基于3DEC的深埋软岩煤巷U型钢支架-锚网索耦合支护
U-shape Steel Frame and Bolt-mesh-anchor Coupling Support Technology in Deep Soft Rock Coal Roadway by 3DEC
-
摘要: 以某矿三采区运输下山为工程背景,基于原锚网索支护巷道变形破坏特点和原因,提出了深埋软岩煤巷U型钢支架-锚网索耦合支护技术,并利用3DEC数值模拟分析其围岩应力、位移、塑性区等特征。结果表明:相比于原支护,巷道两帮及顶板浅部围岩应力明显增加,变形量、塑性区深度降低显著,顶底板移近量108.56 mm、两帮变形量61.39 mm、最大塑性区深度3 m,支护效果显著;现场巷道顶底板和两帮变形量为115.95 mm和67.00 mm,顶板离层基本为0,验证了支护技术的可靠性。Abstract: Based on the project background of transport downhill in 3# mining area of a coal mine, the U-shape steel frame and bolt-mesh-anchor coupling support technology in deep soft rock coal roadway is proposed according to the roadway deformation and failure characteristics and causes of the original bolt-mesh-anchor support method, meanwhile, the mechanical response characteristics including stress, displacement and plastic zone of roadway surrounding rock and the support effect are analyzed by 3DEC numerical simulation. The results show that the shallow surrounding rock stress of two sides and roof increases obviously, and the deformation and plastic zone depth decrease remarkably compared with the original support; the roof-to-floor convergence, deformation of two sides and maximum plastic zone depth are respectively 108.56 mm, 61.39 mm and 3 m, and the overall support effect of roadway surrounding rock is great. The field monitoring deformation of roof and floor, two sides, and roof separation are respectively about 115.95 mm, 67.00 mm and 0, which verifies the reliability of support technology.
-
Keywords:
- deep buried /
- coal roadway in roft rock /
- U-shape steel frame /
- bolt-mesh-anchor /
- coupling support /
- 3DEC
-
-
[1] 谢和平,高峰,鞠杨.深部岩体力学研究与探索[J].岩石力学与工程学报,2015,34(11):2161-2177. [2] 孟国涛,樊义林,江亚丽,等.白鹤滩水电站巨型地下洞室群关键岩石力学问题与工程对策研究[J].岩石力学与工程学报,2016,35(12):2549-2560. [3] 孟庆彬,韩立军,张建,等.深部高应力破碎软岩巷道支护技术研究及其应用[J].中南大学学报(自然科学版),2016,47(11):3862-3872. [4] 谢文兵,荆升国,王涛,等.U型钢支架结构稳定性及其控制技术[J].岩石力学与工程学报,2010,29(增2):3743-3748. [5] 康红普.煤巷锚杆支护理论与成套技术[M].北京:煤炭工业出版社,2007. [6] 王宏伟,姜耀东,赵毅鑫,等.软弱破碎围岩高强高预紧力支护技术与应用[J].采矿与安全工程学报,2012,29(4):474-480. [7] 王成,张念超,臧英新,等.千米深井软岩煤巷支护方式数值模拟研究[J].煤矿开采,2011,16(1):48-51. [8] 王卫军,彭刚,黄俊.高应力极软破碎岩层巷道高强度耦合支护技术研究[J].煤炭学报,2011,36(2):223. [9] 孟庆彬,韩立军,乔卫国,等.大断面软弱破碎围岩煤巷演化规律与控制技术[J].煤炭学报,2016,41(8):1885-1895. [10] 薛维培,姚直书,杨仁树,等.极松散厚煤层巷道锚杆与钢棚架相互增强支护技术[J].煤炭科学技术,2015, 43(5):46-49. [11] 高林,徐国强,李国峰.深部软岩巷道耦合支护方案的数值模拟[J].金属矿山,2015(5):1-5. [12] 毛晓东,吴冬梅,崔居青,等.基于3DEC的断层孤岛工作面回采矿压显现规律的数值模拟与防治措施[J].煤矿安全,2017,48(3):194-197.
计量
- 文章访问数: 328
- HTML全文浏览量: 0
- PDF下载量: 0