An evaluation method for predicting the risk of rock burst in coal mines
A rockburst and dangerous technology, applied in mining equipment, surface mining, mining equipment and other directions, can solve the problems of different degrees of impact of rockburst, complex causes, and many influencing factors, and achieve targeted, effective, Achieve computable and quantifiable, comprehensive effects
Active Publication Date: 2015-10-21
CHINA UNIV OF MINING & TECH
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Problems solved by technology
[0004] The purpose of the present invention is to provide an evaluation method for predicting the risk of rock burst in coal mines, to solve the problem that the causes of rock burst are complex, there are many influencing factors, and each factor has a different degree of influence on the risk of rock burst, resulting in inaccurate analysis results The problem
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Embodiment 1
[0018] Embodiment 1: This method divides the rockburst hazard degree into 4 grades and states of A-level non-burst rockburst hazard, B-level weak rockburst hazard, C-level medium rockburst hazard and D-level strong rockburst hazard , and formulate corresponding prevention and control countermeasures according to different rockburst hazard levels and states; analyze and evaluate the weight of the influence of geological and mining factors in the mining area on rockburst by comprehensive index method, and calculate the risk index of the two respectively , and take the maximum value as the final comprehensive index of rockburst hazard, based on which the hazard level, state and prevention and control measures of rockburst in the mining area are determined.
[0019] The geological factors analyzed and evaluated by the comprehensive index method include 7 geological factors affecting rock burst occurrence history, mining depth, and the distance between the hard thick rock layer and ...
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The invention discloses an assessment method for predicting underground rock burst danger of a coal mine, and belongs to assessment methods for predicting the rock burst danger. Danger levels of burst mine pressure include rock-burst-free danger level A, weak rock burst danger level B, medium rock burst danger level C and strong rock burst danger level D; and accordingly, corresponding preventive measures are formulated. Weight of affections, of geological factors and mining factors of mining areas, on the rock burst is analyzed synthetically; danger indexes of the geological factors and the mining factors are calculated respectively, and the maximum value of the danger indexes is taken as a final composite index of the rock burst danger; and accordingly, danger levels, states and preventive measures of the rock burst of the mining areas are determined. The geological factors analyzed and assessed by a composite index method include rock burst occurrence history, mining depth and distance between a hard thick rock stratum in an overlying fissure zone and a coal bed; and the mining factors include pressure relief degree of a protective layer, horizontal distance between a working surface and a coal column remained from upper preventive layer mining, and relations between working surfaces and adjacent gobs.
Description
technical field [0001] The invention relates to an evaluation method for predicting the risk of rock burst, in particular to an evaluation method for predicting the risk of rock burst in underground coal mines. Background technique [0002] With the gradual increase of mine mining depth and mining range in my country, coal-rock dynamic disasters represented by rock bursts are becoming more and more serious. This dynamic disaster will cause the elastic energy accumulated in coal-rock mass to suddenly, sharply and Released in the form of coal and rock, causing vibration damage to the coal and rock mass, the power throws the coal and rock to the shaft, making a strong sound, causing damage to supports and equipment, shafts, and casualties. Know in advance when and where it will happen. At present, the research on rock burst mainly focuses on three research aspects, one is the research on the mechanism of rock burst (rockburst); the other is the research on the risk assessment, m...
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IPC IPC(8): E21F17/00E21C41/16
Inventor 窦林名牟宗龙贺虎温颖远易恩兵
Owner CHINA UNIV OF MINING & TECH