深埋强矿压综采工作面撤架通道预裂卸压技术研究  

Research on pre-cracking and pressure relief technology of the removal channelof the fully mechanized mining face of deep buried strong ore pressure

作　　者：刘发义 代晓亮 赵帅 韩振飞 LIU Fayi;DAI Xiaoliang;ZHAO Shuai;HAN Zhenfei(Jinneng Holding Equipment Manufacturing Group Qinshui Hudi Coal Industry,Jincheng 048000,China;State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]晋能控股装备制造集团沁水胡底煤业,山西晋城048000 [2]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221116

出　　处：《建井技术》2024年第5期39-44,共6页Mine Construction Technology

摘　　要：胡底煤业3号煤层在开采过程中盘区大巷矿压显现明显,胡底煤业为优化爆破切顶施工工艺,提高爆破切顶卸压效果,实现1311(上)采面对应盘区大巷“不变形”的目标,在1311(上)工作面撤架通道实施深孔爆破切顶卸压护巷方案。根据现场地质条件进行了理论计算,并借鉴了周边矿井爆破切顶的实际经验,最后确定1311(上)工作面撤架通道切顶角度为15°,即切顶钻孔施工倾角为75°,倾向煤柱侧15°。确定预裂孔开孔位置为距离撤架通道煤壁1.0 m处,预裂孔装药起始位置位于煤壁以里1.8 m处,终孔位置在煤壁以里7.5 m处。在施工顶板爆破钻孔时,选用直径为65 mm的钻头,钻孔间距在1.8~2.2 m之间。炮孔深度为33 m,确定封孔长度为11 m,装药长度为22 m。方案对周边强矿压矿井以及条件相似矿井爆破预裂切顶卸压有一定参考意义。In the mining process of No.3 coal seam of Hudi Coal Industry,the mine pressure in the main roadway of the panel area is obvious.In order to optimize the construction technology of blasting top cutting,improve the effect of blasting top cutting and pressure relieving,and realize the goal of“no deformation”in the corresponding main roadway of the panel area on the working face of 1311(above),Hudi Coal Industry implements the scheme of deep hole blasting top cutting and pressure relieving on the working face of 1311(above).According to the geological conditions of the site,the theoretical calculation is carried out,and the practical experience of blasting cutting the roof of the surrounding mine is used for reference.Finally,it is determined that the cutting angle of the removal tunnel of 1311(above)working face is 15°,that is,the construction angle of the cutting drilling hole is 75°,and the inclined side of the coal pillar is 15°.It is determined that the opening hole position of the pre-crack is 1.0 m away from the coal wall of the removal tunnel,the starting position of the pre-crack hole charge is 1.8 m away from the coal wall,and the final hole position is 7.5 m away from the coal wall.When the blasting hole of the roof is constructed,a drill bit with a diameter of 65 mm is selected,and the drilling interval is between 1.8 and 2.2 m.The hole depth is 33 m,the sealing length is 11 m,and the charge length is 22 m.The scheme has a certain reference significance for the blasting pre-cracking top cutting and pressure relieving in the surrounding mine with strong ore pressure and the mine with similar conditions.

关 键 词：爆破切顶 风险评估 矿压监测 爆破材料 施工工艺 

分 类 号：TD322.5[矿业工程—矿井建设] TD235.3