基于瞬變電磁法卸壓深孔爆破效果研究
發(fā)布時間:2018-08-05 19:32
【摘要】:為了對煤礦巷道圍巖深孔卸壓爆破效果進行驗證,利用瞬變電磁法探測圍巖深孔爆破前后視電阻率的分布,通過爆破前后視電阻率等值線圖,分析深孔爆破破壞區(qū)分布。經(jīng)分析,井下同一探測區(qū)域巖層在深孔卸壓爆破前后巖體視電阻率發(fā)生明顯變化,說明深孔爆破引發(fā)巖體的松動破裂。爆破孔間距為10 m時,卸壓爆破后炮孔間圍巖球形破壞區(qū)相互聯(lián)通和重疊,說明孔間距較為合理,能夠在巖體內(nèi)形成連續(xù)破壞區(qū)。
[Abstract]:In order to verify the effect of deep hole pressure relief blasting on surrounding rock of coal mine roadway, the distribution of apparent resistivity before and after deep hole blasting is detected by transient electromagnetic method, and the distribution of failure zone of deep hole blasting is analyzed by using the contour map of apparent resistivity before and after blasting. According to the analysis, the apparent resistivity of rock mass changed obviously before and after the deep hole pressure relief blasting in the same exploration area, which shows that the rock mass loosening and fracture caused by the deep hole blasting. When the hole spacing is 10 m, the spherical failure zone of surrounding rock is connected and overlapped between the blasting holes after the pressure relief blasting, which indicates that the hole spacing is reasonable and the continuous failure zone can be formed in the rock mass.
【作者單位】: 神華新疆能源有限責任公司生產(chǎn)技術部;山東科技大學;神華新疆能源有限責任公司烏東煤礦;
【基金】:國家自然科學基金(51504145;51574155) 山東科技大學人才引進基金(2014RCJJ035)
【分類號】:P631.325;TD235.46;TD322.5
[Abstract]:In order to verify the effect of deep hole pressure relief blasting on surrounding rock of coal mine roadway, the distribution of apparent resistivity before and after deep hole blasting is detected by transient electromagnetic method, and the distribution of failure zone of deep hole blasting is analyzed by using the contour map of apparent resistivity before and after blasting. According to the analysis, the apparent resistivity of rock mass changed obviously before and after the deep hole pressure relief blasting in the same exploration area, which shows that the rock mass loosening and fracture caused by the deep hole blasting. When the hole spacing is 10 m, the spherical failure zone of surrounding rock is connected and overlapped between the blasting holes after the pressure relief blasting, which indicates that the hole spacing is reasonable and the continuous failure zone can be formed in the rock mass.
【作者單位】: 神華新疆能源有限責任公司生產(chǎn)技術部;山東科技大學;神華新疆能源有限責任公司烏東煤礦;
【基金】:國家自然科學基金(51504145;51574155) 山東科技大學人才引進基金(2014RCJJ035)
【分類號】:P631.325;TD235.46;TD322.5
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