Shandong University

Liming Yin

Wenbin Sun

Yangyang Li

Dan Kang

Ning Jiang

Yang Qiao

Yin Liu

Changjian Zhou

Shupeng Zhang

Juntao Chen

Houqian Du

Fei Zhou

Shichuan Zhang

Jinhai Zhao

Jianli Shao

Yunzhao Zhang

Xinguo Zhang

Yanchao Xue

Zhixue Zhang

The present disclosure provides a comprehensive utilization method and test equipment for surface water, a goaf and geothermal energy in a coal mining subsidence area. The method comprises the following steps: determining a geothermal water collection area, arranging heat energy exchange equipment in a main roadway, and arranging a geothermal water extraction system, wherein the geothermal water extraction system comprises geothermal wells, extraction pipelines and tail water reinjection pipelines, the extraction pipelines are connected with the heat energy exchange equipment, and the tail water reinjection pipelines are connected with a water outlet of the heat energy exchange equipment; arranging a water channel on the surface, and arranging a drainage system on a subsidence trough to guide surface water to flow underground; and controlling directional and ordered flow of surface water through the coal mining subsidence area formed by ground mining to achieve sustainable mining of underground water.

Comprehensive utilization method and test equipment for surface water, goaf and geothermal energy in coal mining subsidence area

A system and method for monitoring crack propagation of a transparent rock specimen monitors a breakage process of a specimen loading process. In the system and method for monitoring crack propagation of a transparent rock specimen, under the condition of no contact with a rock specimen, intensity changes of laser light passing through the transparent rock specimen in a loading state are determined, such that a computer () forms, according to laser intensity change data, a three-dimensional diagram of crack propagation of the transparent rock specimen () in a continuously loaded state at a plurality of set time points. This is used to analyze a breakage starting point and a crack propagation path and process of the transparent rock specimen () in the loading state, and achieve the purpose of qualitative analysis of the rock specimen.

System and method for monitoring crack propagation of transparent rock specimen

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Qingdao, China

Liming Yin