Six new faults have been discovered in addition to modifying the location and drop of the original faults,furthermore,a better grasp of the distribution,the development status,the scope and the stretch of all the faults in opencast coal mine are available, which will give a much more reliable geological gu.

The feasibility research on two-cavity in one mould to simple forgings,forgings with a big section difference and forgings with drop is concerned in the paper.

In free status, dry shrinkage of expansive concrete with expansive agent is the same with common concrete; in restrain status, compressive stress is the main reason causing dry shrinkage fall increasing in expansive concrete; the technical measures which are effective for reducing common concrete dry sh.

The industrial experiment and research have been made to air delivery of cement(flyash) with a large fall.

The study results showed that the effect of density on laminar bottom in elevation difference pipeline is distinct and can not been ignored.

An intermixing model of elevation difference batching transportation is established.

A New Method of Predicting throw and Strikeextended Lenghth of Coal Fault;

The parameters of Quaternary fault activities such as the growth index,fault throw and fault activity rate are calculated to analyze the characteristics of fault activities in the Huimin subbasin and four orders of subbasin-controlling faults are distinguished.

Some conclusions drawn from the fault throw analysis of Zhen①、Zhen②' and Zhen② faults,are as follows:Zhen① fault forms in Taizhou period and acts intensively in Funing period.

With deep development of oilfield and decrease of reservoir energy, it is used water injection to renew reservoir power and selected fall test to acquire geology characteristic and injected situation.