Investigation on the CBM Extraction Techniques in the Broken-Soft and Low-Permeability Coal Seams in Zhaozhuang Coalmine

Table 3

Hydraulic fracturing monitoring results.

Well	Coal seam depth	Fracture shape	Area
CZ-X1	304.54-310.74	Horizontal	Adjacent area
CZ-X2	469.54-475.64	Horizontal	Adjacent area
HD-X1	490.50~496.40	Vertical	Adjacent area
ZZ-X1	594.11~598.53	Vertical	Research area
ZZ-X2	681.10~687.18	Vertical	Research area
ZZ-X03	684.78~689.4	Vertical	Research area