急倾斜特厚煤层综放面超前预裂爆破顶煤弱化技术  

Study on Top Coal Weakening Technology of Pre-blasting at Sub-level Caving Mining of Steep and Extremely Thick Coal Seam

作　　者：吴吉辉 谢小平[2] 

机构地区：[1]神华新疆能源有限责任公司碱沟煤矿,乌鲁木齐830085 [2]中国矿业大学深部煤炭资源开采教育部重点实验室,江苏徐州221116

出　　处：《煤炭技术》2014年第4期135-138,共4页Coal Technology

摘　　要：针对神华新疆能源有限责任公司碱沟煤矿急倾斜特厚煤层综放工作面顶煤弱化的问题,运用理论分析和现场实测相结合的方法,分析了超前预裂爆破技术的基本原理,介绍了+564mB3+6工作面设备和采煤工艺。根据现场+564mB3+6工作面的实际情况,提出了采用超前预裂爆破顶煤弱化技术,确定了超前预裂爆破的技术参数。现场试验结果表明,采用超前预裂爆破顶煤弱化技术效果显著,顶煤变形明显,裂隙发育广泛,达到降低顶煤力学强度和断裂韧性的效果,大大提高顶煤的放出率,从而有利于急倾斜特厚煤层综放面的安全高效回采。Based on the problem of top-coal weakening of sub-level caving mining of steep and extremely thick coal seam of Shenhua Xinjiang energy Co.,Ltd.,Jiangou coal mine,the basic principle of pre-blasting and the equipment and mining technology of no.＋564mB3＋6 working-face was analyzed by adopted the method of combining the theory analysis and the test of practice.Departures from the practice of the number ＋564mB3＋6 working-face,then the technology of top coal weakening technology of pre-blasting was introduced,and the parameters of this technology was established.The results of industrial test showed that the effect is obvious about the technology of top coal weakening technology of pre-blasting,obvious top-coal deformation and fracture widely,which reduce the effect of mechanical strength and fracture toughness of top-coal,greatly improve the release rate of top-coal,which is benefit to the safe and high-efficient mining of steep and extremely thick coal seam.

关 键 词：急倾斜 特厚煤层 综放开采 超前预裂爆破 顶煤弱化 

分 类 号：TD823[矿业工程—煤矿开采]