China University of Mining and Technology (CUMT)

Changlong Du

Zhencai Zhu

Songyong Liu

Hongxiang Jiang

Kuidong Gao

Daolong Yang

Wei Li

Yuxing Peng

Gang Shen

Zenghui Liu

Hongsheng Li

Zhengwei Hu

Pei Yang

The present invention discloses a hard rock roadway and tunnel boring machine with actively rotating hobs, including a rack provided with a crawler track unit. The rack is provided with a hydraulic power unit and a high-pressure abrasive jet generation system connected therewith. A transmission box is fixedly arranged at one of ends of the rack. The transmission box is provided with two input shafts and one output shaft. The input shafts are connected with planetary reduction mechanisms. Input ends of the planetary reduction mechanisms are connected with cantilever disc driving motors. A cantilever disc is fixed to the output shaft. Four cantilevers are hinged to the cantilever disc. Cantilever driving motors are further arranged on the cantilever disc. Actively rotating hob devices are arranged at ends of the cantilevers away from the cantilever disc. The transmission box is further provided with rotary sealing devices.

Hard rock roadway and tunnel boring machine with actively rotating hobs

A drilling and bursting heading machine, comprising a drilling and bursting device (), an angle control device, a forward-backward telescopic device and a cantilever type heading machine (), wherein the drilling and bursting device () is mounted on a forward-backward moving component of the forward-backward telescopic device by means of the angle control device, and the forward-backward telescopic device is mounted on the cantilever type heading machine (); the drilling and bursting device () comprises a fixing support (-), as well as a rock drill component and a bursting component fixedly mounted on the fixing support (-) respectively; the angle control device comprises a mounting base (-), an auxiliary rotary hydraulic motor (-), an adjustment hydraulic cylinder (-) and a main rotary hydraulic motor (-); and when the forward-backward moving component of the forward-backward telescopic device completely extends out, the distance from a front end of the drilling and bursting device () to a working plane is shorter than the distance from a front end of a cutting head of the cantilever type heading machine () to the working plane. The drilling and bursting heading machine has a compact structure and is able to implement quick drilling and bursting on a hard rock stratum having a rock hardness f greater than 10 without increasing the energy consumption, so that the heading efficiency is improved and potential safety risks are reduced.

Drilling and bursting heading machine

Growing community of inventors

Jiangsu, China

Changlong Du