煤炭工程 ›› 2024, Vol. 56 ›› Issue (4): 45-52.doi: 10. 11799/ ce202404007

• 施工技术 • 上一篇    

顶升式梯形钢管混凝土支架支护技术研究及应用

赵文华,王军,杨小宁,吴学岩   

  1. 1. 国家能源集团 宁夏煤业汝箕沟无烟煤分公司,宁夏 石嘴山 753000
    2. 山东建筑大学 土木工程学院,山东 济南 250101

  • 收稿日期:2023-09-03 修回日期:2023-12-25 出版日期:2023-04-20 发布日期:2024-12-09
  • 通讯作者: 王军 E-mail:wangjun@sdjzu.edu.cn

Research on the support technology of jacking trapezoidal concrete-filled steel tube support

  • Received:2023-09-03 Revised:2023-12-25 Online:2023-04-20 Published:2024-12-09

摘要:

白芨沟煤矿0102303 工作面运输巷道位于上分层采空区下方,顶板为金属网假顶,原支护受上分层采空区扰动影响,变形严重。为此设计顶升式梯形钢管混凝土支架,通过注浆顶升试验测试各型号支架顶升性能,试验结果表明: Φ194 mm×10 mm 钢管注浆效果较好,接顶力达到3. 93 kN,满足支架顶升和巷道假顶初撑要求。为增加钢管梁抗弯强度, 在空钢管内设置抗弯圆钢,计算得支护反力为2. 3 MPa,较原支护方式提高了5. 4 倍。同时, 为解决巷道内各类支架安装困难,设计了一种举升式支架安装机,举升力可达6. 8 kN。顶升式梯形钢管混凝土支架注浆30 d 后,支架荷载基本区域稳定,安装半年内支架荷载最大值为0. 8 MPa,现场监测顶底板移进和两帮收敛均小于50 mm,支护效果良好。

关键词: 顶升式支架 , 接顶 , 支架安装机 , 注浆顶升

Abstract:

Baijigou Coal Mine adopts stratified mining,and the transport roadway of 0102303 working face is situated beneath the goaf. The roof of the construction channel is a metal mesh false roof,and the original support is seriously deformed due to the disturbance of the upper stratified goaf. For this purpose,the jacking trapezoidal concrete-filled steel tube support is designed,and the jacking performance of various types of supports was tested through grouting jacking test. The test results showed that the grouting effect of Φ194mm×10mm steel pipe was good,and the jacking force reached 3.93kN,which met the requirements of the jacking of the support and the initial support of the tunnel false roof. In order to increase the bending strength of the steel pipe beam,the bending round steel is set in the hollow steel pipe,and the calculated support reaction force is 2.3MPa,which is 5.4 times higher than the original support method. At the same time,in order to solve the installation difficulties of various kinds of supports in the roadway,a lifting bracket installation machine has been designed,and the lifting force can reach 6.8kN. After 30 days of grouting,the basic area of the support load is stable, and the maximum value of the support load within half a year of installation is 0.8MPa. The on-site monitoring shows that the top and bottom moving in and the convergence of the two sides are less than 50mm,and the supporting effect is good.

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