长安煤矿河流下综放开采技术研究

发布时间：2019-06-19 13:02

【摘要】：长安煤矿具有大采高、浅埋深的特点,在开采过程中4113工作面受到地表水体邵家湾沟的威胁。本文以该矿地表水体特征、水文地质特征、煤层赋存条件为研究背景,以长安煤矿4113采煤工作面在为研究对象,研究在采用综放采煤工艺开采的情况下,上覆岩层移动、变形特点,确定导水裂隙带高度、预测“两带”发育及涌水量和安全开采方案。在研究过程中,通过对水文地质条件的分析,明确了各含(隔)水层的性质及其影响大小;通过相似材料模拟手段和数值模拟方法,分析了工作面上覆岩层的破坏过程和范围;应用类比工程,得出在相近开采条件下的导水裂隙发育高度。研究结果表明,在邵家湾沟河流下,4113工作面可采用限制采高的方法进行综放安全开采。当采高在8m以下(采出率85%),预计导水裂隙带的发育高度不足以导通邵家湾沟河流,采取相应的综合防治水措施后,实施开采是安全、可行的。
[Abstract]:The Changan Coal Mine has the characteristics of high mining height and shallow buried depth. In the mining process, the 4113 working face is threatened by the surface water body Shao Jiwan. Based on the characteristics of the surface water, the hydrogeology and the occurrence conditions of the coal seam, this paper takes the coal face of the 4113 coal face of Changan Coal Mine as the research object, and studies the movement and deformation characteristics of the overlying strata under the condition of the mining of the fully-mechanized top-coal caving mining, and determines the height of the water guide slit belt. The development of the "two-band" and the water inflow and the safety mining plan are predicted. In the course of the study, through the analysis of the hydrogeological conditions, the properties and the influence of each water-bearing layer are defined. The damage process and range of the overburden on the working surface are analyzed by means of similar material simulation and numerical simulation, and the analogy works are applied. The development height of water-conducting fracture under similar mining conditions is obtained. The results show that under the river of Shajia Bay,4113 working face can adopt the method of limiting the mining height to carry out fully-mechanized top-coal caving safety mining. When the mining height is below 8 m (the production rate is 85%), it is predicted that the development height of the water-guide slit belt is not enough to conduct the river of the Shajia Bay, and after the corresponding comprehensive prevention and control measures are taken, it is safe and feasible to carry out the exploitation.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD823.83

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