Rock dynamics in deep mining

Abstract

Rock mass dynamics disasters caused by excavations and mining occur frequently in deep mines. In order to establish a theoretical system and control technologies for such disasters, we first classify and define dynamic disasters, such as rock bursts, coal bursts, mine pressure bumps, and mine earthquakes. According to the occurrence mechanism of different types of dynamic disasters, we establish a compensation control theory based on excavation and mining effects. On the basis, we propose three key technologies: high prestress compensation technology for the roadway, pressure relief technology using directional roof cutting, and the goaf filling technology using broken rock dilation. These three technologies constitute the compensation control method for dynamic disasters in deep mines. Finally, this method was successfully applied in a deep coal mine with high stress, with monitored results suggesting its rationality. This work provides a new concept and control method for the prevention of rock dynamic disasters in deep mines.

Keywords

• Rock burst
• Coal burst
• Mine pressure bump
• Mine earthquake
• Excavation compensation control
• Mining compensation control