山东新汶矿业集团协庄煤矿注重矿区环保 ,在废矸、废水、废气治理上 ,变废为宝 ,综合利用 ,取得了显著经济效益 ,形成了“三废”治理的良性循环。协庄煤矿是一座年产原煤 2 0 0万ｔ的国有大型矿井 ,年排放煤矸石 2 0多万ｔ;1993年时全矿共建有燃煤锅炉 10余台 ,30 0 0多户职工 Xinhua Mining Group, Shandong Xinzhuang Mining Group focus on environmental protection mining, waste, waste water, waste gas treatment, turning waste into treasure, comprehensive utilization, and achieved significant economic benefits, forming a “three wastes” a virtuous circle of governance. Xiezhuang Coal Mine is a state-owned large-scale mine with an annual output of 20 million tons of coal, with an annual discharge of more than 20 million tons of coal gangue. In 1993, the coal mine built more than 10 coal-fired boilers and more than 300,000 workers