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PROJECT PROFILE

Over the years, China has maintained its position as the world's largest coal producer. The proportion of coal resources in China's primary energy consumption has remained at 60%-70%, playing a pivotal role in China's economic development. At the same time, however, due to heavy disasters and high risks, coal mines have many people in the production process and many dangerous positions, and accidents sometimes occur. This not only makes people often “heart-wrenching” for the safety of coal mine practitioners, but also becomes a short-board that affects the overall public safety and stability of society.

In addition to strict supervision, how to promote the technological revolution of the coal industry, industrial transformation and upgrading, and reduce security risks has always been a question for people to think about. In fact, among the coal mine employees in China, the proportion of dangerous and heavy-duty personnel engaged in coal mining, tunneling, transportation, security control, etc. is more than 60%. It is the most urgent need to carry out the “machine substitution” high-risk industry. To this end, the State Administration of Coal Mine Safety has recently published and published the "Key Catalogue of Coal Mine Robots" (hereinafter referred to as "Catalogue"), focusing on R&D, coal mining, transportation, security control and rescue, and 38 types of coal mine robots. The specific functions of each robot are specified. So, can smart coal mines solve the problem of “mine disaster”? What technical problems remain to be solved?


APPLICATION BACKGROUND



1.Mining conditions diversity and complexity

The propulsion path of coal mining and excavation equipment must rely on precise positioning and navigation. However, underground coal mines are closed spaces and complex electromagnetic environments, making it difficult to locate and navigate.


2.Insufficient energy power

There are three kinds of energy supply for coal mine robots. The power supply is limited by small power, but it is easy to be interfered by underground power grid equipment, and the working distance is limited. High power is used for underground power supply, but the power supply quality and stability are insufficient. The remaining battery supply also exists. Endurance and working time limits.

3.Problems with stability and reliability

Due to the complexity and unpredictability of downhole operations, once the robot fails, it will not only cause huge losses, but also cause accidents. Therefore, the stability and reliability of the robot are very important.


SOLUTION ARCHITECTURE
FUNCTION IS INTRODUCED

In order to study the visual remote intervention unmanned mining technology, from the in-depth analysis of its technical principle, overall scheme and system function, the unmanned production mode of “unmanned operation and patrol” is proposed, which adopts the anthropomorphic method and will Vision and hearing extend to the working surface, freeing workers from dangerous work surface to relatively safe roadway monitoring center or ground, achieving hydraulic support, shearer, scraper conveyor, etc. in the roadway monitoring center or ground. The equipment is remotely controlled to achieve the unmanned mining of the working face; and the hydraulic support control technology, the shearer control technology, the working surface video monitoring technology, the remote centralized control technology and the personnel safety sensing technology are visually remotely intervened. Key technologies for chemical mining.

Through the use of the orbital inspection platform, all the equipments in the “one-button start-stop” working surface of the tracking monitoring center are realized, and the working surface is visualized. In the monitoring center, the remote operation console of the shearer remotely controls the shearer. Control, can realize the remote drum lift, drop, left pull, right pull, acceleration, deceleration, emergency stop and other actions of the shearer, realize the automatic follow-up operation of the hydraulic support full face and remote intervention control function, realize the data in the underground The uploading to the ground monitoring room and the dispatching room can directly see the situation of coal cutting underground.


Economic benefits:
The production staff consists of 11 people (2 coal machine drivers, 5 bracket workers, 2 transporter drivers, 1 electrician, 1 pumping station operator), reduced to 4 people (2 patrol workers, monitoring center operation) 2 workers), saving labor costs of 3.5 million yuan per year.
Social benefits:
1. The coal mining machine is remotely controlled by the slot, and the working surface realizes the operation of “no one or few people”, and the personnel are evacuated to a relatively safe centralized control vehicle.
2. Increased the recovery rate of coal resources in the working face.
3. The localization of the working surface equipment has been realized, and the degree of intelligence has been improved.
4. Reduced the number of staff, reduced the labor intensity of workers, and achieved sustainable development of mines.

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