Prediction method for coal and gas outburst based on seismic information
A gas outburst and seismic information technology, which is applied in the intersection of applied geophysics and mining engineering, and can solve problems such as the inability to obtain the distribution law of gas enrichment in coal seams, the failure to consider multiple influencing factors at the same time, and the lack of quantitative evaluation.
A gas outburst and seismic information technology, which is applied in the intersection of applied geophysics and mining engineering, and can solve problems such as the inability to obtain the distribution law of gas enrichment in coal seams, the failure to consider multiple influencing factors at the same time, and the lack of quantitative evaluation.
CN104850897AInactive Publication Date: 2015-08-19CHINA UNIV OF MINING & TECH
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[0044] The present invention is further elaborated below.
[0045] A method for predicting coal and gas outburst based on seismic information, including the following main steps:
[0046] (1) According to the mine geological conditions in the coal mining area, determine the main geological factors that affect the occurrence and outburst of coal seam gas;
[0047] (2) Carry out quantitative result classification to the main geological factors determined in step (1) according to the classification criteria of each main geological factor affecting coal seam gas occurrence and outburst;
[0048] (3) According to the contribution of each geological factor to gas outburst, determine the weight coefficient ω of the main geological factor i value;
[0049] (4) Using the comprehensive index method to introduce the concept of gas outburst risk coefficient G value, then i is the value of the classification number of geological factors, that is, the i-th geological factor that affects...
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The invention discloses a prediction method for coal and gas outburst based on seismic information. The prediction method includes following steps: determining main geological factors for affecting coal seam gas occurrence and outburst according to the mine geological condition of a coal mining area; classifying the geological factors according to the classification criterion of the factors for affecting the coal seam gas occurrence and outburst; determining the weight coefficient Omegai value of the main geological factors according to the contribution of various geological factors to the gas outburst; calculating the gas outburst danger coefficient G value and the gas outburst hazard index R value; and predicting and evaluating the coal seam gas outburst regarding the gas outburst hazard index R value as the evaluation index. According to the prediction method, the main geological factors for affecting the coal seam gas occurrence and outburst are quantified by the adoption of various lithological seismic methods, the prediction and evaluation method for the coal and gas outburst based on the seismic information is proposed, deformed coal development areas and gas enrichment areas related to gas outburst are evaluated and predicted, and important technical support is provided for the prevention of the coal mine gas outburst.
Description
technical field [0001] The invention relates to a method for predicting coal and gas outburst based on seismic information, and belongs to the technical field where applied geophysics and mining engineering intersect. Background technique [0002] Gas is a mixed gas mainly composed of methane that is formed by coalification and exists in coal seams. Coal and gas outburst refers to coal mine disasters in which various harmful gases released from coal seams, rock formations and goafs are enriched and gushed out on the working face during the production process of coal mines, thereby causing gas explosions. [0003] 46% of China's coal mines are high-gas mines with high gas content and low coal seam permeability, making it difficult to drain gas before mining. In addition, my country's coalfield structure is very complex and the ground stress is large, and gas outbursts are prone to occur during mining. With the gradual increase of mining depth, the number and degree of coal a...
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Patent Timeline
19 Aug 2015
Publication
CN104850897A
- IPC
- G06Q10/04
- Inventors
- 崔若飞; 陈同俊