Establishment of the prediction model of coal and gas outburst energy and its application in Pingdingshan mining area
LI Chengwu
FU Shuai
XIE Beijing
ZHANG Mingjie
DONG Lihui
WANG Feiyin
XUE Honglai
Abstract：In order to make a prediction of outburst energy,considering the pressure relief zone around outburst cavity and introducing the concept of equivalent radius,prediction models of outburst energy were established.Taking Pingdingshan mining area as an example,the outburst energy in some mines of this area was predicted.Then,distribution pattern of outburst energy in this area was revealed.Finally,the distribution and intensity of outburst accidents were used to verify the predicted results.The results show that it presents a good power relation between the equivalent radius of pressure relief circle and outburst cavity,the expression is R =1.8886r0.9351 Elastic energy of unit volume coal is 1.0-6.5 times bigger than gas expansion energy and accounts for 52％-87％ of total energy,it is the main energy in outburst.Insitu stress is the key index of the energy prediction and is the main controlling effect of outburst.Outburst energy and buried depth present a linear positive correlation.No.5 coal mine in the northwest has low outburst energy.Energy in No.8,No.10 and No.12 coal mines are higher.Prediction results are consistent with the actual situation of coal mines,which proves that the prediction model is feasible.
Keywords：coal and gas outburstelastic energy of coalgas expansion energyprediction modelequivalent radius of pressure relief coal
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 231-239 )