Cave found on preshift - Fallen material a undected slick & slide seen in roof a small coal rider was also noticed on outby side of cave about 1/2 thick or less. Entry witdth inby cave was 17'6"" wide and outby cave was 18' 6"". The slick & slide would not been seen during morning cycle cave was located in #4 entry of D3A but between last open xcut and next one back.