分析了死亡76人的新华区四矿“9·8”特别重大瓦斯爆炸事故原因:201掘进巷因201机巷顶板垮落造成其局部通风机停风,积聚了大量高浓度瓦斯；违章送风造成瓦斯浓度达到爆炸界限；201掘进巷煤电钻电缆失爆引起瓦斯爆炸；煤尘参与了爆炸.总结了事故教训:该矿通风管理混乱,巷道断面小,煤尘大,风门漏风严重,突出矿井串联通风；该矿采用木支护方式,顶板垮落严重；该矿机电管理混乱,井下电缆多处破皮,电气设备失爆,不按规定维护煤电钻综合保护装置；该矿不执行瓦斯电、风电闭锁的规定；局部通风机无专用电源,无备用通风机；该矿安全监控系统中的传感器数量远远低于有关标准和规程要求,安装地点不当,使用方法不正确；当安全监控系统报警时,不是采取停电、撤人等安全措施,而是将传感器拔脱,躲避监管.最后指出必须从通风、监控、抽采、供电、防爆、防尘、防火、爆破、避险等多方面综合防治瓦斯.%The paper analyzed causes of "9 · 8" especially serious gas explosion disaster at No. 4 Coal Mine of Xinhua District which led to death of 76 people: amount of high-concentration gas accumulated in 201 tunnelling roadway because of roof caving which caused blowing-out of local ventilator of 201 tunnelling roadway; peccant air supply caused gas concentration to explosion limit; cable of coal electric drill of 201 tunnelling roadway lost explosion-proof ability to ignite gas; coal dust participated in explosion. Then it summarized accident lessons: the mine had confused ventilation management, such as small roadway section, thick coal dust, serious air leakage of air door and series ventilation of outburst mine; the mine used wooden support which caused serious roof caving; the mine had confused electromechanical management, such as underground cables had torn shield, electrical equipments lost explosion-proof ability, and maintenance of integrated protectors of coal electric drill did not accord to regulations; the mine did not implement regulations of lock between gas and electricity and between air and electricity; local ventilator had no special power supply and no other ventilator standby; sensors in safety monitoring and control system of the mine were far less than requirements of relevant standards and regulations, and were neither installed in correct sites and nor properly used; when safety monitoring and control system alarmed, the mine took wrong actions with pulling out sensors to avoid supervision other than cutting power and evacuating people. At last, it pointed out that gas control must be done in various aspects of ventilation, monitoring, drainage, power supply, explosion-proof, dustproof, fireproof, blasting and risk avoiding.
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