# Design and Application of Simulating Cutting Experiment System for Drum Shearer
## 1 Introduction  
In recent years, China has made remarkable progress in researching and developing coal-mining equipment and fully mechanized mining technology. It has extensively advanced the coal industry in the direction of intelligence and fluidization [1; 2]. As one of the vital equipment of fully mechanized mining face, the shearer has realized the efficient and intensive coal-mining operation, which has reduced the incidence of coal mine safety accidents and improved the working environment of coal miners [3; 4; 5]. The success of the intelligent control of the shearer determines the possibility of automatic operation of the fully mechanized mining face, to a certain extent. For this, coal and rock recognition technology has received extensive research and attention [6]. Most of the existing coal and rock identification technologies use the working condition signals generated when the shearer cuts different coal and rock media for identification and determination. Therefore, when conducting relevant experimental research, the similarity and reliability of the shearer cutting experimental system must meet certain requirements to generate meaningful results.  
Researchers' methods to carry out experimental research on coal and rock identification mainly include (1) Field experiments. By arranging sensors and other measuringdevices on the coal-mining face, they could collect the working condition signals of the coal and rock for analysis and judgment [7]. (2) Ground experiment. Use a real coal-mining machine to conduct actual coal and rock cutting experiments on the ground and obtain various performance data [8]. (3) Single drum cutting experiment. Scholars designed and manufactured a single cutting drum to simulate the cutting experiments of coal and rock [9].  
Signal acquisition on the coal-mining face can ensure the authenticity of signal acquisition, but it faces high-risk and harsh working environment constraints. At the same time, the signal acquisition device also needs to meet explosion-proof requirements, and the experimental risk is relatively high. A ground experiment requires supporting coal-mining machines, actual coal, rock medium, and related equipment, and the test cost is relatively high. The single drum cutting experiment is a cost-effective simulation experiment method. However, the system's reliability needs to be discussed.  
The geomechanics model experiment can analyze and explore the multi-source information generated in the coal-mining process and is an effective method for studying coal and rock identification. To accurately simulate the working state of the shearer during cutting, the experimental device and simulation material established by using similarity theory need to be like the prototype. At present, there is still a lack of complete and systematic research on coal and rock identification experiments. Thus, based on the existing research and the similarity theory, this paper describes the design and constructing a simulation cutting experimental system of drum shearer to acquire performance data to meet this gap. At the same time, combined with the orthogonal experiment method, the influence of the different material ratio schemes on the performance of simulated cutting material was studied. Finally, some cutting experiments are summarized.