On May 17, the reporter learned that the EBH315Q horizontal-axis ultra-heavy-duty hard rock roadheader, independently developed by the Taiyuan Research Institute of China Coal Technology & Engineering Group, has recently been successfully applied and has operated stably under extremely complex geological conditions in mining areas in Guizhou and Shandong, with cumulative excavation exceeding 100 kilometers. This has opened a new path for the safe and efficient construction of full-rock roadways in high-gas mines and rockburst-prone mines in China.

A responsible person from the research institute introduced that the mining areas in western Guizhou contain numerous high-gas mines, with deep coal seam burial, complex geological structures, and high rock hardness, which bring many difficulties to gas control and seriously affect mine safety production. In response to objective factors such as construction condition constraints and complex supporting transport conditions, the Taiyuan Research Institute of China Coal Technology & Engineering Group successfully developed the EBH315Q horizontal-axis hard rock roadheader with independent intellectual property rights.

With advantages including the ability to cut hard rock, high cutting efficiency, good stability, and low parts consumption, the equipment has been successfully applied in the Guizhou mining area. The roadheader achieved a maximum monthly advance of 205 meters and a maximum daily advance of 11.4 meters, setting a new record for monthly advance in rock roadways in the mining area, shortening the excavation time for gas drainage and control roadways, and helping the mine operator improve quality and efficiency.

The coal seams in the Luxi mining area of Shandong are deeply buried, and rockburst has become a major factor threatening mine safety production. "In response to multiple problems in this mining area, such as the large anti-rockburst workload in high-level pressure-relief roadways, high rock hardness, long cutting time, and large roadway gradients, our equipment has demonstrated the advantages of flexibility, good stability, and high cutting efficiency," said a responsible person from the research institute. By optimizing construction processes and increasing equipment operating rates, the researchers promoted a steady increase in daily advance levels, setting the highest record in the Luxi mining area of 210 meters of monthly advance and 9.6 meters of daily advance in large-section full-rock roadways, ensuring efficient and continuous operation of the mining and excavation working faces. At present, hard rock excavation has become the main construction method under such working conditions.