Lateral Roof Structure of Island Working Face and the Technology of Roof Cutting Pressure Relief
Aiming at the island working face mining back to the mining roadway by the strong mining pressure control difficulties,taking Shanxi Huineng Coal Industry 15102 island working face as the background of the project,the island working face roof lateral structure and its impact on the stability of the back to the mining roadway,was studied and put forward to cut the top cutting of the unpressurised technology was proposed to protect the roadway.The results show that the lateral roof structure of the isolated island working face can be divided into deformation and elasticity deformation zone,and the mobile deformation zone is the source of stress increase,and blasting and cutting the top of the lateral roof rock layer in the mobile deformation zone can reduce the impact of the roof instability on the return roadway.Using FLAC3D numerical simulation software,the effects of various roof-cutting schemes were analysed,specific roof-cutting parameters were given,the scheme of roof-cutting to protect the stability of the roadway was clarified,and field tests were conducted.After cutting the top,the deformation of the roadway peripheral rock is significantly reduced,and the effect of cutting the top is good,which provides a reference for the stability control of the back-mining roadway in similar isolated island working face.
island working facemining roadwaystability controlroof cutting pressure relief
万方数据
维普
