Study on Fracture Distribution and Local Brittleness Characteristics Based on Stepwise Regression Method

Table 4

Stepwise regression analysis results.

Regression coefficient	Elastic modulus	Poisson’s ratio
Initial coefficient	37.6374	0.2472
Quartz	20.1992	-0.0714
Potassium feldspar	0	0
Plagioclase	0	0
Calcite	-38.5568	0.0911
Dolomite	0	0.0813
Analcite	9.5781	0
Siderite	-60.0874	0
Pyrite	0	0
Clay minerals	-68.1563	0.154