CAJ | 학술논문

为了准确获得地下水平浅孔条件下的预裂爆破参数，优化爆破效果，以新城金矿V＃矿体二步采场为工程背景，应用理论分析和现场试验方法，开展预裂爆破参数优化研究。分析了预裂爆破技术的特点及其成缝机理，采用爆炸应力波与高压气体联合作用原理建立预裂爆破初始裂纹起裂、扩展和止裂的判据，并由此推导出用于地下水平浅孔条件下的预裂爆破主要参数的计算公式。根据该计算公式确定的试验采场预裂爆破参数进行现场工业试验，爆破后采场的顶板和两帮平整光滑，预裂炮孔孔壁清晰可见，验证了该计算公式的正确性，同时表明二步采场的回采过程中，采用预裂爆破的效果明显优于光面爆破，是一种安全、高效、经济的爆破落矿工艺，能够满足矿山的安全、高效开采。
위료준학획득지하수평천공조건하적예렬폭파삼수，우화폭파효과，이신성금광V＃광체이보채장위공정배경，응용이론분석화현장시험방법，개전예렬폭파삼수우화연구。분석료예렬폭파기술적특점급기성봉궤리，채용폭작응력파여고압기체연합작용원리건립예렬폭파초시렬문기렬、확전화지렬적판거，병유차추도출용우지하수평천공조건하적예렬폭파주요삼수적계산공식。근거해계산공식학정적시험채장예렬폭파삼수진행현장공업시험，폭파후채장적정판화량방평정광활，예렬포공공벽청석가견，험증료해계산공식적정학성，동시표명이보채장적회채과정중，채용예렬폭파적효과명현우우광면폭파，시일충안전、고효、경제적폭파락광공예，능구만족광산적안전、고효개채。
Combining the application of theoretical analysis and field-test methods ,a parameter optimization study was carried out based on V#orebody of Xincheng Gold Mine to obtain the parameters of pre-splitting blasting accurate-ly in the condition of underground level short hole and to optimize the blasting effect .The paper analyzed the charac-teristics and cracking mechanism of pre-splitting blasting , established the criteria of pre-splitting blasting 's start-crack,propagation and stop-crack by the theory of cooperation of explosive stress wave and high pressure gas ,and de-rived the formula which can be used for the calculation of pre-splitting blasting parameters in the condition of under-ground level short hole .An industrial field test could be implemented with its parameters determined by this formula . The results show that the post-blasting roof and sides are smooth ,and the blast hole is clearly visible ,proving the for-mula correct .The effect by using pre-splitting blasting is significantly better than smooth blasting .Pre-splitting blasting is a kind of safe,efficient and economical process for ore blasting ,which can meet the requirements of safe and effi-cient exploitation .