Field Research: Measuring Water Pressure Resistance in a Fault-Induced Fracture Zone
Field Research: Measuring Water Pressure Resistance in a Fault-Induced Fracture Zone
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DOI：
10.1007/s10230-014-0323-3
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发表时间：
2015-09
影响因子：
2.8
通讯作者：
De-xian Liang;Zhenquan Jiang;Y. Guan
中科院分区：
文献类型：
--
作者：
De-xian Liang;Zhenquan Jiang;Y. Guan
采场煤层底板突水事故往往与断层结构有关，断层结构的抗水能力小于完整煤层底板。最近开发了一种新的原位抗水能力试验方法，并将其用于确定正断层剖面的抗水性能。现场试验确定了初始渗流条件、渗流稳定后的渗流状态以及抗水能力的测量与计算。试验结果用于计算单位抗渗破坏强度，这是抗水压能力的量化。这样的试验可以更好地评价采煤的安全性，以及在推测突水威胁下的煤层能否在不对下伏承压含水层进行脱水或降压的情况下安全开采。
Seam floor water-inrush accidents in mine stopes are often associated with fault structures in which water pressure resistance capacities are less than that of the intact seam floor. A new in situ water resistance capacity test was recently developed and used to determine the water resistance properties of a section of a normal fault. The in situ tests defined initial seepage conditions, the state of seepage after flow stabilized, and the measure and calculation of water resistance capability. The test results were used to calculate the unit seepage failure resistance strength, a quantification of the water pressure resistance capacity. It appears that such tests can be used to better evaluate the safety of coal extraction, and whether coal seams under inferred threat from water inrushes can be excavated safely without dewatering or depressurizing the underlying confined aquifers.