预应力全长复合锚固及锚注一体化综合支护技术及工程应用
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摘要
在淮南矿区深部巷道现状分析的基础上,提出了预应力全长复合锚固及锚注一体化综合支护技术,并指出了其拉力分散型的力学本质,在控制围岩切向、径向变形方面,全长锚固显著优于端部锚固。顾北矿支护型式对比试验结果表明,采用本技术能够同步实现预紧及时支护、全长锚固和注浆三位一体多重功能,在围岩控制效果、掘进速度及支护成本方面具有显著优势,是解决淮南矿区深部及复杂应力环境巷道支护的有效途径。
Based on the analysis of the present situation of deep roadway in Huainan Mining Area, the comprehensive support technology of pre-stressed full-length composite anchorage and anchorage-grouting integration is proposed. The mechanical nature of its tensile dispersion is pointed out also. The full length anchorage is greatly superior to end anchorage in controlling the shear and radial deformation of surrounding rock. The comparison in Gubei Coal Mine test results of support type shows that this technique can realize the multiple functions of pre-tightening, timely support and full-length composite anchorage and grouting simultaneously. It has obvious advantages in controlling the surrounding rock, digging speed and supporting cost. It is an effective way to solve the deep and complex stress environment roadway support in Huainan Mining Area.
Based on the analysis of the present situation of deep roadway in Huainan Mining Area, the comprehensive support technology of pre-stressed full-length composite anchorage and anchorage-grouting integration is proposed. The mechanical nature of its tensile dispersion is pointed out also. The full length anchorage is greatly superior to end anchorage in controlling the shear and radial deformation of surrounding rock. The comparison in Gubei Coal Mine test results of support type shows that this technique can realize the multiple functions of pre-tightening, timely support and full-length composite anchorage and grouting simultaneously. It has obvious advantages in controlling the surrounding rock, digging speed and supporting cost. It is an effective way to solve the deep and complex stress environment roadway support in Huainan Mining Area.
引文
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[15]王琦,潘锐,李术才,等.三软煤层沿空巷道破坏机制及锚注控制[J].煤炭学报,2016,41(5):1111.
[2]王庆牛,杨张杰,王威.预应力锚注技术在深井高应力巷道修复中的应用[J].煤炭工程,2018,50(3):47.
[3]王威,杨张杰,王福海,等.全长锚固技术在深井软岩巷道中的应用[J].煤炭工程,2016,48(2):50-52.
[4]李明远.软岩巷道锚注支护理论与实践[M].北京:煤炭工业出版社,2001.
[5]李云,何宇雄,叶川.深部软岩巷道锚注支护技术研究现状与展望[J].煤矿安全,2015,46(4):192-195.
[6]陆士良.高阻力全长锚固锚杆围岩控制的机理和效果[J].煤炭科学技术,1999,27(7):37-39.
[7]刘爱卿,鞠文君.预应力全长锚固锚杆抗剪作用分析[J].煤矿开采,2012,17(1):45-48.
[8]王卫军,杨磊,林大能,等.松散破碎围岩两步耦合注浆技术的研究与应用[J].煤炭科学技术,2005,33(6):42-45.
[9]李冲,徐金海,李明.全长锚固预应力锚杆杆体受力特征分析[J].采矿与安全工程学报,2013,30(2):189.
[10]尤春安.全长黏结式锚杆的受力分析[J].岩石力学与工程学报,2000,19(3):339-341.
[11]王连国,陆银龙,黄耀光,等.深部软岩巷道深-浅耦合全断面锚注支护研究[J].中国矿业大学学报,2016,45(1):11-17.
[12]刘文涛,王安舍,张正斌,等.中空注浆锚索在沿空留巷支护中的应用[J].煤炭工程,2011(6):42-44.
[13]郝晓亮,孙增飞,陈大广,等.全长锚固注浆锚索在巷道过极易破碎大断层支护中的应用[J].煤炭工程,2010(6):24-26.
[14]魏夕合,黄庆显,蒋敬平,等.深部巷道高强全锚注一体化技术研究与应用[J].煤炭工程,2017,49(2):43-45.
[15]王琦,潘锐,李术才,等.三软煤层沿空巷道破坏机制及锚注控制[J].煤炭学报,2016,41(5):1111.