内蒙古西部乌达矿区煤层自燃的控制因素

煤层自燃是一个复杂的物理、化学和环境作用过程,是多种内在原因和外在条件综合作用的结果.本文分析了内蒙古乌达矿区煤层自然发火的内在原因和外在条件,揭示了煤层自燃的各种控制因素.影响煤层自燃的内在原因包括煤层厚度、变质程度、灰分含量、发热量、硫含量和有机显微组分含量等;外在条件包括地质构造、气候、水文地质、地形地貌、煤层的赋存状况、大矿和小煤窑的开采情况等.最后探讨了对不同成因的煤层自燃采取不同的预防和治理方法,为今后煤火的研究和治理奠定了理论基础.

Controlling factors of spontaneous combustion of coal seams in the Wuda coalfield, western Inner Mongolia, China

Spontaneous combustion of coal seams is a complicated physical-chemical and environmental process and the result of integrated action of many kinds of internal causes and external conditions. The paper analyzes the internal causes and external conditions of spontaneous combustion and reveals various controlling factors in the Wuda coalfield, Inner Mongolia. The internal causes include the coal seam thickness and metamorphic grade, ash content, caloric value, sulfur content and maceral content; the external conditions include geological structure, climate, hydrogeology, topography and landforms, mode of occurrence of coal seams and mining of large mines and small coal pits. Finally, the paper discusses different prevention and control methods for spontaneous combustion of coals of different origins, which provides a theoretical basis for studying and controlling coal fire in the future.