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大屯煤电(集团)有限责任公司姚桥矿井1976年12月建成投产,1986年该公司委托北京煤炭设计研究院进行改扩建初步设计,矿井改扩建年设计生产能力由120万ｔ到300万ｔ。1990年12月破土动工建设,1997年12月建成投入试生产,今年3月10日顺利通过验收移交生产。通过2年的试生产证明,各个
Taitun Coal and Electricity (Group) Co., Ltd. Yaoqiao Mine completed and put into production in December 1976, the company commissioned the Beijing Coal Design and Research Institute in 1986 to carry out the preliminary design of reconstruction, mine renovation and expansion of the design production capacity from 1.2 million t to 3 million t. December 1990 ground breaking construction, completed in December 1997 trial production, March 10 this year, passed the acceptance of the transfer of production. After 2 years of trial production proved that all