Study of the Law of Hydraulically Punched Boreholes on Effective Gas Extraction Radius under Different Coal Outputs

Table 1

Borehole design parameters.

Drilling number	Inclination (°)	Azimuth (°)	Meeting coal point (m)	Borehole length (m)	Coal crossing section (m)
1-#	11	270	45.4	55.6	10.2
1-2#	38	270	22.4	27.7	5.3
1-3#	88	90	17.2	24.3	4.1
1-4#	51	90	27.4	33.7	6.3
1-5#	36	90	44.0	53.9	9.9