China's first fully domestically produced 500+m ultra-long fully mechanized mining face intelligent complete equipment set started trial operation

en.Wedoany.com Reported - On October 10, China's first fully domestically produced 500+m ultra-long fully mechanized mining face intelligent complete equipment set commenced ground joint trial operation at the Huadian Xiaojihan Coal Mine in Yulin, Shaanxi, marking that China's intelligent coal mining has officially entered the "500+m level" era.

The Xiaojihan Coal Mine is located in the Yuheng Mining Area of northern Shaanxi and is the first ten-million-ton-level modern coal mine built by China Huadian in Shaanxi. The 500+m ultra-long fully mechanized mining face that commenced ground joint trial operation is equipped with a fully domestically produced intelligent complete equipment set. The mining face has a strike length of 2,700 m and a dip length of 502 m, with the actual installed length of the scraper conveyor reaching 510 m and an average mining height of 2.2 m, which can greatly reduce the engineering volume of gateway driving.

In terms of technological innovation

This equipment set has achieved multiple domestic firsts: First, it adopts a distributed agile fluid supply system, which can realize rapid group following-machine advance of hydraulic supports; Second, it has developed a 1.5 m low-profile, 2360 KW high-power shearer and an ultra-long-distance scraper conveyor, effectively increasing the chain breaking load and solving the problem of high cutting resistance in hard coal seams; Third, it adopts an adaptive hybrid networking of "wired ring network + wireless ring network" to ensure high reliability of ultra-long-distance communication.

In terms of intelligent system construction

A five-layer IoT architecture of "perception layer, network layer, edge computing layer, platform layer, and application layer" has been established. By supplementing data such as gas, dust, and personnel positioning, full-coverage monitoring is achieved; Through real-time collaborative control of the shearer, hydraulic supports, etc., intelligent cutting and automatic following-machine support advance are achieved; By establishing a unified big data platform, storage-analysis-sharing-decision-scheduling of multi-source heterogeneous data is achieved; By establishing a single-hazard/multi-hazard fusion analysis and graded early warning disaster prevention and control module, the integrated application of "fusion analysis-graded early warning-linked control-closed-loop disposal" is achieved.

Increasing safety and improving efficiency is the core goal of ultra-long mining face intelligence. The number of underground workers is greatly reduced compared with traditional modes; The new coal mining paradigm of "ultra-long mining face + gob-side entry retaining" is pioneered, greatly alleviating the pressure of mining-excavation continuity; Gob-side entry retaining mining can recover stagnant coal pillars and improve resource recovery rate.

It is reported that this joint trial operation was hosted by Huadian Coal Industry Group Co., Ltd. and undertaken by Shaanxi Huadian Yuheng Coal and Power Co., Ltd., with joint participation by units including CCTEG Coal Mining Research Institute, Shanghai Chuangli Group, China Coal Zhangjiakou Coal Mining Machinery Co., Ltd., and Zhengzhou Coal Mining Machinery Group. A relevant person in charge of Yuheng Coal and Power stated that taking this joint trial operation as an opportunity, the 500+m ultra-long fully mechanized mining face will be built into a demonstration benchmark for intelligent coal mines, forming replicable and promotable experience, and contributing to promoting the high-end, intelligent, and green transformation of the coal industry.