基于泡沫混凝土和U型钢的煤矿巷道支护体系研究  

Coal Mine Roadway Support System Based on Foam Concrete and U-beam Steel

作　　者：崔良杰 CUI Liangjie(Sanjusheng Coal Industry Co.,Ltd.,Shanxi Coal Transportation and Sales Group,Taiyuan 030300,Shanxi,China)

机构地区：[1]山西煤炭运销集团三聚盛煤业有限公司,山西太原030300

出　　处：《能源与节能》2024年第2期207-210,共4页Energy and Energy Conservation

摘　　要：针对煤矿软岩大变形巷道,提出了由钢网、锚杆、锚索、喷射混凝土、可压缩U型钢、泡沫混凝土阻尼层、裂隙岩缓冲层组成的组合支护体系。运用了数值分析和现场监测的技术手段。数值分析结果表明,泡沫混凝土能吸收围岩的大部分变形,U型钢的收缩率显著降低,U型钢的平均轴力与泡沫混凝土厚度呈二阶方程关系。在工程实践中,当泡沫混凝土厚度超过30 cm时,阻尼效应不再明显。现场监测结果表明,围岩位移及U型钢受力在组合支护体系初始阶段20 d内均呈增大趋势,但增大趋势减弱。A combined support system consisting of steel mesh,anchor rods,anchor ropes,sprayed concrete,compressible U-beam,foam concrete damping layer,and fissure rock buffer layer was proposed for the large deformation roadway of soft rock in coal mines.The technical means of numerical analysis and on-site monitoring were used.The numerical analysis results show that the foam concrete absorbs most of the deformation of the surrounding rock,the shrinkage rate of the U-beam is significantly reduced,and the average axial force of the U-beam is in the relationship of second-order equation with the thickness of the foam concrete.In engineering practice,when the thickness of foam concrete exceeds30 cm,the damping effect is no longer obvious.And the on-site monitoring results show that in the first 20 d after the formation of the support system,the displacement of the surrounding rock and the force borne by the U-beam show an increasing trend,but the increasing trend is reduced.

关 键 词：围岩 组合支护体系 U型钢 泡沫混凝土 

分 类 号：TD353.3[矿业工程—矿井建设]