于广龙王军何晓升夏方迁张西忠田甜

摘要：针对查干淖尔矿主斜井泥岩段软岩巷道的地质条件，通过室内实验对软岩围岩进行力学性能测试和矿物成分分析，并结合主斜井泥岩段的巷道变形特点，设计了钢管支架支护方案，其中，采用浅底拱圆形和椭圆形巷道支护断面，钢管支架主体钢管选用Φ194×10无缝钢管，钢管内充填固体性材料，辅助金属网支护和喷层支护。通过现场施工和现场监测分析可知，该支护方案易于施工，并且能够维持主斜井泥岩段软岩巷道围岩的稳定。

关键字：膨胀性软岩、钢管支架、现场监测

Abstract: based on the Nao mine shafts mudstone chagan''s section of the soft rock tunnel geological conditions, through the indoor experiment to soft rock surrounding rock mechanical performance testing and mineral composition analysis, and combined with the slope of roadway deformation characteristics for shale, design the steel pipe support support scheme, among them, the shallow tunnel supporting and elliptic arch circular cross section, steel pipe support main body steel tube choose Φ 194 x 10 seamless steel pipe, steel tube filling materials in solid sex, auxiliary metal nets support and shotcrete layer support. Through the field construction site monitoring and analysis, we can conclude that the retaining easy construction scheme, and the ability to maintain the Lord slope mudstone period of soft rock tunnel the stability of surrounding rock.

Key word: pa soft rock, steel pipe support, monitoring

中图分类号：TU74文献标识码：A 文章编号：

目前国内外对于软岩巷道采取要“先柔后刚、先挖后让、柔让适度、稳定支护”,由此发展了锚喷网技术、锚喷网架支护技术等联合支护技术[1-5]，但是由于围岩压力较大，巷道自承能力较差，锚固支护效果较差，而普通金属架支护承载能力较差，且支护成本相对较高，受到支护成本和支护材料的限制，软岩巷道支护困难。随着钢管支架支护技术逐步成熟，逐步应用深井软岩巷道的支护中，联合其他支护方式，维持巷道围岩的稳定，为深井软岩巷道支护提供一种新的支护方式[6-7]。

本文结合查干淖尔矿主斜井泥岩段膨胀性软岩巷道的地质条件和巷道变形特点，采用高强度钢管支架支护方案,极大提高巷道径向支护反力,提高巷道围岩的承载能力，现场监测及观感质量表明，钢管支架支护方案能够维持巷道围岩的稳定。……