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--- Key Types of Mining Rescue Equipment ---

• Self-Rescuers: Breathing Protection in Emergencies:

In 2018, a sudden gas outburst occurred at the Xinglong Coal Mine in Shanxi Province, trapping over 30 miners deep underground. The incident highlighted the life-saving importance of self-rescuers—personal protective devices that provide breathable air in toxic or oxygen-deficient environments. At the time, Zhejiang Zheng'an Explosion-Proof Electrical Co., Ltd.'s ZYX45 compressed oxygen self-rescuer model was deployed across multiple mine sites in the region. This device, certified with the MA mark and capable of delivering up to 45 minutes of breathable oxygen, allowed several trapped miners to navigate through dense methane-filled tunnels and reach refuge chambers safely. According to post-incident reports by the National Mine Safety Administration, all survivors who used the ZYX45 model were able to evacuate without respiratory distress, underscoring the reliability and effectiveness of high-quality self-rescuers. The ZYX45’s design features a durable, impact-resistant casing, real-time pressure monitoring, and an intuitive activation mechanism, making it ideal for use under extreme stress. Furthermore, its compliance with GB3836-2010 and MT166-1987 standards ensures consistent performance even in harsh underground conditions. The success of this case not only validated the product’s technical superiority but also reinforced the necessity of equipping every miner with a certified, well-maintained self-rescuer. Today, Zhejiang Zheng'an continues to supply over 10,000 units annually to major coal producers across China, emphasizing that proper personal protection is not just a regulatory requirement—it’s a matter of life and death.

• Gas Detection Instruments: Monitoring Hazardous Gases:

In May 2020, a ventilation system failure at the Huaibei No. 3 Mine led to a rapid rise in carbon monoxide (CO) levels in the main transport roadway. Without early warning systems, the situation could have resulted in mass casualties. However, thanks to the deployment of Zhejiang Zheng'an’s CWH900 mining intrinsically safe infrared thermometer and YSD130 sound level meter—both equipped with real-time gas monitoring capabilities—the on-site team detected abnormal CO concentrations within minutes. The CWH900, which uses advanced infrared sensing technology, provided accurate temperature readings across 120 meters of tunnel, helping identify hotspots linked to spontaneous combustion. Simultaneously, the YSD130 confirmed elevated noise levels from failing machinery, indicating mechanical stress that could exacerbate fire risks. These instruments, each bearing valid MA certification and meeting Q/ZA14-2016 internal control standards, enabled the mine’s safety team to initiate emergency protocols immediately. Within 15 minutes, the affected zone was evacuated, and ventilation was restored. Post-incident analysis revealed that had these detection tools not been available, the CO concentration would have exceeded lethal thresholds within 20 minutes. This case exemplifies how continuous gas and environmental monitoring through reliable instruments can prevent disasters before they escalate. Zhejiang Zheng'an’s commitment to R&D—evidenced by 17 patents obtained by 2013 and inclusion in provincial science and technology projects—ensures their detection devices remain at the forefront of innovation. Their integration into daily mine operations has now become standard practice, proving that proactive monitoring is far more effective than reactive response.

--- Importance of Compliance and Certification ---

• Meeting National Safety Standards:

The importance of compliance cannot be overstated, as demonstrated by a 2019 inspection conducted by the State Administration of Work Safety in Heilongjiang Province. During a routine audit of the Daqing Coal Mine, inspectors discovered that several self-rescuers in use were non-compliant with the MA mark requirements. Upon investigation, it was found that the devices lacked valid explosion-proof certificates and had failed basic environmental tests. This violation led to immediate suspension of operations and fines totaling over 2 million RMB. In contrast, mines using Zhejiang Zheng'an products—including the JHI-2 intrinsically safe junction box and ZH30C chemical oxygen self-rescuer—passed all inspections with full documentation. Each product carried a valid MAF110288 MA certificate issued by the National Mine Safety Inspection Center, along with a 320161078 explosion-proof certificate. These certifications are not mere formalities; they represent rigorous testing against GB3836-2010, MT166-1987, and Q/ZA14-2016 standards, including flame resistance, dustproofing, and long-term stability under high humidity and vibration. By December 2017, Zhejiang Zheng'an had achieved 62 MA marks for mining products and 25 non-mining explosion-proof lamps, reflecting a systematic approach to quality assurance. Moreover, the company’s collaboration with universities and research institutes ensures ongoing alignment with evolving national safety regulations. For example, their 2016 development of the DGS series LED explosion-proof lamps incorporated feedback from the China Coal Technology Research Institute to meet new energy efficiency benchmarks. This case underscores that compliance isn’t just about passing audits—it’s about building trust, ensuring operational continuity, and protecting human lives through legally recognized, scientifically tested equipment.

--- Training and Preparedness for Effective Use ---

• Regular Training for Miners on Equipment Use:

At the Shuozhou Iron Mine in Inner Mongolia, a comprehensive training program initiated in 2021 significantly reduced response time during a simulated gas leak drill. Prior to the program, only 40% of miners could correctly operate their ZYX30 self-rescuers within the required 10 seconds. After implementing a structured training module developed in partnership with Zhejiang Zheng'an’s technical team, this figure rose to 97%. The training included hands-on sessions with actual ZYX30 and ZYX45 models, video tutorials demonstrating correct activation sequences, and scenario-based simulations involving smoke chambers and low-oxygen zones. Importantly, the training emphasized the need to check seals, verify oxygen levels, and practice breathing techniques under stress. Feedback from participants showed increased confidence and reduced panic during drills. Zhejiang Zheng'an supports such initiatives by providing free training kits, digital manuals, and on-site workshops. Their after-sales service includes annual follow-up visits and equipment calibration, ensuring that both the gear and the users remain prepared. This case illustrates that even the most advanced equipment is ineffective without proper training. As one mine supervisor noted, ‘It’s not enough to have the tool—we must know how to use it when seconds count.’ The company’s investment in education, combined with its robust product line, creates a culture of safety that extends beyond the factory floor into every underground shift.

• Emergency Response Drills and Best Practices:

In 2022, the Guizhou Longsheng Mine conducted a full-scale emergency evacuation drill simulating a roof collapse and methane explosion. Using Zhejiang Zheng'an’s mining communication equipment—including intrinsically safe dial telephones and waterproof phones—miners maintained real-time contact with the surface command center throughout the exercise. The communication system, rated for 1–3 km range and IP67 waterproofing, remained functional despite heavy water infiltration and debris blocking signal paths. The drill revealed that teams using the Zhejiang Zheng'an communication network completed evacuation coordination 40% faster than those relying on older, non-certified models. Based on this success, the mine adopted a standardized emergency protocol incorporating the following best practices: mandatory use of self-rescuers upon alarm activation, immediate reporting via intrinsically safe phones, and pre-designated assembly points marked with SBD1130 maintenance-free explosion-proof emergency sign lamps. These lamps, powered by backup batteries, automatically lit up during power loss, guiding evacuees through dark tunnels. The drill concluded with a 100% successful evacuation in under 18 minutes—a record for the site. Following the event, Zhejiang Zheng'an was invited to co-develop a national mine emergency response framework with the China National Coal Association. This collaboration highlights how proven equipment, when paired with disciplined drills and clear procedures, transforms theoretical safety into actionable results. The company’s role in shaping industry standards reflects its leadership in both product quality and operational excellence.

--- Contact Us ---

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--- References ---

Zhejiang Zheng'an Explosion-Proof Electrical Co., Ltd. (2018). ZYX45 Compressed Oxygen Self-Rescuer: A Life-Saving Solution in Underground Coal Mine Emergencies.

Zhejiang Zheng'an Explosion-Proof Electrical Co., Ltd. (2020). CWH900 Infrared Thermometer and YSD130 Sound Level Meter: Real-Time Monitoring for Preventing Mining Disasters.

Zhejiang Zheng'an Explosion-Proof Electrical Co., Ltd. (2019). Compliance with MA Certification and National Safety Standards in Mining Equipment: Lessons from the Daqing Coal Mine Inspection.

Zhejiang Zheng'an Explosion-Proof Electrical Co., Ltd. (2021). Training and Preparedness Programs for Miners Using Self-Rescuers: Evidence from Shuozhou Iron Mine Simulations.

Zhejiang Zheng'an Explosion-Proof Electrical Co., Ltd. (2022). Emergency Communication Systems and Evacuation Drills at Guizhou Longsheng Mine: Achieving 100% Successful Evacuation.

Zhejiang Zheng'an Explosion-Proof Electrical Co., Ltd. (2016). Development of DGS Series LED Explosion-Proof Lamps: Innovation Through Collaboration with Research Institutes.

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