Failure mechanism and control technology of coal pillar for Anyang Coal Mine
The coal pillar in the section of the fully mechanized mining face serves as a protective coal pillar for the safety passage of the working face.It is not only a component of the return air roadway of the working face,but also a component of the auxiliary transportation roadway of the next working face.The rationality of its reserved width is not only related to the safety and stability of the working face channel,but also affects the mining recovery rate of the mine.It is one of the difficul-ties that restrict the safe and efficient production of the coal mine.If the section coal pillar is left too large,it not only causes a waste of coal resources,but also causes the overlying roof of the section coal pillar to hang over a large area near the goaf under the support effect,and some water conducting fracture zones cannot be effectively closed.If the coal pillars in the sec-tion are too small,they cannot support the load and during the mining process of the working face,deformation and damage can easily occur along the groove,causing the leakage of water and harmful gases in the goaf.We combine the actual situa-tion of Anyang Coal Mine and adopt research methods such as on-site monitoring,theoretical analysis,and numerical simula-tion to propose reasonable coal pillar parameters and coal wall support technology in order to guide actual on-site work.The research results of this article are of great significance for the maintenance of the surrounding rock of dynamic pressure tun-nels,the safe and efficient production of coal,and the improvement of coal resource recovery rate.At the same time,it has certain guiding significance for the reasonable setting of coal pillars for roadway protection in the similar mine working face sections.
国家科技期刊平台
NSTL
万方数据
维普
