摘要
为了提高长平煤矿4306工作面底抽巷硬岩巷道掘进速度,使之不影响对3号煤层的瓦斯抽采,从而提高3号煤层的采出率,采用钻爆法和结合中深孔理论,依据巷道围岩结构和强度特性,选择能同时完成打眼和装矸工艺的高效CMZY2-120/18钻装机组作为巷道快速掘进设备,因而需区分出巷道围岩种类的爆破难易程度,为此基础设计了巷道爆破方案,运用ANSYS LS-DYNA数值模拟优化设计了爆破参数,施工作业采用多工序平行交叉作业的科学施工组织形式。研究结果表明:长平煤矿成功应用CMZY2-120/18钻装机组,钻眼和装岩速度快、效率高,缩短工序时间,巷道支护效率提高约25%,平均日进尺由原来的3.2 m增加到5.3 m,有效地降低了掘进成本,改善作业环境,严格按正规循环和各工序平行交叉作业,可以提高岩巷掘进效率。
In order to improve excavation speed of hard rock tunnel in the end-located drainage roadway of No.4306 mining:face of Changping Coal Mine,avoid affecting the gas extraction of No.3 coal seam and improving its recovery rate,a tunnel blasting scheme was designed by drilling-blasting method on the basis of medium-deep hole theory,the structural and strength characteristics of the surrounding rock.A set of highly efficient CMZY2-120/18 drilling-loading unit that could perform hole-drilling and gangue-loading at the same time was selected as rapid tunnel excavation equipment.For this scheme,it was necessary to identify blasting difficulty of the surrounding rock category of the tunnel.The blasting parameters were optimized by ANSYS LS-DYNA numerical simulation,and a scientific organization and management mode of construction with multi-process and parallel-cross operation was adopted.The results showed that Changping Coal Mine had successfully used the CMZY2-120/18 Drilling-Loading Unit,and its hole drilling and mucking were fast and highly efficient,thus reducing the working procedure time.Meanwhile,the tunnel supporting efficiency had improved by about 25% and the average daily drilling distance had increased from 3.2m to 5.3m,which largely reduced excavation cost and enhanced the operation environment.Therefore,to strictly follow the normal cycle and parallel-cross operation of each procedure will help improve the efficiency of rock excavation.
作者
李刚
牛磊
李文龙
LI Gang;NIU Lei;LI Wenlong(School of Mining,Liaoning Technical University,Fuxin 123000,China;Shanxi Changping Coal Limited Liability Company,Jincheng 048000,China)
出处
《煤炭科学技术》
CAS
北大核心
2018年第11期13-20,共8页
Coal Science and Technology
基金
国家自然科学基金资助项目(51204086
51774165)
辽宁工程技术大学煤炭资源安全开采与洁净利用工程研究中心资助项目(LNTU15KF06)
关键词
钻爆法
中深孔爆破
快速掘进
钻装机组
drilling-blasting method
medium-deep hole blasting
rapid excavation
drilling-loading unit
