火成岩侵入区巷道围岩控制技术

Roadway Surrounding Rock Control Technology of Igneous Rock Intrusion Area

针对石炭系3-5#层火成岩侵入区煤层进行了力学参数的测定,分析了火成岩侵入区全煤破碎巷道的变形破坏特征,制定了巷道围岩控制方案,并通过工业试验进行了支护效果检验。研究发现,受到火成岩侵入影响,煤层发生了受热变质、硅化,脆性增强,容易破碎,采用中空注浆锚索、金属支架及壁后充填的支护技术,能够对巷道起到良好的控制效果。

The determination of mechanical parameters aims at the Carboniferous-permian 3-5# coal seam of igneous rock intrusion area, the deformation and failure characteristics of full coal fracture roadway in igneous rock intrusion area are analyzed, the roadway surrounding rock control scheme is maked, and the supporting effect inspection is carried on through the industrial test. The finding suggests that coal heat damage and silicide are happened affected by the igneous rock intrusion, brittle and easily broken, they have good control effect for roadway by using support technology of hollow grouting anchor cable, metallic stent and back filling.