Study on prediction model of coalbed methane extraction production in goaf of Yuecheng Mine

Abstract

A large number of mined-out areas are formed in the production of coal mines, which contain rich coalbed methane resources. If the coalbed methane resources in the mined-out areas are allowed to escape into the atmosphere, it will not only cause a waste of resources, but also pollute the environment and affect the underground production safety. Therefore, it is of great significance to the utilization of coalbed methane resources in the mined-out areas. However, due to the complex environment of mined-out area, the research on the prediction of coal bed methane extraction production in mined-out area has been few, and the coal bed methane extraction amount in mined-out area has a large randomness, so it can not be accurately predicted. Therefore, according to the actual pumping situation of YCCD-02 well in Yuecheng Mine, combined with the pumping curve of surface well, the prediction model of coalbed methane pumping production in goaf was calculated, and the accuracy was verified by the evaluation results of goaf resources.