期刊论文

Water burst mechanism of "divided period and section burst" at deep coal seam floor in North China type coalfield mining area

中文

煤炭学报

Meitan Xuebao/Journal of the China Coal Society

0253-9993

2015

40

7

1601-1607

10.13225/j.cnki.jccs.2015.0358

国家自然科学基金资助项目(41272276,51174289)； 教育部创新团队基金资助项目(IRT1085)；

本校为第一机构

通过对华北型煤田大采深高承压水和下组煤开采条件下10起较典型的煤层底板承压突水实例进行深入系统分析,基于时空4维结构概念,首次提出了"分时段分带突破"的煤层底板突水机理。从空间上即上组煤2号主采煤层至煤系基底奥灰强含水层之间,以薄层灰岩含水层为界分4个隔水地质单元,以因采动影响而产生的各种破坏损伤及原始导升裂隙带等按阻水能力为界划分11个阻水"分带",并建构了6种突水模式;从时间上按煤层底板渗水及突水通道形成进程划分4个"时段";在此时空概念基础上运用地质结构力学、水动力学、线性断裂岩石力学和非线性系统动力学等进行了相关实验及综合分析,给出了相应时段的煤层底板突水判据...

Through the analysis on 10 typical examples of coal seam floor confined water burst in large depth confined water and lower coal group in North China type coalfield mining area, based on time space 4D structural concept, a water burst mechanism of "divided period and section burst" at coal seam floor was put forward. In terms of space, four water geological units were divided by thin limestone aquifer between No. 2 coal seam of upper coal group and Ordovician strong aquifer at coal series basement, 11 water resisted sections were divided based on various damages caused by mining operations and...