Method for detecting structural abnormal area of coal and rock mass

An electronic device, comprising:

• a memory;
• a processor;
• and
• a computer program stored in the memory and executable on the processor,
• wherein the processor is configured to implement the following operations when running the computer program:
• acquiring a target velocity inversion map of a coal and rock mass in a target detection cycle;
• wherein the target velocity inversion map is configured to indicate a target velocity of seismic wave propagation in each of grid cells in a target detection area;
• acquiring a first velocity of seismic wave propagation in any one of the grid cells in at least one detection cycle preceding the target detection cycle;
• determining, according to each of the first velocities and the target velocities, structural abnormal cells from each of the grid cells;
• and
• determining, according to the structural abnormal cells, a range of a structural abnormal area of the coal and rock mass in the target detection cycle in the target velocity inversion map;
• wherein determining, according to each of the first velocities and the target velocities, the structural abnormal cells from each of the grid cells comprises:
• for any one of the grid cells, determining, according to each of the first velocities and the target velocities of the grid cells, a wave velocity variation trend of the grid cell;
• and
• determining that the grid cell is the structural abnormal cell, in response to the wave velocity variation trend of the grid cell being an upward trend and the target velocity being greater than a first set threshold;
• wherein acquiring the target velocity inversion map of the coal and rock mass in the target detection cycle comprises:
• determining the target detection area of the coal and rock mass and a target seismic source energy corresponding to at least one drop hammer impact seismic source, for the target detection cycle;
• wherein the target detection area is provided with a plurality of geophones at a first side thereof, and is provided with excitation points corresponding to each of the drop hammer impact seismic sources at a second side thereof;
• controlling each of the drop hammer impact seismic sources to excite seismic waves via corresponding excitation points under a corresponding target seismic source energy, so that any one of the geophones receives seismic waves excited from each of the excitation points;
• acquiring a first arrival time of the seismic waves excited at each of the excitation points from any one of the geophones;
• and
• determining, according to the first arrival time of the seismic waves excited at each of the excitation points, the target velocity inversion map of the coal and rock mass in the target detection cycle by a seismic wave tomography;
• wherein determining, according to the first arrival time of the seismic waves excited at each of the excitation points, the target velocity inversion map of the coal and rock mass in the target detection cycle by the seismic wave tomography comprises:
• establishing an initial velocity model, wherein each of the grid cells in the target detection area has a corresponding initial velocity;
• performing, according to the initial velocity and the first arrival time, multiple rounds of iterative inversion calculations on the initial velocity model to update the initial velocity in the initial velocity model to the target velocity;
• and
• acquiring, according to the target velocity, the target velocity inversion map of the target detection area in the target detection cycle.

A non-transitory computer-readable storage medium having stored therein computer programs that, when executed by a processor, cause the following operations to be implemented:

• acquiring a target velocity inversion map of a coal and rock mass in a target detection cycle;
• wherein the target velocity inversion map is configured to indicate a target velocity of seismic wave propagation in each of grid cells in a target detection area;
• acquiring a first velocity of seismic wave propagation in any one of the grid cells in at least one detection cycle preceding the target detection cycle;
• determining, according to each of the first velocities and the target velocities, structural abnormal cells from each of the grid cells;
• and
• determining, according to the structural abnormal cells, a range of a structural abnormal area of the coal and rock mass in the target detection cycle in the target velocity inversion map;
• wherein determining, according to each of the first velocities and the target velocities, the structural abnormal cells from each of the grid cells comprises:
• for any one of the grid cells, determining, according to each of the first velocities and the target velocities of the grid cells, a wave velocity variation trend of the grid cell;
• and
• determining that the grid cell is the structural abnormal cell, in response to the wave velocity variation trend of the grid cell being an upward trend and the target velocity being greater than a first set threshold;
• wherein acquiring the target velocity inversion map of the coal and rock mass in the target detection cycle comprises:
• determining the target detection area of the coal and rock mass and a target seismic source energy corresponding to at least one drop hammer impact seismic source, for the target detection cycle;
• wherein the target detection area is provided with a plurality of geophones at a first side thereof, and is provided with excitation points corresponding to each of the drop hammer impact seismic sources at a second side thereof;
• controlling each of the drop hammer impact seismic sources to excite seismic waves via corresponding excitation points under a corresponding target seismic source energy, so that any one of the geophones receives seismic waves excited from each of the excitation points;
• acquiring a first arrival time of the seismic waves excited at each of the excitation points from any one of the geophones;
• and
• determining, according to the first arrival time of the seismic waves excited at each of the excitation points, the target velocity inversion map of the coal and rock mass in the target detection cycle by a seismic wave tomography;
• wherein determining, according to the first arrival time of the seismic waves excited at each of the excitation points, the target velocity inversion map of the coal and rock mass in the target detection cycle by the seismic wave tomography comprises:
• establishing an initial velocity model, wherein each of the grid cells in the target detection area has a corresponding initial velocity;
• performing, according to the initial velocity and the first arrival time, multiple rounds of iterative inversion calculations on the initial velocity model to update the initial velocity in the initial velocity model to the target velocity;
• and
• acquiring, according to the target velocity, the target velocity inversion map of the target detection area in the target detection cycle.