en.Wedoany.com Reported - In the first quarter of 2026, China Energy Investment Corporation's Shendong Coal Group successfully overcame the "bottleneck" technical challenges of core shearer components. The left and right haulage box housings for the shearer, which had long relied on imports, have now been localized and are operating stably. During the research and development process for these core components, the team broke through technical barriers related to material strength, sealing performance, and transmission precision. Strict quality control was maintained from casting to heat treatment to ensure the domestically produced haulage box housings met design requirements. At the 43304-2 working face of the Yujialiang Coal Mine, domestic replacements were made for the haulage boxes of the JOY 7LS1A/LWS667 thin-seam shearer. After a 6-hour power-on and water-circulation test, the components functioned normally.

To address the transportation challenges of ultra-long working faces, Shendong Coal introduced the first set of armored face conveyors (AFC) breaking the 2000kW power threshold. Power was increased by 25%, the pan width was widened to 1.1 meters, increasing the transport cross-section by 10%, which thoroughly resolved the coal blockage problem. The stage loader power was also upgraded from 700kW to 1000kW, achieving efficient coordination with the AFC. Following the localization of the shearer's core components, the overall machine's operational stability has significantly improved, providing crucial equipment support for the efficient mining of ultra-long working faces.

The Yujialiang Coal Mine implemented an intelligent sound-light interlock protection system. This system focuses on safety management difficulties in cross-section, high-drop coal chute operations involving overlapping time/space and the inability for real-time coordinated feedback. With a core design philosophy of "upper-lower linkage, dual light-source indication, local control, and clear authority," it upgrades existing mining red-green voice alarm lights to establish a real-time, linked warning and communication system between the upper and lower working areas of coal chutes. The Daliuta Coal Mine built a new intelligent command center where operators can precisely monitor various details of the shearer's core components—such as operating status, speed, and inclination angle—from inside a "space capsule." The shearer possesses a "smart brain," enabling it to automatically adapt to coal seam undulations for precise mining. A relevant person in charge at the China Shendong Coal Equipment Maintenance Center stated: "The comprehensive localization of shearer core components, from key parts to the complete machine, has strongly promoted the development of new quality productive forces in the coal industry."

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