1、英文文献Discussion on key technologyof mine boom type heavy roadheadeAbstract:The paperproposed the key technological issues of the hard rock cutting for themine boom type heavy roadheader. In combined with the research and developmentof the EBZ300TY mine heavy roadheader, the paperdiscussed the technic
2、almeasuresmade. Accordingto the certain geological conditions of the client, the proposed the alternatives on the rationalmatching of theworking parameters, the cut-ter improvementdesign direction, the selected type cutting head, the stabilization and layout of the roadheader, the development of the
3、key parts, the orientation position, the face cross sectionmonitoring and others.Key words:mine heavy roadheader; hard rock cutting; key technologyCantilevered boring machines have made express from 1960s during the 20th century inChina, with continued research, testing and improvement in recent 50
4、years, the performance of machine has increased: cutting power range from 50kW to 220 kW, from light to heavy-duty models of the more than 20 kinds of products, in the coal mine coal and semi-mechanized coal-rock tunnel boring widely used in China in recent years to meet the basic the rapid developm
5、ent of the coal industry needs. Along with the mine working face size and the continuous improvement of production, the modernization of a large number of million-ton mine-building, especially the construction of new wells in the rock to open up the roadway, on whole-rock boring machine demand incre
6、ases every year, its technical capabilities and requirements for continuing raised. The development of cutting power reaches 300 kW, the machine to adapt to the quality of over 100t roadway section 30 50 m2, cutting of rock uniaxial compressive strength reached 120MPa heavy hard rock boring machine,
7、 it is in growing demand and rapid advancement of technology boring machine made under the premise. With the development of the past 50 years compared to the boring machine, it is not a simple local improvement, nor is it a successful model of the past, zoom in or out, boring machine technology but
8、a far-reaching changes in many aspects. This is because some of its key technologies will be applied to other products on the boring machine, boring machine and then bring the whole technology industry. The following boring machine at home and abroad according to the present developments and the dev
9、elopment experience of heavy hard rock boring machine for cutting the key technologies are discussed.Cutting capacity 1 Cutting capacity is heavy hard rock boring machine restricted the use of the most important factor in the development of heavy-duty boring machine at the heart of the level of thei
10、r ability are usually measured by three indicators, namely, tooth loss cut-off rate (to / m3), production capacity (m3 / h) and cutting energy consumption than the (kW h/m3), which cut the rate of tooth loss is more decisive role. Cutting in hard rock boring machine, if the hardness of rock, or grin
11、ding teeth of a strong lead to the actual loss rate cut more than 1 / m3, then they would pick as a result of consumption of high cost and frequent replacement of the cutter and machine vibration increased increase in maintenance costs compared with the drilling and blasting method becomes uneconomi
12、cal. Therefore, heavy boring machines ability to adapt to cutting hard rock cutting is essential, for this body of work needs to choose the parameters, the type of cutting head and cutting tool, such as an in-depth study.1 1 operating parameters of a reasonable match with the performance prediction
13、Cutting in the process, and one of the most important parameter is the most basic cutting thickness (coal cutter rock cutting depth), and the rock cutting nature of the cutting is not suitable thickness will reduce cutting efficiency and Pick of the wear and tear, resulting in more dust. Different c
14、ut-off in the rock structure, the formation of different mechanical properties. Because of the specificity of cutting hard rock, hard rock boring machine during the design, user-specific nature of the geological conditions of rock parameters for the selection and matching of heavy hard rock boring m
15、achine is designed to correct the premise. In the different rock types, such as strength, abrasion, and rock types, such as cutting tests conducted on the basis of the combination of dedicated design software for cutting optimization of operating parameters of the design, hard-rock boring machine is
16、 cutting to achieve high performance the only way . In addition, the design parameters for performance prediction of the success of the use of boring machine is an important factor. According to research institutions abroad, the research results 2, can be forecast according to certain formula for the cut-off rate of tooth loss and to predict cutting capacity. Will be by way of cutting the rock compressive strength, cutting power, boring mach
