( 3 ) based on the experiments data , it has been found that if the emitter discharge of sdi was little , the depth of pipe buried should be shallow , and the distance between two micro holes should be chosen to equal or close the distance between two lateral pipes , if the emitter discharge of sdi was great , the pipe may be buried deeper , and the distance between two micro holes could be greater than the distance between two lateral pipes 根据一维土柱近似的湿润轮廓线初步选定了工程设计参数。在地下滴灌灌水器出流量较小情况下，埋深应浅，孔距应选择和毛管间距相等或接近；出流量大时，埋深可深，孔距大于毛管间距仍可获得较均匀的土壤水分分布。
The influence of specific charge , hole arrangement , charge structure , stem length , millisecond interval and ignition mode on the yield of the blasted boulder is analyzed some measures to lower boulder yield in deep hole blasting of underground mine are presented through the optimization of blasting operation parameters as follows : lowering deep hole blasting effect of geology structure , rationally determining specific charge , using technique of wide - space small burden blasting , technique of manifold charge structure and technique of millisecond compression blasting , strengthening the management of boring construction and blasting construction 该优化技术措施主要有：减少地质构造对深孔落矿的影响，合理确定炸药单耗的方法，使用大孔距小抵抗线落矿技术，采用多种装药结构技术，采用多排微差起爆技术，加强深孔的施工管理和加强爆破施工的现场管理。
