Research on Permeability Enhancement Model of Pressure Relief Roadway for Deep Coal Roadway Strip

Author:

Wang Zhonghua123ORCID,Cao Jianjun23,Liu Jun23,Li Chengcheng23

Affiliation:

1. College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China

2. China Coal Technology Engineering Group Chongqing Research Institute, Chongqing 400037, China

3. State Key Laboratory of gas Disaster Monitoring and Emergency Technology, Chongqing 400037, ), China

Abstract

Aiming at the problem of permeability enhancement in deep coal roadway strip, it proposed a pressure relief roadway permeability enhancement model, and the model was verified through experiments, theoretical calculations, and field tests. The experiment reveals that the unloading of gas-containing coal can achieve the effect of permeability enhancement. Theoretical calculation shows that with the increase of the distance from the coal seam, the overlying coal seam’s permeability enhancement multiple and the width of the significant permeability enhancement zone gradually decrease, and the width of the general permeability enhancement zone gradually increases and then stabilizes. Field tests show that the pressure relief roadway is arranged 9 m directly below the coal seam; the overlying coal strata has a significant pressure relief and permeability enhancement effect. This research can provide reference value for the high-efficiency permeability enhancement in the deep coal roadway strip.

Funder

Chongqing Natural Science Foundation General Project

Publisher

Hindawi Limited

Subject

General Earth and Planetary Sciences

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