Application of numerical simulation technology in withdrawal process in Suancigou Coal Mine

Withdrawing technology at fully mechanized working face is an important part of production and preparation, the speed of withdrawal affects the realization of high yield and efficiency of mine. In the process of fully mechanized working face being close to withdrawal roadway, advanced abutment pressure seriously affects the withdrawal roadway and double crossheading, vertical stress of the withdrawal roadway and double crossheading increase, and roadway deformation is aggravated. Roof caving accidents are easily happen so that they directly affect the speed of withdrawing and the normal continuation at the working face. Through FLAC numerical simulation about withdrawal process at No.6105-1 Panel in Suancigou Coal Mine, date of roadway roof and two sides roadway stress and deformation can be achieved, provide theoretical basis and guidance for the on-site construction, ensure that withdrawing work safely and smoothly be done.