CAJ | 학술논문

为了研究合理的掏槽方式改善岩巷掏槽效果差、炮眼利用率低的问题，采用水泥砂浆模型对切缝药包楔形掏槽爆破进行了试验研究。共设计了4组对比试验，每组试验分别在6组不同强度的水泥砂浆模型上展开，模型炮孔数目均为6个，每个炮孔装一发8号电雷管起爆。试验结果表明，切缝药包装药结构提高了炮孔利用率、增大了槽腔体积及降低了掏槽碎块的大块率；并得到了不同强度模型最优的掏槽方式，其中80°切缝药包楔形掏槽爆破在不同强度模型下炮孔利用率、槽腔体积及掏槽碎块大块率均相差较小，用于岩性变化较大的岩巷中，可得到较好的掏槽效果。切缝药包楔形掏槽爆破利用切缝对能量的导向作用，实现裂纹的定向扩展，并提高了掏槽效果。
위료연구합리적도조방식개선암항도조효과차、포안이용솔저적문제，채용수니사장모형대절봉약포설형도조폭파진행료시험연구。공설계료4조대비시험，매조시험분별재6조불동강도적수니사장모형상전개，모형포공수목균위6개，매개포공장일발8호전뢰관기폭。시험결과표명，절봉약포장약결구제고료포공이용솔、증대료조강체적급강저료도조쇄괴적대괴솔；병득도료불동강도모형최우적도조방식，기중80°절봉약포설형도조폭파재불동강도모형하포공이용솔、조강체적급도조쇄괴대괴솔균상차교소，용우암성변화교대적암항중，가득도교호적도조효과。절봉약포설형도조폭파이용절봉대능량적도향작용，실현렬문적정향확전，병제고료도조효과。
In order to explore the rational cutting method to improve the poor cutting and the low blasthole utilization in rock tunnel,the experimental study of wedge-shaped cutting blasting with cutting seam cartridge based on cement mortar model is conducted. A total of four sets of comparative tests are designed,and each set of test start on six cement mortar model with different intensity. One model has six blasthole,and each blasthole is charged one No. 8 detonator into it. The results show that the structure of cutting seam cartridge improves the utilization ratio of blast holes,increases the cutting cavity volume and re-duces the boulder yield of cutting rock fragment. The optimal cutting method for different intensity model is obtained,among, the 80° wedge-shaped cutting blasting with cutting seam cartridge has small change in different intensity of model on blasthole utilization,cutting cavity volume and the rate of chunks of cutting rock fragment. A good cutting effect can be obtained when it is used into rock tunnel with large lithology changing. The wedge-shaped cutting blasting with cutting seam cartridge can guide the direction of energy,and achieve crack growth directionally and improves cutting effect of cutting seam.