Not if environmentalists also managed to shut down or replace consumers of coal, such as power plants. Since power plants are usually run by utility companies

Not if environmentalists also managed to shut down or replace consumers of coal, such as power plants. Since power plants are usually run by utility companies that often have governments as major shareholders and the general public (including environmentalists and people sympathetic to their goals) as direct customers, they are more likely to be receptive to pressure than coal mines, which are often privately held corporations that sell into the anonymity of bulk markets.