深部煤巷过断层应力演化特征及围岩稳定性研究  

Study on Stress Evolution Characteristics and Surrounding Rock Stability of Deep Coal Roadway through Fault

作　　者：栾博 华心祝[1] 李怀宾 张承冉 张莹 LUAN Bo;HUA Xinzhu;LI Huaibin;ZHANG Chengran;ZHANG Ying(College of Mining Engineering,Anhui University of Science and Technology,Huainan 232001,China;College of Safety Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China;Shandong Zaokuang Zhongxing High-tech Industry Co.,Ltd.,Zaozhuang 277000,China;China Coal Xinji Liuzhuang Mining Co.,Ltd.,Fuyang 236200,China)

机构地区：[1]安徽理工大学矿业工程学院,安徽淮南232001 [2]安徽理工大学安全科学与工程学院,安徽淮南232001 [3]山东枣矿中兴高新技术产业有限公司,山东枣庄277000 [4]中煤新集刘庄矿业有限公司,安徽阜阳236200

出　　处：《煤炭技术》2024年第2期28-33,共6页Coal Technology

基　　金：国家自然科学基金项目(51774010)。

摘　　要：针对朱仙庄煤矿Ⅱ1057工作面机巷掘进过断层破碎带支护困难问题。通过数值模拟,研究煤巷掘进过断层全过程。分析断层前后25 m围岩超前支承应力演化特征,结合距断层不同位置煤巷塑性区、位移变化,研究表明:F2断层对煤巷影响范围为10 m。运用理论分析,得出破碎围岩条件下非等压煤巷塑性区发育规律;计算F2断层位置顶板塑性破坏深度为2.56 m。通过现场实测,分析F2断层区域的钻孔窥视特征,确定顶板裂隙富集极限距离为2.7 m;并提出锚+网+索+喷联合支护,发挥深部完整岩层承载能力,维护围岩稳定。现场监测断层破碎带顶底板累计位移量为107 mm,两帮累计位移量为27 mm,围岩得到有效控制。Aiming at the difficulty of supporting through fault fracture zone inⅡ1057 working face of Zhuxianzhuang coal mine.Through numerical simulation,the whole process of coal tunnel boring through fault was studied.By analyzing the evolution characteristics of the pre-supporting stress of the surrounding rock 25 m before and after the fault,combined with the displacement changes of the plastic zone of the coal roadway at different positions of the fault,the study shows that the influence range of F2 fault on the coal roadway is 10 m.By theoretical analysis,the development law of plastic zone in non-isobaric coal roadway under the condition of broken surrounding rock is obtained.The calculated plastic failure depth of the roof at F2 fault position is 2.56 m.Through the field measurement,combined with the characteristics of borehole observation in F2 fault area,the enrichment limit distance of roof crack is 2.7 m.The combined support of anchor+wire mesh+cable+spray is proposed to exert the bearing capacity of deep intact rock formation and effectively maintain the stability of surrounding rock.The cumulative displacement of the top and bottom of the fault fracture zone is 107 mm,and the cumulative displacement of the two sides is 27 mm,and the surrounding rock is effectively controlled.

关 键 词：断层破碎带 煤巷 超前支承压力 钻孔窥视 联合支护 

分 类 号：TD322[矿业工程—矿井建设] TD353