摘要
针对煤层掘进或回采过程中发生的冲击危险,提出了一种新的卸压防冲措施——超高压定点水力压裂技术。理论研究认为,水力压裂防冲是压裂与注水软化煤层、压裂降能、压裂引起应力转移与应力均化共同作用的结果;压裂降能与压裂注水能显著降低煤层破坏时单位时间内释放的能量,从而降低冲击危险程度;注水软化、应力转移与应力均化是一个相对缓慢的过程,实际应用过程中应提前安排施工时间。华丰煤矿现场试验的成功,表明超高压定点水力压裂能起到预防冲击危险的作用。
Aiming at the rock burst in the processing of tunnelling or mining in coal seam,a kind of new pressure for relief scour and anti impact is proposed——extra-high pressure fixed-point hydraulic fracturing. Theoretical studies suggest that,hydraulic fracturing scour is the result of joint action by fracturing and water softening coal seam,fracturing reduces energy,fracturing causes stress transfer and stress averaging. Fracturing reduces energy and injection have a significant change in reducing the energy released per unit time when the coal is destructed so as to reduce the degree of rock burst; water softening,stress transfer and stress averaging is a relatively slow process,the construction time should be arranged in advance in the process of practical application. Successful field trials in Huafeng coal mine shows that the extra-high pressure fixed-point hydraulic fracturing can play the purpose of preventing rock burst.
出处
《现代矿业》
CAS
2015年第3期112-115,共4页
Modern Mining
关键词
水力压裂降能
应力转移
应力均化
冲击地压
Hydraulic fracturing reduce energy
Stress transfer
Stress averaging
Rock burst
