深埋冲击地压矿井多关键层结构稳定性及防冲减震技术研究  

RESEARCH ON THE STABILITY OF MULTI-KEY LAYER STRUCTURES AND ANTI-IMPACT AND VIBRATION REDUCTION TECHNOLOGIES IN DEEPLY BURIED ROCKBURST MINES

作　　者：赵乾 张帝 马平 韩刚 高敬勇 解嘉豪 ZHAO Qian;ZHANG Di;MA Ping;HAN Gang;GAO Jingyong;XIE Jiahao(Zhongtian Hechuang Energy Company Limited,Ordos 017000,Inner Mongolia,China;China Coal Energy Research Institute Company Limited,Xi’an 710000,China;China Coal(Ordos)Energy Technology Company Limited,Ordos 017000,Inner Mongolia,China)

机构地区：[1]中天合创能源有限责任公司,内蒙古鄂尔多斯017000 [2]中煤能源研究院有限责任公司,西安710000 [3]中煤(鄂尔多斯市)能源科技有限责任公司,内蒙古鄂尔多斯017000

出　　处：《力学与实践》2025年第2期364-373,共10页Mechanics in Engineering

摘　　要：为给深埋冲击地压多关键层矿井安全生产创造有利条件,基于符拉索夫板理论开展多关键层结构稳定性研究,发现厚硬岩层内部拉应力最大值受采空区短边影响较大,且厚硬岩层中拉应力极值随巨厚覆岩层厚度的增大而减小。另外,研究认为3100工作面关键层一(厚度5~22 m)在采空区走向边宽度达到20~25 m左右时会发生破断;关键层二(厚度33~53 m)在采空区走向边宽度达到90~100 m左右时会发生破断。然后通过现场实践的研究方法,针对不同层位厚硬顶板提出了低位顶板爆破卸压,高位定向水力压裂卸压的防冲减震措施。最后,对比分析门克庆煤矿同采区的3100工作面与3102工作面防冲措施卸压效果,采用多关键层卸压措施的3100面比未采取多关键层卸压措施的3102面每米微震频次降低了9.5%,每米微震能量降低了86.2%。研究成果已应用于门克庆矿井,取得了良好的效果。In order to create favorable conditions for the safe production of mines with multi-key layer structures and deeply buried impact ground pressure,a study on the stability of these structures was carried out based on the Vlasov plate theory.It is found that the maximum tensile stress within thick hard rock layers is greatly influenced by the short side of the goaf,and that the maximum tensile stress in thick hard rock layers decreases as the thickness of the overlying rock layer increases.In addition,research suggests that the first key layer(thickness 5~22 m)of the 3100 working face will break when the width of the goaf reaches approximately 20-25 m,while the second key layer(thickness 33~53 m)will break when the goaf width reaches approximately 90~100 m.Subsequently,through on-site practical research methods,anti-impact and shock absorption measures were proposed for different layers of thick and hard roof,including low-level roof blasting pressure relief and high-level directional hydraulic fracturing pressure relief.Finally,a comparative analysis was conducted on the pressure relief effects of the 3100 and 3102 working faces in the same mining area of Menkeqing coal mine.Ihe results revealed that the 3100 face,which adopted multiple key layer pressure relief measures,experienced a 9.5%reduction in microseismic frequency per meter and an 86.2%reduction in microseismic energy per meter compared to the 3102 face,which did not adopt such measures.The research results have been implemented in the Menkeqing mine and have achieved positive outcomes.

关 键 词：厚硬岩层 冲击地压 岩层破断 效果检验 

分 类 号：TD324[矿业工程—矿井建设]