Physical and mechanical properties of outburst coal mine kno
Date:2013-11-26 Hits:
Occurred in the coal seam of coal and gas outburst, structure characteristics of coal also have significant influence on prominent. According to the survey statistics of large amount of outstanding point, have bedding disorder, coal quality soft characteristics in prominent place and nearby coal seam, people used to this kind of coal is called soft stratification, or soft coal. In the outburst coal, coal is soft is a harbinger of prominent.
The so-called soft layering or soft clumps, soft coal, compared with the normal coal seam. The coal seam was lower than that of normal coal delamination strength, has the extremely loose and friable, hand twist easily into cm, mm level even pulverized coal particles. From the analysis of geological point of view, soft layered coal belongs to the tectonic coal seam, it is product of force deformation in structure.
According to the degree of fragmentation of coal in the structure under the action of tectonic coal, divided into three types: the fractured coal; coal mylonitic coal particles.
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