Home > News

Environmental factors that affect the performance of roadheader

Jun. 28 , 2019

Environmental factors that affect the performance of roadheader

The performance of China rock tunneling boring machine is affected by environmental factors, the following rock tunnel boring machine supplier share for us.

1. Rock dip Angle. For a tunneling machine, the cutting speed is 8m3/h when there is no rock dip Angle, and 10m3/h when there is rock dip Angle.

2. Tunnel inclination Angle. The tunnel with a certain inclination Angle can make good use of the gravity effect of coal and be easily loaded after cutting. At the same time, it can avoid the cycle retention of coal on cutting head and working surface, thus enhancing the working efficiency and reliability of roadheader.

EBZ260A Rock Tunneling Boring Machine

3. Rock mass strength. The magnitude of rock mass strength has obvious influence on the working efficiency of roadheader. The greater the strength of the rock mass, the greater the energy required to cut the rock per unit volume, and the lower the working efficiency of the roadheader. It is reported in the literature that when the rock mass strength is 21mpa, the energy required to cut the rock per unit volume is 11.2mj/m3, and the working rate of the roadheader is 25m3/h. When the rock strength is 45mpa, the energy required to cut the rock per unit volume is 16.3mj/m3, and the working rate of the roadheader is 20m3/h.

4. Rock injection. Wet rock and dry rock have great influence on the working performance of roadheader. Through comparative analysis, the working efficiency of the tunneling machine of 11 litres of water injected per minute is 50m3/h and that of the dry rock is 25m3/h when the rock strength is the same. Thus it can be seen that the moisture in rock strata does have a great impact on the efficiency of roadheader. But its mechanism research is still in the blank stage. In addition to the above factors, there are many geological environmental factors that affect the performance of roadheader.


Copyright © He Bei Zhong Xuan Construction Machinery Co., Ltd. All Rights Reserved | Sitemap |Powered by

WeChat

WhatsApp

Skype

E-mail

WeChat