摘要
为了研究回采工作面上覆岩层裂隙演化规律,找到采场瓦斯富集区,为高效抽采瓦斯提供理论依据,以潞安集团常村煤矿N3-8工作面回采为工程背景,采用理论分析、FLAC3D数值模拟和仰孔分段注水现场观测方法,研究不同回采长度下的上覆岩层裂隙发育规律。结果表明：N3-8工作面开采至约40 m,上覆岩层开始出现裂隙;开采到180 m,工作面上覆岩层裂隙发育趋于平稳状态。该回采工作面断裂带高度约为69.8 m,裂隙主要发育区域为距顶板0~36.6 m;模拟结果与实际测定基本一致。
To study evolution laws of overburden rock fracture on the working face, find out the gas enrichment area and provide a theoretical basis for the efficient gas drainage,taking N3-8 working face in Changcun Coal Mine of Lu＇an Mine Industry Group Co. ,Ltd. as the project background, the evolution laws of overburden rock fracture in different mining lengths were studied in the paper by using the theoretical analysis and FLAC3D numerical simulation and field observation. The results show that：When N3-8 working face is mined to about 40 m,fractures appeared on overburden rock, and to 180 m,the development of fractures stabilizes. The height of the fractured zone of the working face is about 69.8 m, the major area of fissures development is in the range of 0 - 36.6 m from the roof. The simulation results were in accordance with the actual measurement in general.
出处
《中州煤炭》
2015年第1期11-13,共3页
Zhongzhou Coal
基金
中国矿业大学煤炭资源与安全开采国家重点实验室开放课题(SKLCRSM10KFB13)
关键词
岩层裂隙
瓦斯富集区
FLAC3D
仰孔分段注水
关键层
strata fracture
gas enrichment area
FLAC3D
uphole water injection by intervals
key stratum
