SEO Analysis regarding huge table upload +posts on a website

I want to upload 10,000 short posts on my well maintained parenting blog in 2days. The frequency of update till last month was 4 posts a week, last month 2 posts a week. Now I have to upload a list which is a huge table with 10,000 rows, every entry will have a separate customized post for same contents. so 10,000 unique micro posts (100 words a post). This will be done in 2 days. I want to get expert advice on how to handle this to not to harm website's Google ranking. (Current traffic is 4.5K unique visits a day) This new change is important. so Is there any way to inform search engine thru webmaster tool or something in advance which will help me keep my website's stats n ranking. My competitors have this type of contents so must be some safe way to upload it.