Seismic Roof Pressure, as one of the dynamic hazards in coal mining, is a dynamic phenomenon characterized by sudden, violent, and intense damage caused by the release of deformation energy from coal and rock mass in mine roadways and working faces. It represents a specific manifestation of mine pressure. The occurrence of seismic roof pressure in metal mines is generally referred to as a pressure bumping. The disaster releases the elastic potential energy of the overloaded coal and rock mass in a sudden, violent, and intense manner. The coal and rock blocks, along with dust, are ejected, resulting in damage to supports, roof falls, roadway blockages, injury to personnel, and the production of loud noise and seismic vibrations in the coal and rock mass. The duration of the vibration ranges from several seconds to tens of seconds, and the ejected coal and rock can weigh from several tons to several hundred tons. The energy released by this ejection ranges from 10−5 J, associated with the micro-fracturing of coal and rock, to 109 J, associated with large-scale destruction of coal and rock, which is equivalent to a seismic magnitude of 6–5 on the Richter scale.

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Principles and Prediction of Impact Ground Pressure in Coal Rock Bodies

  • Zhijie Wen,
  • Jian Tao,
  • Zhenqi Song,
  • Yujun Zuo

摘要

Seismic Roof Pressure, as one of the dynamic hazards in coal mining, is a dynamic phenomenon characterized by sudden, violent, and intense damage caused by the release of deformation energy from coal and rock mass in mine roadways and working faces. It represents a specific manifestation of mine pressure. The occurrence of seismic roof pressure in metal mines is generally referred to as a pressure bumping. The disaster releases the elastic potential energy of the overloaded coal and rock mass in a sudden, violent, and intense manner. The coal and rock blocks, along with dust, are ejected, resulting in damage to supports, roof falls, roadway blockages, injury to personnel, and the production of loud noise and seismic vibrations in the coal and rock mass. The duration of the vibration ranges from several seconds to tens of seconds, and the ejected coal and rock can weigh from several tons to several hundred tons. The energy released by this ejection ranges from 10−5 J, associated with the micro-fracturing of coal and rock, to 109 J, associated with large-scale destruction of coal and rock, which is equivalent to a seismic magnitude of 6–5 on the Richter scale.