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

Table 3

Flow table for introducing the elastic modulus and Poisson’s ratio parameters.

Introduced variables	Elastic modulus					Poisson’s ratio
					Results					Results
First variable	0.155	3.679			Clay minerals in	0.157	3.737			Quartz in
Second variable	0.151	4.126			Quartz in	0.154	4.237			Clay minerals in
Third variable	0.101	3.081	0.181	4.954	Calcite in	0.179	6..334	0.183	5.059	Dolomite in
Fourth variable	0.121	4.377	0.122	3.708	Siderite in	0.098	4.043	0.170	6.011	Calcite in
Fifth variable	0.099	4.253	0.143	5.144	Analcite in	0..008	0.314	0.135	5.572	End of regression
Sixth variable	0.013	0.530	0.126	4.467	End of regression