A.原巖應(yīng)力B.巷道頂?shù)装逦锢砹W(xué)性質(zhì)C.巷道圍巖松動(dòng)圈D.巷道圍巖鉆孔結(jié)構(gòu)E.錨桿(索)極限拉拔力
A.Ⅰ類B.Ⅱ類C.Ⅲ類D.Ⅴ類
A.經(jīng)驗(yàn)類比法B.水壓致裂法C.聲波法