Zhang Liang, male, born in August 1984, is a mine ventilation worker in the ventilation area of the Dashe Mine of Jizhong Energy Fengfeng Group. He has won the titles of outstanding contribution technician of Hebei Province, skill master of the coal industry, etc. The operating method of "drawing ventilation system diagram quickly without reference" is innovatively summarized, which is the patron saint of mine safety.

Over the years, with solid theoretical knowledge and rich practical experience, he has led the technical team to play a positive role in the reconstruction design of the mine excavation ventilation system, mine fire prevention, mine air leakage blocking, "one ventilation and three prevention" scientific and technological research of the Dashe Mine. He has successively won more than 40 titles such as "Great Craftsman - Energy Chemistry Geology", "Coal Industry Skill Master", "Hebei Province Outstanding Contribution Technician", etc. As the leader of the "Innovation Studio", he actively organized technological innovation activities. Starting from the source, he organized the technical research team of his unit to solve the bottleneck problems caused by constraints, and formed more than 100 technological innovation achievements, 9 of which were granted national patent certificates. The operating method of "drawing ventilation system diagram quickly without reference" was innovated and summarized, which increased the safety factor of mine ventilation system by 31%. The innovative and developed scraper conveyor wall outburst prevention device and belt conveyor wall outburst prevention device have been put into use, which has increased the mine outburst prevention capacity by 35%. In terms of ventilation monitoring, the innovative research and development of intrinsically safe 3-row 12 post junction box has improved the ability of safety monitoring equipment to transmit data signals in real time and accurately by 43%, creating an accumulated economic value of more than 70 million yuan.