基于瞬变电磁法卸压深孔爆破效果研究
发布时间：2018-08-05 19:32
【摘要】：为了对煤矿巷道围岩深孔卸压爆破效果进行验证,利用瞬变电磁法探测围岩深孔爆破前后视电阻率的分布,通过爆破前后视电阻率等值线图,分析深孔爆破破坏区分布。经分析,井下同一探测区域岩层在深孔卸压爆破前后岩体视电阻率发生明显变化,说明深孔爆破引发岩体的松动破裂。爆破孔间距为10 m时,卸压爆破后炮孔间围岩球形破坏区相互联通和重叠,说明孔间距较为合理,能够在岩体内形成连续破坏区。
[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.
【作者单位】： 神华新疆能源有限责任公司生产技术部;山东科技大学;神华新疆能源有限责任公司乌东煤矿;
【基金】：国家自然科学基金(51504145;51574155) 山东科技大学人才引进基金(2014RCJJ035)
【分类号】：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.
【作者单位】： 神华新疆能源有限责任公司生产技术部;山东科技大学;神华新疆能源有限责任公司乌东煤矿;
【基金】：国家自然科学基金(51504145;51574155) 山东科技大学人才引进基金(2014RCJJ035)
【分类号】：P631.325;TD235.46;TD322.5
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