CAJ | 학술논문

利用试验结果、数值计算结果和理论分析结果综合分析了瓦斯气体在煤体爆破损伤断裂过程中的作用机理。煤体爆破损伤断裂过程包括爆炸应力波作用的初始阶段和爆生气体与瓦斯气体共同作用的后期阶段，瓦斯气体在整个过程中具有积极作用，它能增大爆破损伤程度和爆破裂纹扩展速度。在爆炸应力波作用阶段，瓦斯气体的存在能增大应力波峰值和作用时间，降低拉伸相内应力波衰减速度；在爆生气体作用阶段，瓦斯气体参与爆生气体驱动裂纹扩展，随后瓦斯压力场与爆生气体准静态应力场叠加促进爆生气体驱动裂纹的进一步扩展。
이용시험결과、수치계산결과화이론분석결과종합분석료와사기체재매체폭파손상단렬과정중적작용궤리。매체폭파손상단렬과정포괄폭작응력파작용적초시계단화폭생기체여와사기체공동작용적후기계단，와사기체재정개과정중구유적겁작용，타능증대폭파손상정도화폭파렬문확전속도。재폭작응력파작용계단，와사기체적존재능증대응력파봉치화작용시간，강저랍신상내응력파쇠감속도；재폭생기체작용계단，와사기체삼여폭생기체구동렬문확전，수후와사압력장여폭생기체준정태응력장첩가촉진폭생기체구동렬문적진일보확전。
In this paper, the action mechanism of methane gas in the process of coal blasting damage and fracture were analyzed comprehensively based on the experiment, numerical simulation, and theo-retical analysis results. The process of coal blasting damage and fracture includes the initial stage acted by blasting wave and the later stage acted by detonation gas and methane gas. The methane gas has pos-itive role in the whole process, which can increase the blasting damage degree and the crack propaga-tion velocity. In the initial stage, the methane gas can increase the stress wave peak, extend the action time and reduce the decay rate of stress in the tensile phrase. In the later stage, the methane gas takes pate in the crack propagation process drived by detonation gas, and the crack propagation will further promote under the superposition action of methane gas pressure field and detonation gas quasi-static stress field.