**2.7 Investigation procedure**

Experiment procedure involves (**Figure 7**) selection of study area in fractured and non-fractured rock mass, conducting hydraulic fracturing tests in study area by

**Figure 6.**

*Cores retrieved from the borehole at (a) and (b) powerhouse area; (c) intake drift.*

*Hydraulic Fracturing in Porous and Fractured Rocks DOI: http://dx.doi.org/10.5772/intechopen.106552*

**Figure 7.** *Flowchart describing methodology and experimental procedures.*

high flow rate in fractured rock mass and normal flow rate in non-fractured rock mass. At last, compare the results obtained with fractured and non-fractured rock mass and concluding with results.

After the hydraulic fracturing assembly was positioned at a pre-determined test section where the rock mass is highly fractured (selected based on core inspection **Figure 6**). The back flow from the fracture into the interval section was observed by short valve closures during the venting phase. Finally, the packers were deflated, and tool was moved to the next test section. After all the hydraulic fracturing tests were conducted in all the boreholes, an impression packer tool with a soft rubber skin was run into the holes to obtain information of the orientation of the induced or opened fracture traces at the borehole wall (**Figure 8**).
