Study On Strip Creep Law And Stability Of Strip Coal Pillar Underground Shengli Coal Mine

To set the three pillar mining under the important role inthe ecological environment and protection of structures,the use of strip mining way of coal mining, coal pillarstress state is more complex. Once the instability of coal pillar will cause great loss. So the research has importantsignificance of complex stress state of the stability of coal pillar.This paper is mainly the creep mechanical properties of creep theory of strip coal pillar based on dependency, long-term stability and time and then study the coal column. Through field investigation, theoretical study and FLAC3D simulation method, researching the creep of strip coal pillar, and the long-term stability of the coal pillar are analyzed.Application of FLAC3D finite difference software based Burgers model improved with a creep characteristics of coal pillar was studied by numerical simulation. Through simulation study, obtained the creep characteristic of shallow buried depth of small strip coal pillar, carries on the appraisal to the strip coal pillar long-term stability.