Hmm ... well, I don't know too much about getting her to stop laying eggs ... she doesn't have a mate does she? If she has been laying so many eggs you might want to consider uping her calcium intake. There are powder forms available as well as cuttlebone. But you want to make sure she is getting plenty. If she isn't getting enough then her bogy might take calcium away from her body to support egg production. What is the condition of the egg? Is it hard or is the shell kinda flimsy? If it is soft then she is already calcium deficient.
Also, make sure she is getting plenty of vitamins and try to be super vigilant about keeping her otherwise healthy ... egg binding is a serious condition that could happen otherwise. You might want to familiarize yourself with the symptoms so you can be prepared to recognize it in the future if it happens.