A New Method to Improve the Fracturing Effect of Coal Seams by Using Preset Slots and Induced Stress Shadows

<div>Comparison of hydraulic fracture patterns created by hydraulic fracturing in combination with a staggered distribution of hydraulic slots under (a) low stress difference and (b) high stress difference.</div>

Geofluids

fig16

Figure 16

Figure 16: A New Method to Improve the Fracturing Effect of Coal Seams by Using Preset Slots and Induced Stress Shadows 