Gas discharge characteristic-based outburst danger early warning method
A technology that highlights danger and gas gushing, and is applied in the direction of earth cube drilling, mining equipment, mining equipment, etc. It can solve the problems of large error, fast mining speed of working face, large error, etc., and achieve high accuracy and automation level, Effect of Convenience Improvement
Active Publication Date: 2013-06-12
CHINA COAL TECH ENG GRP CHONGQING RES INST
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Problems solved by technology
[0004] (2) The advantage of automation is not obvious
Traditional technology cannot reflect the advantages of non-contact and automation technology due to the need to enter too many parameters
[0005] (3) It cannot meet the needs of high-yield and high-efficiency mine early warning accuracy
Experiments have found that when the mining speed of the working face is too fast, generally exceeding 7m / d, the falling coal gas has been transported away from the working face before being fully desorbed, resulting in a large error, and the faster the mining speed, the greater the error
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[0046] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings; it should be understood that the preferred embodiments are only for illustrating the present invention, rather than limiting the protection scope of the present invention.
[0047] figure 1 It is a flow chart of the early warning method for outstanding hazards based on the characteristics of gas gushing, figure 2 It is a frame diagram of the early warning method for outstanding risks based on the characteristics of gas gushing, image 3 In order to compare the effect of method 1 with the desorbable gas content measured by DGC, Figure 4 In order to compare the effect of method 2 with the desorbable gas content measured by DGC, Figure 5 For the comparison effect of the desorbable gas content measured by the present invention and DGC, as shown in the figure: a method for early warning of outstanding danger based on the characteristics of ...
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The invention relates to the technical field of coal mine safety, in particular to a method for early warning an outburst danger in front of a working surface by utilizing gas discharge characteristics of the working surface. The method comprises the following steps of: acquiring shape design characteristic parameters of a roadway, an air volume of the roadway and the construction speed of the roadway; acquiring real-time gas monitoring data from a coal mine gas monitoring system, and calculating a minute mean value of the gas discharge monitoring data and a movement minimum value within 30 minutes; acquiring gas discharge amount characteristic values; and early warning the outburst danger in front of the working surface in real time according to the data, and evaluating a drainage effect of the working surface according to the data. Compared with the other gas discharge early warning (prediction) technologies, the method has the advantage that a great number of field tests show that the outburst early warning real-time performance, the accuracy and the convenience are remarkably improved.
Description
technical field [0001] The invention relates to the technical field of coal mine safety, in particular to a method for early warning of outstanding danger based on gas gushing characteristics. Background technique [0002] The research principle of most outburst prediction technologies is to study and measure or predict the development status or development trend of the three outburst factors affecting the coal mass gas content, in-situ stress, and coal mass structure in front of the working face through different means, and to use this to predict the development status of the working face. Predict or evaluate the outburst risk (the K1 value of the cuttings desorption index is a comprehensive measurement of the coal body structure and gas content, and the cuttings volume index is a comprehensive measurement of the ground stress and coal body structure). At present, two technologies have appeared in the industry, "method for measuring coal gas content by inversion of gas emis...
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Inventor 胡千庭邹云龙文光才赵旭生孙东玲张庆华韩文骥邓敢博唐韩英刘文杰何亚波
Owner CHINA COAL TECH ENG GRP CHONGQING RES INST