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我机是在58年12月初搬到梨树沟施工。首先在2剖面1号孔就使用了89公厘鑽具做为第一套鑽具,立軸轉速加到260轉/分,压力一般加到35公斤/cm~2左右,結果在6—7級岩石中小时效率达1.633公尺。接着又在2剖面3号孔以实鑽46.3小时,完成了全孔76公尺任务,而在8級岩石中台班最高效率达到12公尺,折合台月效率454.3公尺。为了清楚說明问題,拿8級岩石举例,可以从表1看出110与91鑽具在效率上是有較大出入的。
My machine was moved to Lishugou construction in early December 58. First of all, in section 2 of No. 1 hole, 89 mm drill tool was used as the first set of drilling tools. The vertical axis speed was added to 260 rpm and the pressure was generally increased to 35 kg / cm ~ 2. The result was 6-7 Rock mid-hour efficiency of 1.633 meters. And then in 2 section 3 holes to drill 46.3 hours, completed a full-bore 76 meters mission, and in the 8 rock in the table the highest efficiency of 12 meters, equivalent to 454.3 meters per month efficiency. In order to clearly explain the problem, take the rock for example, you can see from Table 1 110 and 91 drill there is a greater discrepancy in efficiency.