After several years to jumbolter research,the hard rocks always present in the soft ones in the wall rock procedure using jumbolter,which results in changing the boring tool during the procedure.
经
几年对锚杆
跟踪研究,发现锚杆在围岩作业中
遇到软岩中有硬岩夹层现象,造成施
经更换具问题。
,锚杆(孔和安装用)After several years to jumbolter research,the hard rocks always present in the soft ones in the wall rock procedure using jumbolter,which results in changing the boring tool during the procedure.
经几年对锚杆跟踪研究,发现锚杆在围岩作业中遇到软岩中有硬岩夹层现象,造成施经更换具问题。
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