A Case Study of Damage Energy Analysis and an Early Warning by Microseismic Monitoring for Large Area Roof Caving in Shallow Depth Seams. (21st May 2015)

• Record Type: Journal Article
• Authors: Wei, Like; Qi, Qingxin; Li, Hongyan; Zhang, Bin; Wang, Yongren; Kong, Linghai
• Other Names: Liu Shimin Academic Editor.
• Is Part Of: Shock and vibration. Volume 2015(2015)
• Publication Date: 2015-05-21
• Subjects: Shock (Mechanics) -- Periodicals; Vibration -- Periodicals; 534.5
• DOI: 10.1155/2015/709459
• Languages: English
• ISSNs: 1070-9622

Abstract

Abstract : Shallow depth coal seams are widely spread in Shendong mining area, which is located in the Northwestern region of China. When working face is advanced out of concentrated coal pillar in upper room and pillar goaf, strong strata behaviors often cause support crushing accidents, and potentially induce large area residual pillars instability and even wind blast disaster. In order to predict the precise time when the accident happens, guaranteeing life-safety of miner, microseismic monitoring system was for the first time applied in shallow coal seam. Based on damage mechanics correlation theory, the damage energy model is established to describe relationship between damage level and cumulative energy of microseismic events. According to microseismic monitoring data of two support crushing accidents, the damage energy model is verified and an effective early warning method of these accidents is proposed. The field application showed that the early warning method had avoided miners suffering from all support crushing accidents in Shigetai coal mine.