Research On The Development Of Freezing Temperature On Disturbance Soil

As the theory of freezing shaft sinking is getting development increasingly and is applicant in shaft sinking. We get a lot of important experience, these experience could be a kind of reference for the construction of shaft sinking of other coal areas, but as the same time, the geology status of our country is very complicated, these experience can not be well reference any more. This paper take a coal as engineering background, make the research on the development of freezing temperature, provide the reference for the similary constructing shaft.This research comes to collusion that:accounting of disturbed soil, thermal conductivity and specific heat of disturbed soil both decrease, this change come to a influence on the development and spread of freezing wall. Comparing with the thickness of disturbed soil, the thickness of normal soil increase very fast in early freezing time, after freezing120days, two kinds of speed is almost equally, after freezing180days, the thickness of disturbed soil and normal soil are nearly same. Comparing with the average temperature of disturbed soil, the average temperature of normal soil increase slowly in early freezing time, after freezing120days, two kinds of speed is almost equally, after freezing180days, the thickness of disturbed soil and normal soil are nearly same. On the basis of above contrary, we can get clear that disturbed soil is against to the efficiency of freezing, make the speed of spread of freezing thickness slowly, and decrease the average temperature of freezing wall. This conclusion could be a kind of important reference to the design and construction of other coal areas.