Ultra-High-Pressure Hydraulic Slitting Pressure Relief and Penetration Enhancement Technology and Equipment for Soft Coal Seams

Table 5

Comparison of the amount of work between slotted drilling and comparative drilling.

	Contrast hole	Slotted hole	Contrast value
Drilling arrangement parameters	Row spacing 3 m, normal spacing 4 m	Row spacing 4 m, normal spacing 5 m	46% reduction in drilling work in the same area
Average 100-meter-per-hole extraction scalar volume within 6 months	0.056 m^3/min	0.169 m^3/min	3.02 times
The total amount of gas extraction in the same area has increased	~	~	71.6%
Effective radius of drilling for 6 months of drilling (m)	4.76	2.69	1.76 times