Roadway multi-azimuth advance detection method

An advanced detection, multi-directional technology, applied in the field of geophysical exploration, can solve the problems of large detection blind area, water insensitivity, poor orientation, etc., to achieve the effects of stable measurement signal, easy operation and improved work efficiency

Active Publication Date: 2011-10-12
HEBEI COAL SCI RES INST
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  • Application Information

AI Technical Summary

Problems solved by technology

Radio wave tunnel fluoroscopy and channel wave seismic can detect structures but not water; mine electric method and electric fluoroscopy are sensitive to water, but poor in directionality; Rayleigh wave and geological radar are good in directionality, but their range is small and they are not sensitive to water
[0006] At present, the advance detection technology of mine electrical method widely used in China can detect whether there are large water-conducting structures and water bodies within 100 m in front of the roadway, but its biggest disadvantage is that it can only detect the front of the roadway (along the roadway extension line). Direction) for detection, the control range is a line, which belongs to the category of "line detection"
There is a large detection blind area in the front side and the direction of the roof and floor within the affected range of roadway excavation

Method used

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  • Roadway multi-azimuth advance detection method
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  • Roadway multi-azimuth advance detection method

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Example 1 (see figure 2 and image 3 )

[0033] The width of embodiment 1 detection roadway is 4m, adopts TEM-47 transient electromagnetic instrument, TEM-47 transient electromagnetic instrument comprises transmitter, transmitting coil 4, receiver, receiving coil 2, preamplifier and data acquisition drawing system, The transmitting coil 4 and the receiving coil 2 are relatively independent, wherein the transmitting coil 4 is a square coil with a side length of 1 m, and the receiving coil 2 is a circular coil with a diameter of 1 m.

[0034] First of all, cut off all the industrial power supplies in the roadway, make the roadheader retreat 20m from the front of the roadway 7, give up the free measurement space that can be detected, and remove the metal parts in the free measurement space, so as not to cause damage during the test process. Various interference signals; then use the TEM-47 transient electromagnetic instrument to conduct advanced detection of the roadway...

Embodiment 2

[0046] Example 2 (see Figure 4 and Figure 5 )

[0047] The difference from embodiment 1 is that during the detection process, embodiment 2 uses the slope regulation method for orientation, and the specific steps of the slope regulation method are as follows:

[0048] (1) Synchronously adjust the transmitting coil 4 and the receiving coil 2, the receiving coil 2 is placed in the middle of the rear edge 6 of the bottom surface of the measurement construction area, and the transmission coil 4 is placed on the bottom surface of the measurement construction area In the middle of the front edge 5, the center points of the opposite end faces of the two coils are located on the horizontal azimuth reference plane, and the opposite end faces of the two coils are parallel to the head 7 of the roadway; the transmitting coil 4 and the receiving coil 2 are placed along the two coils The longitudinal central axes of the opposite end faces rotate synchronously and horizontally in the coun...

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Abstract

The invention discloses a roadway multi-azimuth advance detection method for detecting the water body or other bad geologic bodies at the head and periphery of a roadway when the roadway is excavated. The method comprises the following steps: firstly, cutting off all the commercial power supplies in the roadway and eliminating the metal pieces in the measuring space of the roadway; and then, carrying out the multi-azimuth advance detection on the roadway by adopting a distributed measuring mode by utilizing a transient electromagnetic instrument, wherein the detection azimuth is determined by utilizing a geometric orientation method or a gradient rule orientation method in the detection course. In the method disclosed by the invention, the one-dimensional detection of the conventional advance detection is expanded into the multidimensional detection; the hidden water bursting danger conditions in the excavation sweep range of the roadway can be investigated to the maximum limit, thereby providing geophysical prospecting technical basis for the excavation safety. In the method disclosed by the invention, the detection range and detection distance of the head advance detection of the roadway are expanded; the detection efficiency is greatly enhanced; and the practical significances on the aspects of guaranteeing the excavation safety, coordinating the rapid excavation of high-yield and high-efficiency mines and enhancing the production efficiency are great.

Description

technical field [0001] The invention relates to a roadway advanced detection technology, belonging to the field of geophysical exploration, in particular to a roadway multi-directional advanced detection method for detecting water-bearing bodies or other unfavorable geological bodies in front of and around the roadway during roadway excavation. Background technique [0002] Water inrush is the second biggest killer that threatens the safety of coal mines in my country, and its degree of harm is second only to gas accidents. From 1995 to 2006, there were 1,424 water inrush accidents across the country, resulting in 5,432 deaths and an economic loss of more than 20 billion yuan. Among them, tunneling water inrush accounts for more than 70% of the total water inrush, and its degree of harm is the highest among all types of water inrush. [0003] At present, the geophysical methods commonly used in coal mine water inrush structures in my country include: drilling, surface geoph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/30
Inventor 杜木民李玉宝孙吉益王玺瑞李智文崔焕玉赵立松周兴国张根良李全明武延辉郭培鹏周杰民
Owner HEBEI COAL SCI RES INST
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