Aiming at the problem of low efficiency of conventional extraction caused by high adsorption, low permeability and difficult to break coal in high gas and hard coal seam, the 3306 working face of Bofang Coal Mine is taken as the research object, and the coal physical property test, mechanical experiment, FLAC3D numerical simulation and field test are combined to study the synergistic anti-reflection mechanism and extraction technology of cutting pressure relief. The numerical simulation reveals the stress evolution law of ' radial pressure relief-tangential stress concentration-crack development '.Improving the unloading rate can significantly improve the pressure relief effect. The field test shows that the technology can increase the permeability of the coal seam by 106.2 times, increase the gas extraction efficiency by 2.1 times, and reduce the residual gas content to a safe value, which provides technical support for gas control in similar coal seams.
郭四龙1，张佳乐2. 坚硬煤层掏槽卸压增透机制及瓦斯抽采技术研究[J]. 煤炭与化工, 2026, 49(2): 131-135.
Guo Silong 1, Zhang Jiale 2. Research on pressure relief and permeability improvement mechanism and gas extraction technology of hard coal seam cutting. CCI, 2026, 49(2): 131-135.
