The Coupled Control of Floor Heave Based on a Composite Structure Consisting of Bolts and Concrete Antiarches

摘要

A composite structure, including concrete antiarches and bolts, was designed to control the floor heave. This semiclosed structure may reinforce the floor and the two bottom corners of the roadway. Then, based on some relative assumptions, we established a model for this structure. We further analyzed this model and revealed the floor heave mechanism. In addition, based on the above analysis, we proposed the stability criterion for this structure. Moreover, with the practical conditions, we proposed a support system for the #1 roadway in S6 mining area of Changcun mine. Furthermore, the stability analysis and the numerical simulation verified the correctness of the design parameters. Simultaneously, the field investigation shows that the floor heave has been reduced by 78.7%, a close value to the mechanical analysis.