collected in dust collector 50 the dust which passes through second duct assembly 90 then passes through cross over portion 92 to end portion 94 and therethrough to first duct assembly 47 where the duct is collected in dust collector 50 as described dust collecting system 42 withdraws airborne dust from the area adjacent mine face 36 for the safety of the mining machine 10 operator sliding joints 41 formed from first duct assembly 47 and boom assembly 22 and from second duct assembly 90 and boom assembly 22 allow collecting system 42 to draw airborne dust away from mine face 36 as boom assembly 22 is pivoted upwardly and downwardly on mobile frame assembly 12 in both embodiments of the invention mining machine 10 also includes a conveyor system generally designated by the numeral 54 conveyor system 54 extends longitudinally from the front end 26 of mobile frame assembly 12 to a location rearwardly of the rear end 46 of mobile frame assembly 12 conveyor system 54 includes a conveyor first section 56 which extends longitudinally through the center of mobile frame assembly 12 conveyor system 54 also includes a conveyor second section 58 which extends rearwardly to the rear end 46 of the mobile frame assembly 12 and is pivotally connected to the conveyor first section 56 for lateral movement relative to conveyor first section 56 in this manner conveyor second section 58 can be suitably positioned to deposit material provided to conveyor system 54 by dislodging head 30 at a preselected location rearwardly of rear end 46 of mining machine 10 further as illustrated in phantom in.