综放工作面爆破切顶主要参数研究
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摘要
针对恒晋煤矿井下9108综放工作面爆破切顶方案,通过对预裂爆破基础理论和工作面地质条件进行分析,综合确定预裂爆破的主要参数,并采用爆破破碎区半径表达式计算炮孔间距,再进行ANSYS/LS-DYNA数值模拟,从等效应力云图观测波的传播和裂隙发育情况,从压力-时间历程曲线分析裂隙区半径值,得出适用于井下综放工作面顶板预裂爆破的参数,从而提高综放工作面的初采采出率。
According to Hengjin Mine 9108 fully mechanized caving face roof cutting blasting scheme,based on the analysis of the pre-splitting blasting theory and geological condition of the working face,the main parameters of the pre-splitting blasting,blasting and the radius calculation formulas of hole spacing,then the ANSYS/LS-DYNA numerical wave observation should be developed from the equivalent stress nephogram and crack propagation analysis,crack area radius value from the pressure time history curve,it was suitable for underground roof caving blasting parameters,thereby improving the fully mechanized working face at the beginning of the initial mining rate.
According to Hengjin Mine 9108 fully mechanized caving face roof cutting blasting scheme,based on the analysis of the pre-splitting blasting theory and geological condition of the working face,the main parameters of the pre-splitting blasting,blasting and the radius calculation formulas of hole spacing,then the ANSYS/LS-DYNA numerical wave observation should be developed from the equivalent stress nephogram and crack propagation analysis,crack area radius value from the pressure time history curve,it was suitable for underground roof caving blasting parameters,thereby improving the fully mechanized working face at the beginning of the initial mining rate.
引文
[1]牟秀超,张百胜,杨永康,等.坚硬顶板综放面深孔预裂弱化顶板处理技术[J].中国煤炭,2017,43(6):62-66.
[2]饶国庆.隧道下穿既有线爆破方案的研究与实践[J].国防交通工程与技术,2013,11(6):33-35.
[3]沈玉旭.提高综放面初采煤炭采出率的预裂爆破方法及其效果分析[D].太原:太原理工大学,2013.
[4]闫明辉.岩石定向爆破数值模拟及装药优化[D].沈阳:沈阳理工大学,2014.
[2]饶国庆.隧道下穿既有线爆破方案的研究与实践[J].国防交通工程与技术,2013,11(6):33-35.
[3]沈玉旭.提高综放面初采煤炭采出率的预裂爆破方法及其效果分析[D].太原:太原理工大学,2013.
[4]闫明辉.岩石定向爆破数值模拟及装药优化[D].沈阳:沈阳理工大学,2014.