煤层深孔控制爆破作用机制研究  

Study on mechanism of deep-hole controlled blasting in coal seam

作　　者：张树川[1,2] 朱飞昊 高魁[1,2] 

机构地区：[1]安徽理工大学能源与安全学院,安徽淮南232001 [2]安徽理工大学煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001

出　　处：《中国安全科学学报》2017年第9期140-145,共6页China Safety Science Journal

基　　金：国家自然科学基金资助(51474009;51674009);国家青年自然科学基金资助(51604010);安徽省自然科学基金资助(1708085QE111)

摘　　要：为有效应用深孔控制爆破技术防治煤与瓦斯突出等事故,首先利用ANSYS/LS-DYNA软件建立有控制孔和无控制孔2种数值模型,进行煤层爆破数值模拟;其次在实验室建立有控制孔和无控制孔2种物理模型,开展爆破模拟试验;然后通过理论分析爆炸应力波入射控制孔的反射规律,揭示深孔控制爆破控制孔的作用机制。数值模拟、爆破模拟试验和理论分析等研究共同表明:增设的控制孔在煤层深孔控制爆破中将入射的压缩应力波反射为拉伸应力波而产生拉伸作用,有明显的控制导向作用和对其他方向裂隙发育的抑制作用。In order to prevent and control coal gas outburst and other gas disaster accidents by using the deep-hole controlled blasting technology,the mechanism of the deep-hole controlled blasting technology was studied by means of numerical analyses,laboratory tests and theoretical analyses. Both blasting with control hole and blasting without control hole were simulated numerically by using 3 D numerical analysis software ANSYS/LS-DYNA and physically. Incidence and reflection of stress wave at control hole were analyzed theoretically. The results show that the control hole reflects the incident compressive stress wave into a tensile stress wave and produces a tensile action,the control effect is obvious and the inhibition effect on the fracture development in other directions is obvious.

关 键 词：深孔控制爆破 控制孔 机制 数值模拟 爆炸应力波 

分 类 号：X936[环境科学与工程—安全科学]