坚硬顶板深孔预裂爆破初次放顶技术研究与应用  

Research on Initial Caving Technology by Pre-splitting Blasting in Deep Hole of Hard Roof and Its Application

作　　者：李文峰[1] 张科学[2] 王猛[1] 胡景宝 

机构地区：[1]中国矿业大学矿业工程学院,江苏徐州221008 [2]中国矿业大学(北京)资源与安全工程学院,北京100083 [3]徐州矿务集团有限公司张双楼煤矿,江苏徐州221000

出　　处：《煤炭技术》2015年第6期4-7,共4页Coal Technology

基　　金：国家自然科学基金项目(51204166);江苏省2013年度普通高校研究生科研创新计划项目(CXLX13_952)

摘　　要：采用现场调查、理论分析与现场工程实践等方法,研究了王庄煤矿8101切眼坚硬顶板深孔预裂爆破初次放顶技术。研究指出,坚硬顶板弱化是爆炸应力波和爆生气体共同作用的结果,粉碎区与裂隙区半径是衡量爆破效果的主要标准。通过理论计算,合理确定了炮孔(装药)直径与长度、炮孔间距、装药与封孔结构等主要技术参数。Adopted field investigation, theoretical analysis and industrial test to study initial caving technology of pre-splitting blasting in deep hole which was performed on open-off cut hard roof in8101 working face, Wangzhuang coal mine. The study proposed that hard roof weakening resulted from combined action of stress wave and blasting gas generated by blast, and that the size of crushing area and fissure area was the main standard to measure blasting effect. Through theoretical calculation, the study determined the main technological parameters reasonably, like hole(charge) diameter, hole spacing, hole(charge) length, charge and hole sealing structure.

关 键 词：坚硬顶板 顶板弱化 深孔预裂爆破 初次来压步距 

分 类 号：TD327.2[矿业工程—矿井建设]