Search engine spamming question

Is this a black hat technique?

I have a domain and would like to target multiple keywords

eg. uraniumtesting dot com

i would like to target keywords

uranium stocks
uranium investing
uranium mining
etc.etc.

Is it black hat if i add pages on my site targeting those specific keywords using the following url structures

uraniumtesting dot com/uranium_stocks.html
or
uraniumtesting dot com/uranium_investing.html
or
uraniumtesting dot com/uranium_mining.html

Is this black hat???? i do not believe it is.

No...