Division method for underground coal bed outburst and dangerous zones

Abstract

The invention discloses a division method for underground coal bed outburst and dangerous zones and relates to a method for dividing the outburst and dangerous zones of a coal mine underground coal bed. The division method for the underground coal bed outburst and dangerous zones includes the following steps: 1. according to coal bed gas geological basic information, geological units of the coal bed are divided; 2. pressure testing points are arranged in the geological units, latitude and longitude coordinates of the pressure testing points are recorded, and original gas pressure of the point in the coal bed are tested quickly; 3. a soft layer coal sample is adopted, the temperature of the coal bed is tested, and original discharge gas dilatation energy is tested; 4. SUFFER software is used to draw a contour graph of the original discharge gas dilatation energy in the coal bed; 5. the drawn contour graph of the original discharge gas dilatation energy is covered on a mining engineering plane graph of the mine, zones with the original discharge gas dilatation energy bigger than 42.98 mj / g in the coal bed are divided as outburst zones, zones with the original discharge gas dilatation energy smaller than 42.98 mj / g in the coal bed are divided as non-outburst zones, and therefore an important role is played to the safety of mining operation in the coal bed.

Description

technical field [0001] The invention relates to an underground coal seam outburst dangerous area division method, and is especially suitable for coal mine disaster prediction. Background technique [0002] At present, the division method of underground coal seam outburst dangerous area is based on the coal seam gas parameters combined with the method of gas geological analysis. Article 43 of the "Regulations on the Prevention and Control of Coal and Gas Outbursts" stipulates the method and critical value of gas pressure or gas content for prediction: predict according to the coal seam gas pressure P, if there is no or lack of coal seam gas pressure data, it can also be based on Coal seam gas content W is predicted. The critical value based on the prediction should be determined according to the experimental investigation, and can be temporarily predicted according to the table before being determined. [0003] Critical value for regional prediction based on coal seam gas p...

AI Technical Summary

Problems solved by technology

However, the prediction and indicators used by this prediction method, whether it is gas pressure or gas content, the critical value of prediction is different for different mines and coal seams, and it is difficult for each mine to test and inspect the critical value of indicators by itself. The critical values ​​recommended in the "Regulations on the Prevention and Control of Coal and Gas Outburst" are almost always used, which may not be consistent with the actual situation of the mine, so that low index outburst may occur, that is, in areas where there is no risk of outburst predicted according to the recommended critical value, there may be Prominence occurs, which has been verified by a large number of on-site practices, and poses a greater threat to on-site safety production

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