高强预应力锚带网索组合控制下支护效果评价分析  

Evaluation and Analysis of the Support Effect under the Control of High-strength Prestressing Anchor Belt Mesh Rope and Cable Combination

作　　者：孙治豪 司尚金 Zhihao Sun;Shangjin Si(Yushuquan Coal Mine of Kuche Kexing Coal Industry Co.,Ltd.,Kuche,Xinjiang 842000;Shaozhai Coal Industry Co.,Ltd.in Lingtai,Gansu,Pingliang,Gansu 744401)

机构地区：[1]库车市科兴煤炭实业有限责任公司榆树泉煤矿,新疆库车842000 [2]甘肃灵台邵寨煤业有限公司,甘肃平凉744401

出　　处：《新疆钢铁》2024年第3期98-100,共3页Xinjiang Iron and Steel

摘　　要：针对王家寨煤矿现有支护手段支护效果不佳的问题,本文提出采用高强、高预紧力锚杆与预应力锚索进行组合支护,以调动发挥顶板的自承载能力和两帮煤体的全面承载作用。为探究在该生产技术条件、围岩地质条件及围岩应力状态下巷道的变形规律检验支护效果,选择在三才轨道下山作为研究对象进行现场测试。先进行锚杆锚索支护参数计算,同时考虑锚杆、锚索、钢带、金属网等支护材料的强度,以此确定巷道断面设计,接着利用ANSYS模拟支护前后围岩的应力和位移变化情况。从模拟结果能够得知,所采取的支护方案可以有效控制围岩变形,且支护参数合理。通过现场试验观测,设计的支护方式和支护参数基本满足井下正常生产的需要,但巷道上帮的变形仍较大,主要原因是上帮的松动破坏范围大,部分段已经超过了锚杆的锚固范围,因此建议适当增大上帮锚杆的长度,以更好地发挥其支护性能,进一步提高和改进支护效果。In response to the poor support effect of the existing support methods in Wangjiazhai Coal Mine,this article proposes the use of high-strength and high pre tension anchor rods and prestressed anchor cables for combined support to mobilize and exert the self bearing capacity of the roof and the comprehensive bearing capacity of the two coal bodies.In order to understand the deformation law of the roadway under the production technology conditions,geological conditions of the surrounding rock,and stress state of the surrounding rock,and to test the support effect,the study object was selected to conduct on-site testing on the downhill of the Sancai track.Firstly,calculate the parameters of anchor rod and anchor cable support,while considering the strength of support materials such as anchor rod,anchor cable,steel strip,metal mesh,etc.,to determine the design of the tunnel section.Then,use ANSYS to simulate the stress and displacement changes of the surrounding rock before and after support.From the simulation results,it can be concluded that the adopted support scheme can effectively control the deformation of the surrounding rock,and the support parameters are reasonable.Through on-site experimental observation,the designed support method and parameters basically meet the needs of normal underground production.However,the deformation of the upper support of the roadway is still significant,mainly due to the large range of loosening and damage of the upper support.Some sections have exceeded the anchoring range of the anchor rod.Therefore,it is recommended to increase the length of the upper support anchor rod appropriately to better exert its support performance and further improve the support effect.

关 键 词：锚杆(索)支护 方案优化 数值模拟 断面设计 

分 类 号：TD353[矿业工程—矿井建设]