煤炭工程 ›› 2025, Vol. 57 ›› Issue (12): 63-69.doi: 10. 11799/ ce202512009

• 施工技术 • 上一篇    下一篇

彬长矿区支护材料及构件静动载力学性能试验研究

焦 彪,冯友良,黄义亮,周鹏赫   

  1. 1. 陕西彬长胡家河矿业有限公司,陕西 咸阳 713600

    2. 中煤科工开采研究院有限公司,北京 100013

  • 收稿日期:2025-04-12 修回日期:2025-07-10 出版日期:2025-12-11 发布日期:2026-01-26
  • 通讯作者: 冯超 E-mail:807436732@qq.com

Experimental study on static and dynamic mechanical properties of supporting materials and components in Binchang mining area

  • Received:2025-04-12 Revised:2025-07-10 Online:2025-12-11 Published:2026-01-26
  • Contact: feng youliang E-mail:807436732@qq.com

摘要:

为确定彬长矿区冲击地压巷道围岩支护的设计依据,选用巷道支护系统中常用的支护材料及构件,开展静载和冲击动载试验研究,系统分析锚杆、锚索、托盘、金属网的静载力学性能及冲击动载作用下的力学响应特征和破坏形态。试验结果表明:静载作用下,测试锚杆极限承载力为293.7kN,伸长率为12.5%,测试锚索抗拉强度达到1980MPa,伸长率为9.9%,锚杆托盘压缩载荷-变形曲线呈多阶段发展,最大载荷为386kN。落锤冲击作用下,测试锚杆冲击力位移曲线经历弹性、塑性和回弹三个阶段,锚杆最多能承受8次冲击,冲击延伸率为9.98%,且脆性增强;测试锚索冲击力-位移曲线呈收紧、急剧增长、稳定变形和回弹四个阶段发展,冲击力峰值最大为550kN,动载伸长率为1.57%,吸收能量为1.35×104J。锚杆蝶形托盘和W型托盘冲击力-位移曲线先后经历缓慢增长,线性增长,平稳增长和急剧衰减四个阶段。另外,相较于蝶形托盘,W型托盘前期抗冲击能力较差。金属网冲击力-位移曲线大致经历线性增长,剧烈波动和快速衰减三个阶段,随着冲击能量增加,冲击力峰值基本呈增长趋势,变形量持续增大,网格基本保持了原有形态,缓冲性能较好。

关键词: 冲击地压, 支护材料, 冲击试验, 静载试验, 力学性能

Abstract:

In order to provide design basis for surrounding rock support of rock burst roadway in Binchang mining area, support materials and components commonly used in roadway support system were selected to carry out static load and impact dynamic load test research. The static mechanical properties of anchor cables, bolts, trays and metal meshes, as well as the mechanical response characteristics and failure modes under the action of impact dynamic load are systematically analyzed. The experimental results show that: under the action of static load, the ultimate bearing capacity of the bolt is 293.7 kN, and the elongation rate is 12.5%. The tensile strength of the anchor cable reaches 1980 MPa, and the elongation rate is 9.9%. The compression load-deformation curve of the bolt tray develops in multiple stages, and the maximum load is 386 kN. Under the action of drop hammer impact, the impact force-displacement curve of the bolt goes through three stages: the elastic stage, the plastic stage and the rebound stage. The bolt can withstand a maximum of 8 impacts, with an impact elongation rate of 9.98%, and its brittleness is enhanced. The impact force-displacement curve of the anchor cable develops in four stages: tightening, rapid growth, stable deformation and rebound. The maximum peak value of the impact force is 550 kN, the elongation rate under dynamic load is 1.57%, and the absorbed energy is 1.35×104J. The impact force-displacement curves of the bolt tray and the W-shaped tray successively go through four stages: slow growth, linear growth, steady growth and sharp decay. Compared with the bolt tray, the W-shaped bolt has a large deformation and a small impact force in the slow growth stage, and its impact resistance in the early stage is poor. The impact force-displacement curve of the metal mesh roughly goes through three stages: linear growth, violent fluctuation and rapid decay. With the increase of the impact energy, the peak value of the impact force basically shows an increasing trend, the deformation continues to increase, the mesh basically maintains its original shape, and it has good cushioning performance.

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