极不稳定巷道（Ｖ类）的合理支护一直是煤炭行业未能较好解决的困难课题之一。利用尽可能提高围岩本身支承能力的原理来解决困难地层巷道支护问题获得成功，介绍了Ｖ类巷道的破坏机理、国内外支护现状。通过工业性试验，介绍和说明了锚、网（带）、喷与注浆锚杆联合支护技术，并简述了该支护方式的支护机理、技术经济效益和推广应用前景。 Reasonable support of extremely unstable tunnels (Category V) has been one of the difficult issues that the coal industry has not been able to solve well. The successful application of the principle to maximize the supporting capacity of surrounding rock to solve the problem of roadway support in difficult formation is introduced. The failure mechanism of V-type roadway and the status quo of support at home and abroad are introduced. Through the industrial experiment, the joint support technology of anchor, net (belt), spray and grouting bolt is introduced and described. The supporting mechanism, technical and economic benefits as well as the popularization and application prospect of this support are briefly described.