本次隧洞分1#排水隧洞554m/1800.54m3,2#排水隧洞80m/266.05m3,尾礦轉(zhuǎn)角井150m3,攔水壩溢洪道82m/660m3,排水斜槽94.9m/700m3,排水框架井30m3,總掘進(jìn)量為810.9m/3406.05m3,其中1#、2#排水隧洞掘進(jìn)凈斷面根據(jù)巖石硬度系數(shù)確定巷道斷面,當(dāng)F ≤4時,掘進(jìn)斷面4.57m2,采用鋼筋砼澆注支護;當(dāng)F=4-6時,斷面為2.76m2,噴鉚砼支護,當(dāng)F≥6時,為2.76m2,不需砼支護,總砼支護量根據(jù)地巖石性質(zhì)決定。