mining of spontaneous combustion deposit

例句：

1. 1.The mine was filled with the hazardous material, which could cause spontaneous combustion.
   矿井里充满了这种危险物质，可能会引起自燃。
2. 2. The research team found that the spontaneous combustion deposit in the area had been significantly reduced.
   研究团队发现该地区的自燃沉积物已经显著减少。
3. 3. The company is working on a new technology to prevent the spontaneous combustion of coal during storage.
   该公司正在研发新技术，以防止煤炭在储存过程中自燃。