An Approach to Dynamic Disaster Prevention in Strong Rock Burst Coal Seam under Multi-Aquifers: A Case Study of Tingnan Coal Mine

Xinxin Zhou, Zhenhua Ouyang, Ranran Zhou, Zhenxing Ji, Haiyang Yi, Zhongyi Tang, Bo Chang, Chengcheng Yang and Bingcheng Sun
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Xinxin Zhou: North China Institute of Science and Technology, Langfang 065201, China
Zhenhua Ouyang: North China Institute of Science and Technology, Langfang 065201, China
Ranran Zhou: North China Institute of Science and Technology, Langfang 065201, China
Zhenxing Ji: North China Institute of Science and Technology, Langfang 065201, China
Haiyang Yi: North China Institute of Science and Technology, Langfang 065201, China
Zhongyi Tang: Shaanxi Changwu Tingnan Coal Industry Co., Ltd., Xianyang 713602, China
Bo Chang: Shenhua Xinjiang Energy Co., Ltd., Urumchi 830027, China
Chengcheng Yang: Shaanxi Changwu Tingnan Coal Industry Co., Ltd., Xianyang 713602, China
Bingcheng Sun: Shenhua Xinjiang Energy Co., Ltd., Urumchi 830027, China

Energies, 2021, vol. 14, issue 21, 1-15

Abstract: In order to prevent the multi-dynamic disasters induced by rock burst and roof water inrush in strong rock burst coal seams under multi-aquifers, such as is the case with the 207 working face in the Tingnan coal mine considered in this study, the exhibited characteristics of two types of dynamic disasters, namely rock burst and water inrush, were analyzed. Based on the lithology and predicted caving height of the roof, the contradiction between rock burst and water inrush was analyzed. In light of these analyses, an integrated method, roof pre-splitting at a high position and shattering at a low position, was proposed. According to the results of numerical modelling, pre-crack blasting at higher rock layers enables a cantilever roof cave in time, thereby reducing the risk of rock burst, and pre-crack blasting at underlying rock layers helps increase the crushing degree of the rock, which is beneficial for decreasing the caving height of rock layers above goaf, thereby preventing the occurrence of water inrush. Finally, the proposed method was applied in an engineering case, and the effectiveness of this method for prevention and control of multi-dynamics disasters was evaluated by field observations of the caving height of rock layers and micro-seismic monitoring. As a result, the proposed method works well integrally to prevent and control rock burst and water inrush.

Keywords: multi-aquifers; rock burst; roof pre-splitting; multi-dynamic disasters; integrated prevention and control (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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