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Because of the existence of high stress in the surrounding rock of deep roadway, the physical and mechanical properties of the surrounding rock to change, and the surrounding rock stress distribution is very different from the shallow, so the way of shallow roadway support is not suitable for deep roadway. Deep soft-rock roadway support is a complex systems engineering, it should consider the different geological conditions, roadway scope of application, construction technology conditions, construction period and the cost and other factors to determine the optimal combined support program, if the special geological conditions encountered in the construction, it should be timely to improve the supporting program to meet the construction safety and ensure the quality. This paper is based on the characteristics of deep roadway support, sums up the combined support form in the project, researches and analyzes the combined support technology, and explores how to use suitable combined support form in deep roadway.

Practical teaching is a very important practical instructional segment in the period of undergraduate course of geotechnical engineering. With the rapid development of higher education, the university with distinctive features is attracted more attention. Mining is our university feature, the Status and Problems of graduation fieldwork in geotechnical engineering are analyzed; the practical teaching experience in reform in recent years is introduced; the reforms on fieldwork methods, guidelines and practical content of the geotechnical engineering are made the bold attempt, and its using in the sessions of the graduation students proved that the idea of reform is correct, guidelines is accurate and measures is appropriate, and graduation fieldwork effect of geotechnical engineering as "mining" characteristics is improved.

An experimental study on the fire performance of reinforcing concrete beam-column joints under ISO834 standard temperature-time curve was carried out, and the main parameters including the load ratio of the beams and axial compression ratio of the columns were chosen to study the performance of the joints. The deformation, the explosive spalling of concrete, the fire resistance and the collapse mechanism of the joints in fire are observed carefully, and several conclusions are drawn in the end.