王坡煤矿复杂顶板双级双速扩孔技术研究与应用  

Research and application of two-stage and two-speed reaming technology for complex roof in Wangpo Coal Mine

作　　者：赵凯凯 杨冬冬 张亚洲 褚志伟 ZHAO Kaikai;YANG Dongdong;ZHANG Yazhou;CHU Zhiwei(Shanxi Tiandi Wangpo Coal Industry Corporation Ltd.,Jincheng 048021,China;China Coal Technology and Engineering Group Xi’an Research Institute,Xi’an 710077,China)

机构地区：[1]山西天地王坡煤业有限公司,山西晋城048021 [2]中煤科工集团西安研究院有限公司,陕西西安710077

出　　处：《煤矿安全》2022年第8期69-73,共5页Safety in Coal Mines

基　　金：山西天地王坡煤业有限公司科技资助项目(重点006);中煤科工集团西安研究院有限公司科技创新基金资助项目(2018XAYZD01)。

摘　　要：针对王坡煤矿复杂顶板高位大直径定向钻孔成孔难的问题,进行了双级双速扩孔技术研究;分析了复杂顶板大直径定向钻孔扩孔施工存在的技术难点,并针对性开发了基于孔口钻机机械能及孔底冲洗液压力能多动力联合的双级双速扩孔技术,并搭配三棱螺旋钻杆实现机械水力强排渣。煤矿井下实钻试验表明:双级双速扩孔技术装备搭配三棱螺旋钻杆能够在复杂顶板实现孔径120 mm到200 mm一次钻扩成孔,在复杂顶板砂岩层中平均机械效率可达20 m/h左右,大幅降低了常规扩孔施工的工作量,有效避免了局部孔壁坍塌引起憋压、卡钻等情况的出现。Two-stage and two-speed reaming technology was studied to solve the difficulty of pore-forming at high-position and large-diameter directional drilling in Wangpo Coal Mine.This paper analyzed several technical difficulties in construction.A specific two-stage and two-speed hole expansion technology based on the combination of mechanical energy with drilling fluid dynamic potential energy was developed.By matching triangular spiral drill pipes,actual drilling experimental research in coal mine showed that the mentioned technology can achieve once-through drilling for hole diameter from 120 mm to 200 mm,and average mechanical efficiency can be up to 20 m/h in complex sandstone roof.The technical proposed above reduces the workload of conventional hole enlargement construction greatly,avoids the occurrence of pressure holding and stuck drill caused by local hole wall collapse effectively.

关 键 词：复杂顶板 双级双速 扩孔技术 顶板大直径钻孔 扩孔效率 

分 类 号：TD712.6[矿业工程—矿井通风与安全]