1. You are silent whether your grand father has divided the land among your father and uncles in sharers or not . 2. If your grand father has died without making the division of his properties then all his sons and daughters have equal shares in the land, 3. Now of any o0f them is causing problem to give due share to another or is forcibly occupying more land than others then any of them can file suit for partition and separate possession. 4. They can apply for injunction as well so the land in possession of any co sharer may remain is his peaceful possession till final decision of the court comes.