高瓦斯综放工作面顶板深孔预裂爆破技术应用  

Application of Deep Borehole Pre-cracking Blasting Technology to Floor of High Gassy Fully Mechanized Top Coal Caving Face

作　　者：张帅[1] 张百胜[1] 张涛[1] 

机构地区：[1]太原理工大学矿业工程学院,山西太原030024

出　　处：《煤炭工程》2014年第4期49-51,共3页Coal Engineering

基　　金：国家科技支撑计划(2007BAK29B02)

摘　　要：余吾煤业S2206高瓦斯综放工作面基本顶岩层厚度大、致密坚硬,初采时易形成大面积悬顶,突然大面积垮落时,易造成工作面矿压显现剧烈、瓦斯骤然升高等问题,基于此,提出对S2206工作面进行初采前顶板弱化,并通过开切眼深孔预裂爆破,预先破坏开切眼顶板的完整性,缩小了顶板初次垮落步距,杜绝了这种顶板大面积来压隐患,同时提前回收了顶煤,实现了S2206工作面安全、高效生产。The main roof above No. S2206 high gassy fully mechanized top coal caving mining face in Yuwu Mining was high in thickness, compact and hard. During the initial mining period, a large area suspended roof could be easily formed. When the large area suspended roof suddenly collapsed, serious mine strata pressure behaviors and gas content suddenly increased problems would be caused in the coal mining face. Based on the circumstances, a roof weakening conducted before the initial mining of No. S2206 coal mining face was proposed. With the deep borehole pre - cracking blasting in the open - off cut of the coal mining face, the integrality of the roof above the open - off cut could broke in advance, a cycle distance of the roof initial falling was reduced and a danger of large roof pressure could eliminated. Thus the top coal could be recovered in advance and a safety and high efficient production of No. S2206 coal mining face was realized.

关 键 词：坚硬顶板 顶板弱化 深孔预裂爆破 

分 类 号：TD823[矿业工程—煤矿开采]