枣滕矿区是国家“七五”、“八五”期间重点建设的大型现代化煤炭生产基地之一,建设规模1050吨。在建设、设计、施工单位的共同努力下,目前已建成投产规模420万吨,在建规模410万吨。“七五”期间,完成国家基建投资76622.92万元,年年完成国家投资计划。单项工程概算投资除政策性调增因素外,基本达到投资控制,取得较好的投资效益。如1989年建成投产的蒋庄矿井(150万吨),吨煤投资为191.06元,是全国同类矿井中的较低水平。1990年国家审计署对蒋庄、田陈(120万吨)两对矿井的项目决策、计划、概、预(结)算、资金来源及运用、材料、设备购置和使用等方面进行审计,评定 Zao Teng Mining Area is one of the large-scale modernized coal production bases under key construction during the “Seventh Five-Year Plan” and “Eighth Five-Year Plan” period of the country with a construction scale of 1050 tons. With the concerted efforts of construction, design and construction units, the production scale has been completed and put into operation 4.2 million tons and the scale under construction is 4.1 million tons. During the “Seventh Five-Year Plan” period, a total of 766.2292 million yuan of state infrastructure investment will be completed, and the state investment plan will be completed every year. The estimated investment of a single project in addition to the policy of regulatory factors, the basic investment control to achieve better investment returns. For example, the Jiangzhuang Mine (1.5 million tons) completed and put into operation in 1989 has an investment of 191.06 yuan per ton of coal, which is the lower level among similar mines nationwide. In 1990, the National Audit Office audited and assessed the project decision-making, planning, summary (preconsolidation) calculation, sources and utilization of materials, acquisition and use of materials and equipment of two coal mines of Jiangzhuang and Tianchen (1.2 million tons)