The gob-side entry driving is a long-walled coal mining often used in the form of exploitation, and the roadway driving with coal pillars can effectively isolate the goaf to prevent water and harmful gases in the goafs into the roadway. Therefore, the response of deep underground coal mine structure should be analyzed under the seismic load.
#WHAT FREQUENCY AND VALUES SKIPPED IN SEISMOSIGNAL SERIES#
In the limited deep space, mine earthquakes may cause a series of other coal mine disasters, such as rock explosion, coal and gas outburst, and water penetration. Underground coal mines are gradually affected by mine earthquakes with increased coal mining depth. Natural earthquakes have caused different degrees of damage to coal mines. Natural and mine earthquakes are not essentially different. The deep underground mining often induces seismic activity, which is called mine earthquake. The earthquake disaster causes serious damage to ground buildings and brings about serious effects to underground structures.
In the end, suggestions for the reasonable setting of coal pillars under seismic load are provided. A reasonable width of the coal pillar is proposed on the basis of the stability of the roadway and the coal pillars. The deformation, stress distribution, and plastic area distribution of roadways and coal pillars are systematically studied, and the situations under the static load and the roadways, which are not affected by the goafs, are compared and analyzed.
This model simulates the seismic response of different coal pillar widths and the seismic conditions of the deep-buried roadways under the influence of the adjacent goafs. In this work, a numerical study is conducted on the seismic response of deep-buried roadways in coal mines under the influence of goafs, and a 3D numerical model of the seismic response simulation of deep-buried roadways is established using the coupling model of the finite difference method and the distinct element method.