某煤矿主巷道应力集中规律及冲击灾害研究
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摘要
为了研究煤矿地下巷道的应力重分布规律、围岩变形及破坏特征,进而探讨冲击灾害发生规律。通过现场地应力测量、室内岩石力学实验、数值计算等方法,对矿区巷道内3个测点处冲击灾害的基本类型和潜在规律进行了模拟研究,得知测点2所在的巷道具有显著的岩爆倾向,而测点3所在的巷道冲击地压发生的可能性最大。现场调查得知,计算结果与实际情况吻合。研究表明,现场精确测量与室内岩石力学试验相结合,能客观准确地反映现场实际情况,可为巷道冲击灾害的预测和防治提供可靠的一手资料。
In order to research the re-distribution of in-situ stress,deformation of surrounding rock,failure characteristics of roadway and explore the law of impacting disasters in a coal mine in Shanxi Province,field stress measurement,rock mechanics experiment and numerical calculation had been done.Based on simulation of types and laws of impacting disasters in roadway,we draw the conclusion that there are significant rockburst tendency in surrounding area of the measure point 2,and pressure bump incollieries is obvious in surrounding area of point 3.Investigation shows that calculation results coincide with site situation.Combined field accurate measurement with interior rock mechanics test,can objective and accurate reflects the actual situation in scene,and can provide reliable first-hand information for prediction and prevention of roadway impacting disasters.
In order to research the re-distribution of in-situ stress,deformation of surrounding rock,failure characteristics of roadway and explore the law of impacting disasters in a coal mine in Shanxi Province,field stress measurement,rock mechanics experiment and numerical calculation had been done.Based on simulation of types and laws of impacting disasters in roadway,we draw the conclusion that there are significant rockburst tendency in surrounding area of the measure point 2,and pressure bump incollieries is obvious in surrounding area of point 3.Investigation shows that calculation results coincide with site situation.Combined field accurate measurement with interior rock mechanics test,can objective and accurate reflects the actual situation in scene,and can provide reliable first-hand information for prediction and prevention of roadway impacting disasters.
引文
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[2]Lieurance,R.S.,Stress in foundation at boulder dam.Tech[J].Memo.,346,Bur.Reclamation Denver,Colo.,12,1933.
[3]杨建武.短壁综采在大同矿区的应用及发展前景[J].同煤科技,2005,35(3):3-5.
[4]蔡美峰.地应力测量原理和技术[M].北京:科学出版社,2000.
[5]蔡美峰,乔兰,李长洪,等.矿山地应力场测量及其在新城金矿采矿设计中的应用[M].北京:地震出版社,1996.
[6]梅松华,李文秀,盛谦.FLAC在岩土工程参数反演中的应用[J].矿冶工程,2000,20(4):23-26.
[7]雷松林,郑永来.有限差分程序FLAC基本原理及其在工程中的应用[J].东北水利水电,2007,25(8):4-6,71.
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