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湖南省煤田地质勘探公司二队1987年提交的《湖南省涟源市渣渡矿区良相桥井田煤矿精查地质报告》去年由全国储委评为优秀地质报告。井田勘探面积20km~2,共施工钻孔82个,获A+B+C储量2703万t,高级储量占28.2％,且分布合理。同时对煤系上覆的梓门桥组中三层石膏做了综合评价,提交D级储量13911万t。总投资286.82万元,万米进尺获煤储量747万t,吨煤勘探成本0.106元。这样的经济效益在南方是难得的。
Hunan Province Coalfield Geological Exploration Company two teams submitted in 1987, “Lianyuan City, Liubing Mining Area Liangxiang minefield geological survey of coal mine” last year by the National Committee of the Reserve as excellent geological report. Minefield exploration area of 20km ~ 2, a total of 82 borehole construction, get A + B + C reserves of 27030000 t, advanced reserves accounted for 28.2%, and the distribution is reasonable. At the same time, a comprehensive evaluation was made on the three layers of gypsum in the Zimenqiao Formation overlying the coal series, with 139.11 million tons of Grade D reserves submitted. A total investment of 2.8682 million yuan, 10,000 meters into the coal reserves of 7.47 million tons, tons of coal exploration costs 0.106 yuan. Such economic benefits are rare in the south.