摘要
煤与瓦斯突出动力灾害是地应力和瓦斯压力等因素共同作用的结果,采用数值模拟和实验研究相结合的方法,研究煤与瓦斯突出动力灾害的多场耦合监测预警机制,实现动力灾害多场耦合监测预警。通过突出煤岩破裂过程的测试和数值模拟,获得实验室条件下突出煤层的临界应力和瓦斯压力。结果表明:当煤体中部破裂时,剪应力约为13 MPa,模拟再现了地应力和瓦斯压力耦合作用下煤岩裂隙发育及破坏并诱发突出的过程。实验条件下瓦斯压力达到2 MPa、围压3 MPa时,发生突出的轴向力临界值在110~150 k N。模拟结果与实验室测试的结果相符。该研究为煤与瓦斯突出在线监测预警系统研发提供了参考。
The dynamic disaster of coal and gas outburst is the result of the interaction of earth stress and gas pressure. The study building on numerical simulation and experimental research investigates the mechanism behind the multi field coupling monitoring and warning for dynamic disaster of coal and gas outburst, and provides multi field coupling monitoring and warning of dynamic disaster. The work identi- fies the critical stress and gas pressure of the outburst coal seam under laboratory conditions using numeri- cal simulation experiment of outburst coal fracture process and self-developed DDTS-500 multi field cou- pling dynamic disaster test system. The results show that the shear stress is about 13 MPa when the mid- dle part of coal is broken ; the numerical simulation results reproduces the process of development and de- strnction of coal and rock fractures under the combined action of crustal stress and gas pressure; under test conditions, the gas pressure reaches 2 MPa, the confining pressure is 3 MPa, and the critical value of the axial force occurs at 110 - 150 kN. The simulation results are in better agreement with laboratory test results, and the study could provide a reference for the research and development of on-line monito- ring and warning system for coal and gas outburst.
出处
《黑龙江科技大学学报》
CAS
2017年第4期345-349,共5页
Journal of Heilongjiang University of Science And Technology
基金
国家自然科学基金项目(51474099)
关键词
煤与瓦斯突出
监测预警
多场耦合
数值模拟
coal and gas outburst
monitoring and early warning
multi field coupling
numerical simu-lation
