Pros
It is a good place to learn....You get to learn all the necessary stuff regarding mines ...The companies motto is "All men ,all work " So , even you are from any field of engineering , at the end of the year you would be knowing all the things whether it is regarding machines used or regarding mining prospects ....The services provided in the guest house (hostel) are very good and your expenses would be very less...less expenses means more savings ...It is a very good place for diploma holders ...diploma holders gets good pay in joy mining than any other company in india ...
Cons
The designation offered to a fresher is not good ...both diploma holder and b.tech holder gets the designation of formen ....so , if u are from B.tech or B.E , u wont have any extra edge over the diploma holder ...unlike other companies where u are always treated above diploma holder ...Thus , if you want to switch to some other companies from joy mining ,then your past designation would be of a formen ...so ,this would act against u and may be u won't be getting a good designation in the new company...