煤矿充填投料孔扩孔修复技术研究与现场应用

Research and field application of enlarging and shaping technology for coal mine backfilling feeding holes

摘要:

煤矿充填投料孔是将开采煤炭资源过程中伴生的煤矸石固体废弃物输送到井下采空区进行回填的重要咽喉工程，投料孔使用频率高，输送工作量大，充填材料在输送中冲刷、磨蚀孔壁，导致投料孔发生变形甚至出现破损，严重影响投料孔工作效率，需要对投料孔进行处理。本文以北徐楼煤矿充填投料孔修复处理为例，在原投料孔的基础上进行扩孔修复，下入套管，固井形成新投料孔，实现了快速处理变形、破损投料孔的目的，减少了工作量，缩短投料孔停用周期，保证了煤矿企业正常生产。

Abstract:

The filling material feeding hole in coal mines is a crucial passage for re-transporting the solid waste such as coal gangue produced during underground coal mining back to the underground mined-out areas for filling. Due to its high usage frequency and large transportation volume， the filling materials impact， erode and wear the hole walls during transportation， causing deformation or even damage to the feeding holes， which seriously affects their working efficiency. In response to this situation， it is necessary to handle the feeding holes. Taking the repair and treatment of the filling material feeding holes in Beixulou Coal Mine as an example， this paper expands and shapes the original feeding holes， inserts casing pipes， and solidifies the cement to form new feeding holes， achieving the goal of quickly handling the deformed and damaged feeding holes， reducing the workload， shortening the downtime of the feeding holes， and ensuring the normal production of coal mining enterprises.