深孔控制卸压爆破及其防突作用机理的实验研究

The Research on Outburst Preventive Mechanism of Controlling Stress Relaxation Blast in Deep Borehold of Coal Tunnel

本文应用相似理论．爆破力学．岩体力学等知识．探讨了深孔控制卸压爆破及其防突作用机理，并进行了实验室的模拟试验：得出了爆破后煤体周围应力分布状态及其孔洞分布形式，研究工作表明：深孔控制卸任爆破能够防止煤和瓦斯突出的主要原因在于采取措施后能够形成较大范围的卸压区，卸压区的形成是防灾措施有效性的必要条件。

n the basis of similar theory, blasting mechanics and rock mechanics, this paper discusses the blast controlled stress relaxation in deep borehold and its mechanism of prevention of ortboratory, At the same time, it has been carried out in laboratory. At the same time,it has been gotten that the stress-distribution state around coal body and the formation of hole shapes through its experiment The research work shows that the main cause which can prevent the occurence of outburst in the blast cortrolled stress-relaxation of deep-borehole is ghat a large range of stress-relaxation area is formed after this measure has been taken. The formation of stress-relaxation. area is the necessary condition for the effectiveness of preventive outburst measures.