4
Figure 4. Gas well casing construction and cementing details at the study site
Figure 5. FLAC3D model of a gas well passing through the longwall abutment
at the study site, along with a detailed on-site gamma log showing presence of a
thick claystone layer at 23 feet above the Pittsburgh seam
Figure 4. Gas well casing construction and cementing details at the study site
Figure 5. FLAC3D model of a gas well passing through the longwall abutment
at the study site, along with a detailed on-site gamma log showing presence of a
thick claystone layer at 23 feet above the Pittsburgh seam