Service Life Prediction of Shaft Sidewall Exposed to Sulfate Environment

Table 1

Chemical composition of seepage water (mg/L).

Number	Na^+	Mg^2+	Ca^2+	CO3^2−	Cl^−	SO4^2−	pH
1	362.1	160.6	378.9	95.8	236.9	1748.0	7.60
2	556.4	111.7	291.7	69.9	181.7	1860.2	7.54
3	626.6	101.8	227.7	91.7	176.7	1867.5	7.85
Average	515.0	124.7	299.4	85.8	198.4	1825.2	7.67