How to pre-pay home loan faster – How should I do that ?

Hi

I took 57 Lac Home Loan in 2011 and paying EMI every month 55K, so since then i have already paid 19 lac i guess but the principal reduced only 2lac, now i have little cash flow to pay more EMI per month, say 85K, so i want to understand if i increase my EMI will extra money which i am going to pay every month directly reduce my Principal or how it work ?

Any suggestion is highly appreciated.