Joy Mining Machinery provides cost effective mining equipment and support for the extraction of underground coal and other bedded materials such as gypsum, lignite, phosphate, potash, salt and trona. The company offers comprehensive service center locations near major mine sites worldwide. Nearly 90 percent of the company s underground mining business relates to coal. Both Joy Mining Machinery and P&H Mining Equipment are divisions of Joy Global, a worldwide mining machinery company that employs approximately 7,000 in more than 20 countries. Joy Mining Machinery maintains a location in Warrendale, Pa.