School of Mechanics and Civil Engineering, China University of Mining and Technology ( Bejing) State Key Lab of
Deep Geomechanics and Underground Engineering

在神东补连塔煤矿斜井TBM掘进段不同埋深围岩进行了岩石成分分析和磨蚀性试验,采用线激光超高速轮廓扫描仪对磨蚀性试验的岩石划痕进行三维扫描分析,并基于磨蚀性试验结果,分析了岩石磨蚀指数CAI与TBM刀具磨损的关系。结果发现:CAI与等效石英含量相关性最强,等效石英含量越大,CAI越大,划痕深度变小,成层状细砂岩的裂纹延伸扩展最明显;钢针划过粉砂岩、中砂岩、细砂岩展现3种不同破坏方式,分别为细颗粒磨蚀、粗颗粒磨蚀、倾斜磨蚀;刀具磨损与岩石CAI值呈一定相关性,CAI值越大,钢针磨蚀越大,刀具磨损也越大,刀具磨损与钢针划过岩石的磨损破坏形式具有一致性。实际工程中可根据钢针磨损形式预测刀具磨损,改进刀刃形式,减少刀具消耗,带来经济效益。

The rock composition analysis and the abrasion test was conducted on the rock from different depth surrounding rock at the heading section of TBM in a mine inclined shaft of a mine in Shendong Bulianta Mining Area, a line laser ultra-high speed profile scanner was applied to a 3 D scanning analysis on the rock scratch es of the abrasion test. Based on the results of the abrasion test, the paper had an analysis on the cutter wear relationship between the Rock abrasion coefficient CAI a nd TBM. The results showed that CAI had a strongest correlation with the equivalent quartz content. The higher equivalent quartz content, the higher CAI would be and the shallow scratch depth would be. The crack extension and development of the bedded fine sandstone was obvious. When the steel needle scratched over on the silts tone, medium sandstone and fine sandstone, there were three different failure modes and there were a fine particle abrasion, coarse particle abrasion and inclined abra sion individually. The cutter wear would have a certain correlation to the rock CAI value. The higher CAI value, the higher steel needle abrasion would be and the higher cutter wear would be. The cuter abrasion would have a consistency in the rock abrasion failure mode by the scratching of the steel needle. In the actual engineering, th e abrasion mode of the steel needle could be applied to predict the cutter abrasion, to improve the cutting edge mode, to reduce the cutter consumption and to have the economic benefit.

国家自然科学基金资助项目(U1261212,41472259,51608521)；国家重点研发计划重点专项资助项目(2016YFC0802505)；