Case Studies of Comprehensive Gas Control Method during Fully Mechanized Caving of Low-Permeability Ultrathick Coal Seams

<div>Layout of hydraulic fracturing borehole. (a) Plane of hydraulic fracturing borehole. (b) Profile of hydraulic fracturing borehole.</div>

Geofluids

Figure 6: Case Studies of Comprehensive Gas Control Method during Fully Mechanized Caving of Low-Permeability Ultrathick Coal Seams 