Model on surface borehole squeezing deformation fracture  

作　　者：SUN Hai-tao HU Qian-ting HUANG Sheng-shu 

机构地区：[1]Chongqing Research Institute, China Coal Research Institute, Chongqing 400037, China [2]College of Civil Engineering, Chongqing University, Chongqing 400044, China

出　　处：《Journal of Coal Science & Engineering(China)》2009年第3期304-307,共4页煤炭学报（英文版）

基　　金：Supported by the National Great Research Foundation of China(973)(2005CB221504);the National Natural Science Foundation of China(50534080);the National Key Technology R&D Program(2006BAK03B03)

摘　　要：As a good method to solve the problem of high methane on the workface and inthe goaf,drawing coal strata methane through a surface borehole is used.However,theexcavation affected the overlying rock strata greatly.When the excavation face passedthrough the surface borehole position,the surface borehole fractures fast.This problemwas seriously related to the unformed squeeze effect.Therefore,a squeezing deformationfracture model based on the rock strata squeezing effect was set up.At the same time,a3DEC simulation model is presented to confirm the theory.The result shows that the modelis reliable and has a good engineering application value.As a good method to solve the problem of high methane on the workface and in the goaf, drawing coal strata methane through a surface borehole is used. However, the excavation affected the overlying rock strata greatly. When the excavation face passed through the surface borehole position, the surface borehole fractures fast. This problem was seriously related to the unformed squeeze effect. Therefore, a squeezing deformation fracture model based on the rock strata squeezing effect was set up. At the same time, a 3DEC simulation model is presented to confirm the theory. The result shows that the model is reliable and has a good engineering application value.

关 键 词：methane drawing surface borehole squeeze effect 

分 类 号：TD712[矿业工程—矿井通风与安全] TQ323.41[化学工程—合成树脂塑料工业]