A.接近承壓含水層或者含水的斷層、流砂層、礫石層、溶洞、陷落柱時(shí),應(yīng)當(dāng)探水前進(jìn)
B.接近與地表水體相通的地質(zhì)破碎帶或者接近邊通承壓層的未封鉆孔時(shí),應(yīng)當(dāng)探水前進(jìn)
C.接近積水的老窯、舊巷或者灌過(guò)泥漿的采空區(qū)時(shí),不應(yīng)當(dāng)探水前進(jìn)
D.發(fā)現(xiàn)有出水征兆時(shí),不應(yīng)當(dāng)探水前進(jìn)