露天剥离危岩定向抛掷硐室爆破设计与实践
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摘要
柿竹园多金属矿床塌陷区北部立有一陡峭三棱椎山体,严重威胁露天地下联合开采的安全。基于施工安全性、技术经济合理性,优选大规模定向抛掷硐室爆破方案。采用分区分类爆破、集中药包方形布置、药包耦合装药、主副双起爆体等关键技术确保爆破效果。方案实施后,定向抛掷率达到63%,爆破危害控制在合理范围之内,为多金属矿床露天地下联合开采创造了条件。
An abrupt triangular pyramid mountain,locating at the north of subsidence area in Shizhuyuan polymetallic mine,seriously affects the safety of combined mining of open-pit and underground.Based on construction safety,as well as technical and economic rationality,the massive chamber blasting and directional throwing method was optimally presented.The blasting effect was ensured by key technologies,such as divisional and classified blasting,square layout of centralized packing,coupling charged,as well as main and auxiliary double initiation body.After the implementation of the scheme,the directional throwing rate reached to 63%,and the blasting hazard was controlled within a reasonable range.The research results created conditions for the combined mining of open-pit and underground in polymetallic deposits.
An abrupt triangular pyramid mountain,locating at the north of subsidence area in Shizhuyuan polymetallic mine,seriously affects the safety of combined mining of open-pit and underground.Based on construction safety,as well as technical and economic rationality,the massive chamber blasting and directional throwing method was optimally presented.The blasting effect was ensured by key technologies,such as divisional and classified blasting,square layout of centralized packing,coupling charged,as well as main and auxiliary double initiation body.After the implementation of the scheme,the directional throwing rate reached to 63%,and the blasting hazard was controlled within a reasonable range.The research results created conditions for the combined mining of open-pit and underground in polymetallic deposits.
引文
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[3]马元军,张艳,江小波.复杂环境超深孔抛掷爆破技术[J].工程爆破,2017,23(3):56-59.
[4]胡存虎,王德胜,乔海平.50m厚岩石剥离的深孔抛掷爆破法及爆破振动[J].工程爆破,2017,23(6):68-72.
[5]胡辉,李祥龙,石晨晨,等.爆破振动对临近建筑物安全影响研究.[J]中国钨业,2017,32(5):42-48.
[6]宋日.露天煤矿抛掷爆破缓冲孔爆破优化与效益分析[J].工程爆破,2016,22(3):34-37.
[7]焦永斌,陈绍潘,邓森儒,等.首钢大石河铁矿千吨定向抛掷硐室大爆破[J].工程爆破,2004,10(3):60-64.
[8]郑炳旭,高荫桐,肖文雅,等.定向爆破抛掷距离研究与分析[J].爆破,2006,23(4):1-4.
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