高温火区赋存下露天开采爆破及边坡稳定性研究  

Study on Blasting and Slope Stability of Open-pit Mining Under High Temperature Fire Occurrence Mode

作　　者：吕兆海[1,2] 赵长红[2] 曹建涛[1] 海学义 王晓军[2] 岳晓军[2] 

机构地区：[1]西安科技大学能源学院,陕西西安710054 [2]神华宁夏煤业集团有限责任公司,宁夏银川750004

出　　处：《煤矿安全》2017年第7期162-165,共4页Safety in Coal Mines

摘　　要：为有效解决高温火区赋存下露天开采爆破及边坡稳定性问题,针对汝箕沟火区分布特点,提出了地表覆盖、钻孔注浆、剥离灭火的综合防灭火方案;采取"三段式"温度监控模式下"宽孔距,双排距"深孔松动微差爆破、PVC管间隔装药工艺,提高了爆破效果;按爆炸应力波理论、爆炸气体准静态理论确定钻孔裂隙圈半径、临界抵抗值、钻孔间距、装药最小埋深;采用霍克诺谟图法确定边坡帮坡角、稳定系数;针对边坡变形滑动,采取打锚索、挂网等增加滑动面摩擦力的抗滑措施,有效保证了边坡稳定性。In order to effectively solve blasting and slope stability of open-pit mining under high temperature fire occurrence mode, we propose comprehensive fire prevention and extinguishing scheme according to the characteristics of fire distribution. The scheme includes surface covering, drilling and grouting, stripping for fire extinguishing. We take ＂wide pitch-row, double row pitch＂loose deep hole millisecond blasting under＂three stages＂temperature monitoring mode, PVC tube interval charging process to improve the blasting effect. According to the theory of explosive stress wave, explosive gas quasi-static theory, we determinate the fracture radius of the drilling, critical resistance value, borehole spacing, minimum charging depth. Using Hawk abas method,we determine slope angle, stability factor. Aiming at the slope deformation and sliding, taking the anti-sliding measures, like anchor cable, hanging nets to increase the friction of sliding surface, the stability of slope will be guaranteed effectively.

关 键 词：露天开采 边坡稳定性 监测 境界优化 爆破参数 

分 类 号：TD824[矿业工程—煤矿开采]