中国矿山工程

The application of the technology of cutting top and pressure relief to the retaining roadway of 80706 return air roadway, according to the actual surrounding rock conditions of the roadway, by using engineering analogy method and theoretical calculation method, the roof cutting and pressure relief scheme of roadway retaining section, roof retaining and gangue supporting parameters of roadway retaining section and goaf are determined. After field application, the amount of roof and floor approaching and the deformation of roadway side are small, it will not have a significant impact on the subsequent use of the roadway.