宿南矿区岩溶陷落柱发育特征及其导水性研究

发布时间：2018-07-25 10:25

【摘要】：随着浅部资源的逐步枯竭,煤矿工程不断的向深部推进,规模不断的扩大,采场地应力及底板承压水水压也随之增大,煤层底板水害问题变得愈加突出。在底板水害中,陷落柱属于最具有危险性的大型的隐伏性的灾害。宿南矿区目前已经有陷落柱揭露以及由此产生的淹井事故,因此开展岩溶陷落柱的探查、评价与治理研究,对于煤矿的安全生产是十分必要的。根据宿南矿区现有的钻探物探勘探资料以及现场施工情况,对陷落柱的数目、形态、揭露方式、出水情况等进行了统计,分析了陷落柱的发育与分布特征,探讨陷落柱的控制因素;结合桃园煤矿陷落柱工程治理案例,分析陷落柱探查及其治理的一般过程。主要成果有:(1)宿南矿区共发现陷落柱8个,其平面形态以椭圆形居多,仅一个似圆形;剖面形态以圆锥体为主。(2)矿区内陷落柱分为导水和不导水性两种类型,陷落柱导水性与柱体内部充填物胶结和压实程度以及陷落柱冒落高度有关,不导水型陷落柱较导水型陷落柱冒落高度大,且内部充填物泥岩类含量较高成分混杂,胶结压实程度较好。(3)宿南矿区岩溶陷落柱分布与岩溶发育相似,具有不均匀性,受构造、地形、地下水的控制,主要发育在构造应力集中、地形低洼、地下水径流强的区域。构造为其中最主要的控制因素,在构造应力集中区成群、成带分布,且大多数陷落柱长轴方向与构造线方向基本一致。(4)以桃园3#陷落柱治理工程案例为例,总结了陷落柱治理的一般步骤。生产前采用物探手段圈定异常区,查清陷落柱发育的边界、高度、形态等参数,判定其导水性,后期针对具体情况采用注浆改造、煤柱留设等工程治理手段,确保煤矿的安全生产。
[Abstract]:With the gradual depletion of shallow resources, the coal mine engineering continues to advance to the deep, the scale of the continuous expansion, mining site stress and bottom pressure water pressure also increases, the coal seam floor water hazard problem becomes more and more prominent. In the bottom water disaster, the collapse column is the most dangerous and large hidden disaster. At present, there are collapse columns exposed in Sunan mining area and the flooding accidents arising therefrom. Therefore, it is very necessary for the safety production of coal mine to carry out the exploration, evaluation and treatment of karst collapse pillars. Based on the existing drilling geophysical exploration data and site construction situation in Sunan mining area, the number, shape, exposure mode and outlet condition of subsided columns are statistically analyzed, and the development and distribution characteristics of collapse columns are analyzed. This paper probes into the controlling factors of the collapse pillar and analyzes the general process of the exploration of the subsided pillar and its treatment in combination with the case of the caving pillar project in Taoyuan coal mine. The main results are as follows: (1) there are 8 collapse columns found in Sunan mining area, whose plane shape is mostly elliptical, only one is round, and the profile is mainly conical. (2) the collapse column in the mining area is divided into two types: water conduction and unconductivity. The water conductivity of the collapse column is related to the cementation and compaction degree of the inner filling of the column and the collapse height of the collapse pillar. The collapse height of the collapsible column of the unguided type is larger than that of the collapse column of the type of water conduction, and the content of mudstone in the inner filling is mixed with each other. (3) the distribution of karst collapse column in Sunan mining area is similar to that of karst development, which is controlled by structure, topography and groundwater, and is mainly developed in areas where tectonic stress is concentrated, topography is low, and groundwater runoff is strong. Structure is the most important controlling factor. It is distributed in clusters and belts in tectonic stress concentration areas, and the direction of the long axis of most collapse columns is basically the same as the direction of structural lines. (4) A case study of the Taoyuan fall column treatment project is taken as an example. The general steps of treatment of collapse column are summarized. Before production, geophysical exploration is used to delineate abnormal areas, to find out the boundary, height, shape and other parameters of the development of subsided columns, and to determine its water conductivity. In the latter stage, engineering treatment means such as grouting transformation and coal pillar retaining are adopted in the light of specific conditions. Ensure the safety of coal mine production.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD745

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