煤体卸压爆破参数正交试验优化设计研究  

Research on parameters optimization of stress relief blasting in coal roadway using orthogonal experiment

作　　者：刘志刚[1] 曹安业[1] 井广成 LIU Zhigang;CAO Anye;JING Guangcheng(Key Laboratory of Deep Coal Resource Mining,Ministry of Education,School of Mines,China University of Mining ＆ Technology,Xuzhou,Jiangsu 221116,China;China Tower Zhejiang Province Shaoxing Branch,Shaoxing,Zhejiang 312000,China)

机构地区：[1]中国矿业大学深部煤炭资源开采教育部重点实验室矿业工程学院,江苏徐州221116 [2]中国铁塔股份有限公司绍兴市分公司,浙江绍兴312000

出　　处：《采矿与安全工程学报》2018年第5期931-939,共9页Journal of Mining & Safety Engineering

基　　金：国家重点研发计划项目(2016YFC0801406);江苏省基础研究计划(自然科学基金)面上项目(BK20171191);国家自然科学基金项目(51674253;51734009);江苏省研究生科研与实践创新计划项目(KYCX18_1965)

摘　　要：为研究巷道帮部深孔爆破的卸压效果,运用数值模拟方法开展巷道帮部深孔爆破L18(36)正交试验研究。以巷道帮部围岩应力转移、巷道近场应力和巷帮变形为主要考察指标,综合考虑煤体的物理力学性质、装药结构、装药量、爆破孔直径、爆破孔深度和爆破孔间距6项爆破效果影响因素。试验结果表明:煤体的物理力学性质对于爆破效果起到主控因素,其次为装药量与爆破孔直径;通过正交试验和二次完全试验得到影响因素最优组合"3~#煤、8 kg装药量、90 mm孔径、15 m孔深、3 m孔间距、不耦合系数4",对该组合开展的模拟分析发现卸压效果明显,应力降低幅度最大约为34.2%。研究初步结论为煤巷帮部卸压提供了理论依据,对现场工程实践具有一定指导意义。To study the stress relief effects of deep-hole blasting in roadway ribs, numerical simulations based on orthogonal experiment method is applied in this paper. The main inspected indexes, such as stress transfer of surrounding rock in roadway ribs, stress near field region and deformation of roadway, are selected and analyzed. Six factors of blasting effect, namely physical and mechanical properties of coal, charge structure, charge quantity, diameter, depth and distance of the blast-hole are considered. Results show that physical-mechanical properties of coal play a key controlling role on blasting effect, followed by charge and diameter of the blast-hole. By the orthogonal experiment and complete planning, the optimal combination of influencing factors is obtained, which is the plan of ＂3~# coal, 8 kg charge, 90 mm hole diameter, 15 m hole depth, 3 m distance between holes, non-coupling coefficient K=4＂. Based on the optimal combination, the maximum reduction range is 34.2% approximately. The field practice observation of the combination shows remarkable stress relief effects in engineering applications. Research results could also provide theoretical basis and practical significances for deep-hole blasting in roadway ribs.

关 键 词：爆破卸压 数值模拟 正交试验 参数优化 效果验证 

分 类 号：TD235[矿业工程—矿井建设]