Method of advanced detection of breaking-loss wing coal seam of coal road based on single offset pair observation system
An observation system and advanced detection technology, applied in seismology for logging records, etc., can solve the problem of inability to determine the position of the missing wing coal seam, and achieve the effects of low cost, accurate detection, and easy operation.
Inactive Publication Date: 2015-07-15
CHINA UNIV OF MINING & TECH
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[0004] In order to solve the problem that the position of the broken wing coal seam cannot be determined in mines with irregular coal seams, the present invention provides a coal seam based on a single artillery inspection pair observation system A method for advanced detection of coal seams with lost wings. This method can not only use the dynamic characteristic information of the main polarization direction and amplitude of the diffraction wave at the break point of the lost wings coal seam for advanced prediction, but also has accurate detection, low cost, and is easy to operate. It fills the gap in the method of using geophysical methods to detect the lost wing coal seam under the mine, and brings great convenience to the mine construction
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[0029] In the figure, the specific steps of the coal roadway detection method for the broken wing coal seam based on the single shotgun observation system are as follows:
[0030] (1) A shot point is arranged at the front floor of the coal roadway to excite seismic waves. A detection point with X and Z components is arranged every 20m directly behind the shot point. Seismographs arranged in the roadway can obtain seismic records. The observation system Arranged as figure 1 , the direction to the right in the figure is the excavation direction;
[0031] (2) According to the sequence of seismic wave propagation time, the X and Z components can be determined in the seismic records to determine the diffraction wave train at the break point of the coal seam in the missing wing, as shown in figure 2 shown;
[0032] (3) Comparing the amplitude values of the X and Z components in the diffracted wave train at the breakpoint of the broken wing coal seam, select the diffracted wave ...
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The invention relates to a method of advanced detection of a breaking-loss wing coal seam of a coal road based on a single offset pair observation system. The method comprises the following steps: arranging a shot point on a coal road head-on base board position and exciting an earthquake wave, determining a diffracted wave wave train of the breaking-loss wing coal seam breakpoint, selecting one period of diffracted waves with the maximum amplitude value in the diffracted wave wave train and calculating a main-polarization direction of the diffracted waves, drawing a radial on the condition that a demodulator probe is used as an endpoint and an anticlockwise inclined angle between the radial and a horizontal line of the demodulator probe is beta, finding out time corresponding to the maximum amplitude value in the period length diffracted waves, drawing an arc on the condition that the demodulator probe is the circle center and is the diameter, calculating an intersection point of the radial and the arc, wherein the intersection point is the position of the breaking-loss wing coal seam breakpoint. The method can carry out advanced forecasting through two dynamics feature information of the main-polarization direction of the diffracted waves of the breaking-loss wing coal seam breakpoint and the amplitude, detection is accurate and easy to operate, the blank that a geophysical method is utilized to detect the breaking-loss wing coal seam in a mine is filled, and convenience is brought to mine construction.
Description
technical field [0001] The invention relates to a detection method of a lost-wing coal seam, in particular to a method for advanced detection of a lost-wing coal seam in a coal roadway based on a single artillery inspection pair observation system. Background technique [0002] In the coal roadway excavation process of mines with irregular coal seams, there are usually invalid roadway footage and blind construction drilling due to the inability to determine the position of the broken wing coal seam, which seriously affects the efficiency and safety of roadway excavation. Among them, in Yunnan, Guizhou, and Sichuan It is particularly prominent in Hunan, Jiangxi, Jiangxi and Henan regions, so it is very necessary to study fast and effective methods to detect the position of the lost wing coal seam in advance. At present, the geophysical methods in the roadway mainly include electromagnetic method, seismic and other types of geophysical technology. For the advanced detection of...
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IPC IPC(8): G01V1/40
Inventor 王勃刘盛东黄兰英路拓杨真
Owner CHINA UNIV OF MINING & TECH