Influence radius of pressure relief of energy-accumulating blasting and water injection in the heading face of the liangbei coal mine

This study aims to reasonably determine the influence radius of pressure relief energy-accumulating blasting and water injection in Liangbei Coal Mine effectively eliminate local stress concentration coal seam outburst risk. The change gas parameters each test hole before after is determined through ANSYS/LSDYNA numerical simulation, theoretical analysis calculation, application parameter method 32051 heading face Mine. technology direction trough studied, which provides reliable data for layout working experimental results are as follows: 1) simulation via shows that a cavity formed by an explosive shock wave borehole. diameter 42 cm, 10 times hole. non-energy-accumulating 14 3.3 2.9 larger than direction. crack length 294 80 cm. 2) Theoretical calculation present crushing area shaped charge 39 fracture 267 vibration 159 3) Comparison field experiment indicates 300 4) with 550 cm borehole spacing demonstrates verification index drilling decreases, analytical values (Δh2) decrease from 120–140 Pa 100–120 Pa, cutting weight (S) decreases 3.2 4.6 kg/m 3.0–3.8 kg/m, released transferred deep coal. has guiding significance elimination arrangement energy-gathering