Method for judging relative bursting liability of coal body

Abstract

The invention discloses a method for judging relative bursting liability of a coal body. An on-site coal sample is subjected to a conventional test; a test sample is manufactured and then is subjected to a relative test to obtain relative bursting liability index test standards; when the bursting liability of a certain coal seam needs to be tested, a coal briquette is take on site and treated into coal powder; a standard test sample is subjected to a bursting liability test in a laboratory by utilizing a pressure machine; an obtained testing result is compared with a relative test index system to determine the intensity of the bursting liability of the certain coal seam. According to the method disclosed by the invention, the coal body is subjected to a relative test index and serious influences on a testing result, caused by inner defects of the coal seam, are avoided; the bursting liability of the coal seam can be really reflected and the method has an active effect on preventing and treating bursting ground pressure.

Description

technical field [0001] The invention belongs to the technical field of coal mining. Background technique [0002] The causes of rock burst include internal and external factors. The internal cause mainly refers to the impact tendency of the coal seam itself, and the external cause mainly refers to some dynamic phenomena caused by mining activities. Such as coal and gas outburst, rock burst, coal explosion, etc., are often related to the impact tendency of coal itself. With the increase of mine mining depth, the dynamic disasters caused by the impact tendency of coal seams are becoming more and more serious. At the same time, due to the complexity of the boundary conditions of mine mining, the dynamic disasters and phenomena caused by geological structures and faults are becoming more and more serious. . Before a large dynamic disaster occurs, it is the premise of controlling the dynamic phenomenon to be able to detect the impact tendency of the mined coal seam and then tak...

AI Technical Summary

Problems solved by technology

[0003] The coal seam impact tendency test is generally carried out in the laboratory with a press. First, take the sample and make a standard test piece (100mm in height, 50mm in diameter; 100mm in height, 50mm in length and width), and then perform a routine test on the press. T