A New Approach for Estimating Rock Discontinuity Trace Intensity Based on Rectangular Sampling Windows

Table 1

Estimated intensity and its % error based on rectangular sampling windows.

Window size (m)/location number	Estimated value (m^−1)		True value (m^−1)		% error of Ie
	Set 1	Set 2	Set 1	Set 2	Set 1	Set 2
90 × 45/location 1	0.114	0.092	0.084	0.088	−36.3	−4.8
90 × 45/location 2	0.223	0.073	0.227	0.053	1.6	−38.9
90 × 45/location 3	0.182	0.152	0.189	0.125	3.5	−21.8
90 × 45/location 4	0.093	0.111	0.081	0.082	−14.9	−34.9
110 × 55/location 1	0.128	0.096	0.096	0.091	−33.8	−6.1
110 × 55/location 2	0.207	0.091	0.216	0.069	4.3	−32.4
110 × 55/location 3	0.179	0.128	0.179	0.126	0.4	−1.7
110 × 55/location 4	0.101	0.091	0.084	0.085	−20.0	−7.1
130 × 65/location 1	0.142	0.097	0.106	0.093	−34.7	−3.7
130 × 65/location 2	0.174	0.088	0.203	0.078	14.0	−13.2
130 × 65/location 3	0.171	0.110	0.173	0.122	1.2	9.6
130 × 65/location 4	0.092	0.096	0.086	0.087	−6.9	−10.0
Mean value	0.151	0.102	0.144	0.091	4.8	11.6
Coefficient of variation	0.299	0.205	0.409	0.247
Range					−36.3 to 14.0	−38.9 to 9.6