Per charge: "You must have a clear path toward the opponent, and nothing can hinder your movement (such as difficult terrain or obstacles). You must move to the closest space from which you can attack the opponent. If this space is occupied or otherwise blocked, you can't charge."
"You must move before your attack, not after."
"After moving, you may make a single melee attack."
Per Stone Shield:Range 0 ft.
Effect stone wall whose area is one 5-ft. square
Duration 1 round
Saving Throw none; Spell Resistance no
"A 1-inch-thick slab of stone springs up from the ground, interposing itself between you and an opponent of your choice. The stone shield provides you with cover from that enemy until the beginning of your next turn, granting you a +4 bonus to Armor Class and a +2 bonus on Reflex saving throws. If the opponent's attack misses you by 4 or less, the attack strikes the shield instead. The stone shield has hardness 8 and 15 hit points. If the shield is destroyed, the spell ends and the shield crumbles away into nothingness. Spells and effects that damage an area deal damage to the shield.
The language on charge leads me to believe this spell would interrupt a charge. Is this the case?