765 ILCS 505/2
If the owner of any land adjacent to any lands worked as lead, coal, iron or other mine, shall file a complaint, verified by affidavit, in the circuit court in the county where the land is situated, that he or she has reasonable grounds to believe, and does believe, that the owner or operator of such mine is trespassing upon his or her lands by mining thereon, it shall be the duty of the court to appoint a surveyor licensed under the provisions of the Illinois Professional Land Surveyor Act of 1989, as amended or other competent and suitable person to descend into such mine, and make such examinations and surveys as may be necessary to ascertain whether the same is being worked upon the land of the person filing the complaint.
765 ILCS 505/2