煤矿井下保直钻进技术现状及展望

State and prospect of underground straight drilling technology in coal mines

摘要:

煤矿井下钻孔轨迹偏斜易导致治理盲区的出现，严重威胁煤矿安全高效开采。通过对导致钻孔偏斜的地质因素、技术因素和工艺因素的系统分析，得到了钻孔偏斜的根本原因。对现有保直技术的原理及其适用性进行了分析总结。钻孔保直是影响钻孔施工质量的因素，但目前钻孔保直技术或多或少都存在技术上的问题，不能在煤矿大范围推广使用，故在钻孔保直方面需要不断发展，研发出适用性强、易于现场实施的保直技术。应加强偏斜因素的深层次的研究、钻孔保直机具设备的研发等工作。

Abstract:

The deviation of borehole trajectory leads to the extraction blind zone easily， which seriously threatens the safety and efficient mining of coal mines. Through the analysis of geological， technical and process factors， the root cause of borehole deflection is obtained. This paper analyzes and summarizes the principle and applicability of the existing straight drilling technology. Borehole straightness is a factor that affects the drilling quality. However， the current straight drilling technology has more or less some technical problems and cannot be widely used in coal mines. Therefore， continuous progress should be made on straight drilling so as to develop a kind of straight drilling technology with strong adaptability and easy field application. The in-depth research on deflection factors and the development of straight drilling equipment and tools should be strengthened.