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A method for evaluating pressure relief effect of coal seam blasting

A technology of blasting pressure relief and evaluation method, applied in the direction of seismic signal receiver, etc., can solve the problems of lack of pressure relief effect of coal seam blasting, difficulty in determining whether the impact danger in dangerous areas is relieved, and difficulty in rational design of blasting parameters, etc., to improve the evaluation effect. , Improve the monitoring accuracy and the effect of reliable results

Active Publication Date: 2019-12-17
CCTEG COAL MINING RES INST
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Problems solved by technology

However, there is currently no effective evaluation method for the pressure relief effect of coal seam blasting, which makes it difficult to judge whether the impact hazard to the dangerous area is relieved, and also brings difficulties to the reasonable design of blasting parameters.

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  • A method for evaluating pressure relief effect of coal seam blasting
  • A method for evaluating pressure relief effect of coal seam blasting
  • A method for evaluating pressure relief effect of coal seam blasting

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Embodiment Construction

[0047] In order to make the purpose, technical solution and advantages of the present invention clearer, the implementation manners of the present invention will be further described in detail below.

[0048] The method for evaluating the pressure relief effect of coal seam blasting comprises the following steps:

[0049] (a) Arrange a microseismic monitoring system and several microseismic sensors underground in the coal mine;

[0050] (b) Arrange 3-6 coal seam blast holes as test holes outside the scope of impact of mining, and the parameters of the test holes are consistent with those of the pressure relief holes for blasting;

[0051] (c) Blast the test hole. After the blasting, obtain the location information of the blasting event through the microseismic monitoring system. If it is not greater than 20m, it is considered that the positioning accuracy meets the monitoring requirements, otherwise modify the wave velocity model until the requirements are met;

[0052] (d) ...

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Abstract

A coal seam blasting pressure relief effect assessment method includes steps of arrangement of microseismic sensors, calculation of blast hole microseismic event energy, determination of judgment criteria and the like. The coal seam blasting pressure relief effect assessment method is high in operability and precision and reliable in result, and the problem of difficulty in quantitative assessmentof blasting effects is solved.

Description

technical field [0001] The invention relates to a method for evaluating the pressure relief effect of coal seam blasting. Background technique [0002] Rockburst is a dynamic disaster that occurs underground in coal mines due to the sudden release of elastic energy accumulated in coal and rock mass during mining activities, resulting in instant throwing of coal and rock mass, roadway damage and even casualties. [0003] Rock burst is one of the main disasters faced by coal mining. With the continuous increase of coal mining depth, rock burst disasters and a series of accidents caused by it, such as gas, water inrush and mine earthquakes, have become more and more serious and common. At present, coal seam blasting is a common method for preventing and relieving rock burst. Compared with methods such as large diameter coal seam pressure relief, it has the advantages of large pressure relief range and quick results. However, there is currently no effective evaluation method f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/18G01V1/20
CPCG01V1/18G01V1/20
Inventor 夏永学潘俊锋王书文冯美华
Owner CCTEG COAL MINING RES INST