School of Resources and Geosciences, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China.
School of Earth Sciences, Zhejiang University, Hangzhou, 310027, Zhejiang, China.
Environ Sci Pollut Res Int. 2023 Apr;30(20):57518-57528. doi: 10.1007/s11356-023-26615-z. Epub 2023 Mar 25.
Bed-separation water inrush (BSWI) is a new type of coal mine disaster that has caused serious damage. The shortcomings of previous studies on this topic are as follows: 1) most studies focused on the BSWI mechanism, evolution, and control methods, and there is a lack of research on BSWI risk assessment methods and 2) previous risk assessment studies ignored the factors of the water yield property. First, based on the proposed BSWI engineering geological model, three first-order factors are proposed: 1) separation space between layers, 2) water production characteristics, and 3) water resistance effect. Then, eight secondary factors are determined: 1) production thickness (MT), 2) hard rock thickness (HRT), 3) improved lithology index (ILCI), 4) core recovery (CR), 5) aquifer depth (AD), 6) drilling fluid consumption (DFC), 7) protective layer thickness (PLT), and 8) self-healing potential index (SPI). Subsequently, the corresponding weights are calculated, and the multifactor superposition method is used to draw the BSWI risk map. The area is divided into three risk grades: low, medium, and high. The results are validated by observations of BSWI accidents and bed-separation water exploration and discharge boreholes in the study area. The proposed method can be used to effectively prevent BSWI disasters in other coal mines with similar geological conditions.
床层离水突水（BSWI）是一种新型的煤矿灾害，造成了严重的破坏。以往关于这个课题的研究存在以下缺点：1）大多数研究集中在 BSWI 机制、演化和控制方法上，缺乏 BSWI 风险评估方法的研究；2）以往的风险评估研究忽略了水产量特性的因素。首先，基于提出的 BSWI 工程地质模型，提出了三个一级因素：1）层间分离空间，2）产水特性，3）水阻力效应。然后，确定了八个二级因素：1）产量厚度（MT），2）硬岩厚度（HRT），3）改良岩性指数（ILCI），4）岩心回收率（CR），5）含水层深度（AD），6）钻井液消耗量（DFC），7）保护层厚度（PLT），8）自愈合潜力指数（SPI）。随后，计算了相应的权重，并采用多因素叠加法绘制了 BSWI 风险图。该区域分为低、中、高三级风险等级。通过对研究区域 BSWI 事故和床层离水勘探及排放钻孔的观察进行了验证。该方法可用于有效地预防其他具有类似地质条件的煤矿的 BSWI 灾害。
