摘要
本文从固体力学、构造物理化学的角度分析了煤岩所受应力的来源、性质以及应力在煤变质过程中的影响方式。作者在前人研究基础上,阐述了构造动力影响过程中煤岩能量的转换形式,分析了应力在烟煤分子团聚过程中的影响。研究认为,煤岩所受的各种应力(压应力、拉应力、剪应力)为地层压力与构造动力所造成的附加内力。这种附加内力可以分解为构造附加静水压力与偏应力两部分。构造附加静水压力主要影响煤岩的物理性质,如孔隙度、颗粒性质与瓦斯吸附特征,并对煤的化学煤化过程有缓慢促进作用。偏应力主要使煤岩发生变形和位移。煤化过程中,由构造运动所产生的动能转化为各种形式的热能、表面能、弹性变形能以及声、光、电、磁等形态能量。
The impact of solid mechanics and tectonic physiochemistry on coal was analyzed in the paper from aspects of its source, characteristics and behavior. The energy transformation caused by tectonic dynamic was described based on previous research results analysis. The impact of tectonic dynamic pressure on bituminous coal moleculars＇ agglomeration process is summarized. The pressure on coal includes compressive pressure, tensile pressure, shear pressure, which are the additional inner force from the overlying formation pressure and tectonic dynamics, and it can be broken down to two parts： tectonic additional hydrostatic pressure and deviatoric pressure. Tectonic additional hydrostatic pressure mainly affects physical properties of coal such as porosity, granule properties and gas absorption and can slowly motivate chemical metamorphism process of coal. Deviatoric pressure prompts deformation and displacement in coal,and a series of energy transformation from kenetic energy to all kinds of heat energy, surface energy, elastic strain energy and acoustic photoelectromagnetism can be found in the process.
出处
《地质科学》
CAS
CSCD
北大核心
2012年第2期517-529,共13页
Chinese Journal of Geology(Scientia Geologica Sinica)
基金
国家自然科学基金项目(编号:40972106)
中央科研基本业务费项目(编号:53200959001)
中国矿业大学煤炭资源与安全开采国家重点实验室开放研究基金项目(编号:SKLCRSM10KFB02)资助
关键词
构造附加动力
煤变质
动力变质
Tectonic dynamic pressure, Metamorphism, Dynamic metamorphism
