Adds some neat tiles and walls for use on lavaland

code/modules/mining/shelters.dm

@@ -4,12 +4,14 @@
 	var/blacklisted_turfs
 	var/whitelisted_turfs
 	var/banned_areas
+	var/banned_objects
 
 /datum/map_template/shelter/New()
 	. = ..()
 	blacklisted_turfs = typecacheof(/turf/closed)
 	whitelisted_turfs = list()
 	banned_areas = typecacheof(/area/shuttle)
+	banned_objects = list()
 
 /datum/map_template/shelter/proc/check_deploy(turf/deploy_location)
 	var/affected = get_affected_turfs(deploy_location, centered=TRUE)
@@ -24,7 +26,7 @@
 			return SHELTER_DEPLOY_BAD_TURFS
 
 		for(var/obj/O in T)
-			if(O.density && O.anchored)
+			if((O.density && O.anchored) || is_type_in_typecache(O, banned_objects))
 				return SHELTER_DEPLOY_ANCHORED_OBJECTS
 	return SHELTER_DEPLOY_ALLOWED
 
@@ -40,7 +42,7 @@
 /datum/map_template/shelter/alpha/New()
 	. = ..()
 	whitelisted_turfs = typecacheof(/turf/closed/mineral)
-
+	banned_objects = typecacheof(/obj/structure/stone_tile)
 
 /datum/map_template/shelter/beta
 	name = "Shelter Beta"
@@ -55,3 +57,4 @@
 /datum/map_template/shelter/beta/New()
 	. = ..()
 	whitelisted_turfs = typecacheof(/turf/closed/mineral)
+	banned_objects = typecacheof(/obj/structure/stone_tile)