摘要
为研究断层对煤层群采动裂隙演化规律的影响,以贵州土城煤矿151710工作面为研究对象,基于相似模拟和数值模拟方法对含断层煤层群采动裂隙演化规律进行研究。结果表明:含断层煤层群中9号、12号煤层开采到相同距离时工作面周围应力分布显著不同;9号煤层的超前开采,使12号煤层处于应力降低区,过断层开采时工作面前后出现应力分区现象;随着开采的进行,12号煤层的采动影响范围小于9号煤层;当开采工作面过断层时,覆岩裂隙发育迅速,岩层间出现显著离层,并发生不同程度的断裂。现场12号煤层回风巷顶板钻孔窥视显示:当工作面过断层时,顶板破碎严重,覆岩裂隙发育杂乱。
To study the influence of faults on the evolution of mining fissures in coal seam group, the mining fissure evolution of coal seam group containing faults was investigated based on similar simulation and numerical simulation methods by taking 151710 working face of Tucheng Coal Mine in Guizhou Province as the research object. The results show that the stress distribution around the working face is significantly different when the No.9 and No.12 coal seams in coal seam group containing faults are mined to the same distance;the advance mining of No.9 coal seam makes No.12 coal seam in the stress reduction zone, and the stress zoning phenomenon appears before and after the working face crosses faults;with the progress of mining, the mining influence range of No.12 coal seam is less than that of No.9 coal seam;when the mining face crosses the fault, the overlying rock cracks develop rapidly, there is significant separation between the rock layers, and different degrees of fractures occur. The drilled and peered resule from roof of return air lane of No.12 coal seam shows that when the working face crosses the fault, the roof is broken seriously and the overlying rock fissure develops disordered.
作者
黄冬斌
康向涛
高璐
胡锦国
龙永艳
任钞
HUANG Dongbin;KANG Xiangtao;GAO Lu;HU Jinguo;LONG Yongyan;REN Chao(School of Mining,Guizhou University,Guiyang 550025,China)
出处
《煤矿安全》
CAS
北大核心
2024年第9期128-138,共11页
Safety in Coal Mines
基金
国家自然科学基金地区基金资助项目(52064009,52264015)
安徽理工大学煤矿安全高效开采省部共建教育部重点实验室开放基金资助项目(JYBSYS2021206)。
关键词
采动裂隙
断层
煤层群
裂隙演化
相似模拟
数值模拟
mining-induced fissure
fault
coal seam group
fracture evolution
similar simulation
numerical simulation
