西部缺水矿区地下水库保水的库容研究

发布时间：2018-07-25 15:10

【摘要】：利用井下采空区进行水源蓄存和循环利用的地下水库技术是实现西部矿区保水采煤的有效措施,研究确定采空区的合理储水容量对于地下水库技术的安全高效实施至关重要。综合采用理论分析、模拟实验与现场实测等手段,就地下水库储水容量计算、以及极限库容与合理库容的确定等问题进行了研究,结果表明:地下水库的储水容量即为储水范围内覆岩垮落带破碎岩块间自由空隙量与裂隙带断裂岩层离层裂隙量的总和;基于覆岩垮落带类抛物空间形态模型的构建,得到了考虑煤层倾角条件下垮落带岩体空隙量的计算公式;利用覆岩采动裂隙分布的"O"形圈理论模型,获得了覆岩各层关键层底界面及相邻关键层间断裂岩层的离层空隙量确定方法;由此根据储水水位在覆岩垮裂带内的不同位置,建立了地下水库储水容量的数学表达式,形成了地下水库极限库容与合理库容的确定方法,指导了李家壕煤矿地下水库工程实践。
[Abstract]:The underground reservoir technology of water storage and recycling in underground goaf is an effective measure to realize water and coal conservation in western mining area. It is very important to study and determine the reasonable water storage capacity of goaf for the safe and efficient implementation of underground reservoir technology. By means of theoretical analysis, simulation experiment and field measurement, the calculation of water storage capacity of underground reservoir and the determination of limit and reasonable storage capacity are studied. The results show that the water storage capacity of the underground reservoir is the sum of the free void between the broken rock blocks in the overburden collapse zone and the free gap between the fractured rock layers in the fracture zone within the water storage range, and based on the construction of the parabolic space morphological model of the overlying caving zone. A formula for calculating the voids of rock mass in caving zone under the condition of coal seam dip angle is obtained, and the "O" circle theoretical model of mining fracture distribution in overburden rock is used. In this paper, the method of determining the voids in the separated layers of the bottom interface of the key layers of overburden and adjacent key layers is obtained, and the mathematical expression of the water storage capacity of the underground reservoir is established according to the different positions of the water storage water level in the collapse zone of the overburden rock. The method of determining the limit and reasonable storage capacity of underground reservoir is formed and the engineering practice of underground reservoir in Lijiagou Coal Mine is guided.
【作者单位】：中国矿业大学物联网(感知矿山)研究中心;矿山互联网应用技术国家地方联合工程实验室;中国矿业大学煤炭资源与安全开采国家重点实验室;
【基金】：国家重点基础研究发展计划(973)资助项目(2013CB227904) 国家重点研发计划资助项目(2016YFC0501100) 国家自然科学基金资助项目(51604259)
【分类号】：TV697;TD823

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