Research Article

Optimization and Practice for Partition Pressure Relief of Deep Mining Roadway Using Empty-Hole and Deep-Hole Blasting to Weaken Coal

Table 6

Variance analysis.

DEVSQDOFSignificance

SSA/MSA5.07/1.6985.08/28.361909.60/636.53319.61167.111311.54
SSB/MSB1.89/0.631.18/0.391.84/0.6137.322.311.26
SSC/MSC2.10/0.7019.42/6.47228.58/76.1938.1438.14156.99
SSD/MSD0.48/0.160.56/0.192.46/0.8231.871.091.69
SSE/MSE0.26/0.090.51/0.171.46/0.493
SST9.80106.742143.9415;

Note: SST is the sum of squares of total deviations; SSJ (J: -) is the sum of squares of deviations of various factors; SSE is the sum of squares of deviations of test errors; MSJ (J: -) is the mean of squares of deviations of various factors; (: -) is the degrees of freedom for various factors; is total degrees of freedom; : the statistical verification value.