矿区部分矿井在邻近松散承压含水层开采时工作面发生压架事故的根本原因.最后提出了松散承压含水层下薄基岩采场压架防治对策.
On the basis of measurements in site and physical simulations, the mechanism of supports crushing accident and its preventive measures during coal mining under the unconsolidated confined aquifer with thin bedrock were studied. The research results indicate that the water level of the unconsolidated confined aquifer above the bedrock drops very fast as the supports crushing accident happen, which proves that the bedrock under the unconsolidated confined aquifer broken as a whole. Due to the effect of load transfer of the unconsolidated confined aquifer, on condition of unconsolidated confined aquifer and thin bedrock, the adjacent key strata are prone to compound breakage, leading to the bedrock broken as a whole and sliding instability of the overlying structure. This is the fundamental source for the supports crushing during coal mining under the unconsolidated confined aquifer in East China. Related preventive measures were put forward to serve as the guidance for the 7114 working face of Qidong colleiry.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2007年第12期1239-1243,共5页
Journal of China Coal Society
基金
国家重点基础研究发展计划(973)资助项目(2007Cb209400)
国家自然科学基金重大项目(50490273)
教育部新世纪优秀人才支持计划资助项目(NCET-05-0478)
关键词
松散承压含水层
薄基岩
关键层
复合破断
压架事故
unconsolidated confined aquifer
thin bedrock
key stratum
compound breakage
fully mechanized supports crushing accident
