Coordinated control technology for anti-impact pressure relief of mining roadway and large deformation of surrounding rock

Abstract

The mining roadway under complex conditions was taken as the project background in No.3305 working face of Yiqiao Coal Mine, and the research on the coordinated control was carried out for anti-impact pressure relief and surrounding rock deformation on account of the problems of rock burst prevention and surrounding rock deformation control in mining roadway under complex stress conditions. A local filling and strengthening technique was proposed for the pressure relief drilling in the anchorage seam of roadway surrounding rock from the perspective of controlling the stability of the surrounding rock. Theoretical analysis showed that the borehole backfilling can reduce the damage range of coal body around borehole effectively. The key parameters of the borehole filling were determined about the coordinated control of pressure relief and reinforcement through numerical simulation. The field practice showed that the local filling technology of large diameter borehole could achieve the stability control of roadway surrounding rock while realizing the coal body pressure relief, and effectively reduce the deformation and repair times of roadway during use. Compared with no borehole backfilling, the maximum amount of two sides for the roadway was reduced 57.2% after the construction of the borehole backfilling.

Keywords

• rock burst
• reinforcement technology of pressure relief drilling
• pressure relief with large diameter drilling
• deformation control of roadway surrounding rock
• abaqus