深井软岩巷道钢管混凝土支护结构性能试验及应用  

TEST ON STRUCTURAL PROPERTY AND APPLICATION OF CONCRETE-FILLED STEEL TUBE SUPPORT OF DEEP MINE AND SOFT ROCK ROADWAY

作　　者：高延法[1,2] 王波[1,2] 王军[1,2] 李冰[1,2] 邢飞[1,2] 王宗纲[3] 金同乐[3] 

机构地区：[1]中国矿业大学,北京100083 [2]中国矿业大学深部岩土力学与地下工程国家重点实验室,北京100083 [3]清华大学结构工程与振动教育部重点实验室,北京100084

出　　处：《岩石力学与工程学报》2010年第A01期2604-2609,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重点基础研究发展计划(973)项目(2006CB202200);长江学者和创新团队发展计划(IRT0656);清华大学结构工程与振动教育部重点实验室开发研究基金资助项目(200801)

摘　　要：深井软岩及动压巷道支护难度大,传统的支护方式已难以满足需要。为此研发钢管混凝土支架,在实验室测试支架的力学性能,试验支架采用φ140mm×4.5mm钢管和C40混凝土,由4段构成,接头采用套管连接。在侧向约束、纵向点载荷加压条件下,试验支架的极限承载力为1504.1kN,纵向极限压缩变形为82.65mm,破坏方式为钢管材料屈服破坏。与U型钢支架相比,钢管混凝土支架支护反力大、性价比优越。钢管混凝土支架在煤矿井下巷道支护应用效果良好,有着广泛的推广应用前景。Traditional supports are difficult to maintain the route work of roadway in deep well due to dynamic pressure propagation within soft rock. To tackle this problem, concrete-filled steel tube support is developed and further the mechanical properties of the support are tested in laboratory. The experimental supports are composed by four sections of Ф140 mm×4.5 mm steel tube, with concrete C40, and joints with casing linkage. Under the conditions of lateral constraint and vertical point load pressure, the ultimate bearing capacity of experimental support is about 1 504.1 kN; and the vertical ultimate compressive deformation reaches 82.65 mm, resulting in failure mode of steel tube. Compared with the U-shaped steel support, concrete-filled steel tube support holds not only high supporting capacity, but also with a competitive price. So concrete-filled steel tube structure may have an extensive application to coal mine roadway.

关 键 词：采矿工程 钢管混凝土支架 支架力学性能试验 深井软岩巷道 巷道支护 

分 类 号：TD32[矿业工程—矿井建设]