摘要
介绍了矸石充填协同垮落式综采技术原理,采用物理模拟方法研究了不同充实率条件下协同综采面覆岩非对称变形特征,揭示了协同综采面过渡区域覆岩倾向砌体结构及其形成机理;通过FLAC3D数值模拟方法,分析了协同综采面过渡区域矿压显现影响特征,研究结果表明充实率和充垮比因素影响过渡区域应力集中现象显著,但对过渡区域高应力影响范围影响较小,不同条件下过渡区域高应力影响范围均小于6 m。基于实验和数值分析结果,提出了在协同综采面过渡区域6 m高应力影响范围内,根据应力集中程度适当提高过渡区域支架支护强度矿压控制对策。矿压实测数据显示平煤十二矿己15-31010协同综采面过渡区域矿压控制效果良好,过渡区域矿压控制对策合理可行。
The paper briefly introduces the technical principles of backfilling collaborating with the caving fully-mechanized mining. Using the physical simulation method, it is to study the asymmetric deformation characteristics of strata movement under different compressed ratio conditions and reveals the masonry structure and its formation mechanism in transition area of a collaborative mining working face. The paper studies the characteristics of strata behavior in transition area of collaborative mining face by numerical simulation. The results show that the compressed ratio and fulling and caving length ratio have an obvious effect on stress concentration in transition area but have less effects on influence range. The high stress influence range is less than 6 m under different mining conditions. It proposed the mine pressure control countermeasures that appropriately improve support strength of hydraulic based on the degree of stress concentration within 6 m in transition area of a collaborative mining face. Field measured data shows that the pressure control in Ji15-31010 collaborative mining face of Pingdingshan No. 12 colliery mine is good in transition area. The mine pressure control measures of transition area isreasonable and feasible.
出处
《采矿与安全工程学报》
EI
CSCD
北大核心
2018年第1期86-93,共8页
Journal of Mining & Safety Engineering
基金
国家自然科学基金青年科学基金项目(51704273)
中国博士后科学基金项目(2016M601915)
关键词
协同综采
矸石充填
过渡区域
矿压显现
collaborative mining
gangue backfilling
transition area
strata behavior
