基于激光巷道断面检测仪的巷道非对称大变形特征分析

发布时间：2018-06-22 01:32

本文选题：激光巷道断面检测仪 + 半煤岩　；参考：《煤矿安全》2017年12期

【摘要】：不同时期巷道全断面尺寸检测能够揭示巷道围岩变形特征及演化规律,为巷道支护设计和围岩控制提供依据。但对于非对称大变形巷道,传统的人工测量方法难以准确表征巷道变形特征。以某矿141511回风巷为工程背景,采用YJDM3.6矿用激光巷道断面检测仪对回采阶段不同位置断面进行了检测。结果表明:回采过程中,3 m宽窄煤柱沿空掘巷段和25 m宽大煤柱掘进段巷道断面均呈现非对称大变形特征,断面收缩率达65%~69%;随着回采工作面的推进,离工作面越近,141511回风巷非对称大变形趋势越发明显,且窄煤柱帮变形量明显大于实体煤帮变形量,巷道围岩控制应重视窄煤柱帮支护;YJDM3.6矿用激光巷道断面检测仪对非对称大变形巷道变形量快速检测及特征分析具有良好的适应性。
[Abstract]:The full section size measurement of roadway in different periods can reveal the deformation characteristics and evolution law of roadway surrounding rock and provide the basis for roadway support design and surrounding rock control. However, the traditional manual measurement method is difficult to accurately characterize the deformation characteristics of asymmetric large deformation roadway. Based on the engineering background of 141511 return air roadway of a certain mine, YJDM3.6 laser roadway section detector was used to detect different positions of sections in mining stage. The results show that the section of roadway with 3 m wide and narrow coal pillar along the goaf and the section of 25 m large coal pillar in the mining process show asymmetric large deformation, and the section shrinkage rate reaches 650.69%, and with the advance of the mining face, The more close to the working face, the more obvious the trend of asymmetric large deformation in the return air roadway is more obvious, and the deformation of narrow coal pillar is obviously larger than that of solid coal. In the control of surrounding rock of roadway, attention should be paid to the application of YJDM3.6 laser roadway section detector for narrow coal pillar support, which has good adaptability to the rapid detection and characteristic analysis of the deformation of unsymmetrical and large deformation roadway.
【作者单位】：中国矿业大学(北京)资源与安全工程学院;贵州大学矿业学院;贵州省非金属矿产资源综合利用重点实验室;贵州省复杂地质矿山开采安全技术工程中心;
【基金】：贵州省科技厅联合资金资助项目(黔科合LH字[2016]7464号、黔科合LH字[2015]7662号) 国家重点基础研究发展计划(973计划)资助项目(2013CB227903) 贵州大学青年教师科研基金资助项目(贵大自青基合字(2013)09号)
【分类号】：TD326

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