Roofbolters with compressed-air rotators

被引：0
|
作者：
Lantsevich, M. A. [1 ]
Repin, A. A. [1 ]
Klishin, V., I [1 ]
Kokoulin, D., I [1 ]
机构：
[1] Russian Acad Sci, Chinakal Inst Min, Siberian Branch, Novosibirsk, Russia
来源：
GEODYNAMICS AND STRESS STATE OF THE EARTH'S INTERIOR (GSSEI 2017) | 2018年 / 134卷
关键词：
D O I：
10.1088/1755-1315/134/1/012036
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
The specifications of the most popular roofbolters of domestic and foreign manufacture currently in operation in coal mines are discussed. Compressed-air roofbolters SAP and SAP2 designed at the Institute of Mining are capable of drilling in hard rocks. The authors describe the compressed-air rotator of SAP2 roofbolter with alternate motion rotors. From the comparative analysis of characteristics of SAP and SAP 2 roofbolters, the combination of high-frequency axial and rotary impacts on a drilling tool in SAP2 ensure efficient drilling in rocks with the strength up to 160 MPa.
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页数：4
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