摘要
郭二庄煤矿位于河北省武安市以北20km,隶属于金牛能源邯郸矿业集团管辖。郭二庄煤矿是解放前投产的老矿井,已生产多年,历史上一直开采大煤(2#),随着科技发展和开采条件的不断提高,占总储量近一半的下组煤(9#)首采工作面已布置完成并准备开采。在开采9#煤时受到本溪灰岩和下部奥陶系灰岩强含水层的威胁,矿井突水概率较开采上组煤有明显增大。尽管现在奥陶系水位在9#煤层以下,但在雨季会有大幅度的上升,形成带压开采,在实施带压开采时,有必要对其水文地质条件、矿井防治水措施进行综合分析和评价。为保证底板安全,必须对底板地质、水文地质条件进行全面分析研究,从而解决本溪灰岩、奥陶系灰岩水的防治难题。
本论文以郭二庄煤矿9#煤首采工作面为研究对象,深入研究了矿区水文地质条件,详细论述了矿区地下水系统基本特征,重点研究了在巨厚火成岩顶板、奥陶系灰岩强含水层底板等复杂地质条件下,下部本溪灰岩和奥陶系灰岩的富水性分布规律,评价奥陶系和本溪灰岩界面的含水性及裂隙发育情况;在巨厚火成岩特殊条件下,研究采矿、掘进现状水文地质条件,并对首采工作面提出防治水的建设性措施与建议。它不仅对郭二庄煤矿首采工作面的安全开采奠定了基础,而且对整个矿区,乃至整个地区的下组煤开采起到推动作用。
The mine of Guo Erzhuang is located at 20 kilometers north from the city of WuAn in HeBei Province, which is belonging to HanDan Mining Group in JinNiu Energy Group. The mine of Guo Erzhuang is an old mine which has produced for many years since liberation. In the history, the number 2 mine bed has mostly been exploited, which is usually called“DaMei”. With the durative developments of science and technology and mining conditions,the first coalface of the number 9 coal seam has been collocated and arranged to be mined, and the under-group coal seams are accounting for nearly half of the total reserves. The probability of mine water inrush when the number 9 coal seam is exploited will be bigger than when the upper-group seams are exploited, for when exploited, it will be threatened by the limestone aquifer in the Benxi formation and the Ordovician. Although the water level in the Ordovician is below the number 9 coal seam, it will ascend in the raining season in a large extent. And the pressure will be strong when it is exploited. When carrying into execution under the strong press, it is necessary to analyze and estimate the hydrogeology condition and the mine water controlling measures synthetically. In order to ensure the safety of the motherboard, it is necessary to analyze and study the geology and the hydrogeology condition of the motherboard. And the problem of the limestone aquifer prevention in the Benxi formation will be solved accordingly.
In this thesis, I take the first coalface of the number 9 coal seam of the mine of Guo Erzhuang as research object. Then I profoundly study the hydrogeology condition of the mining area, discuss in detail the basic characteristics of groundwater systems of the mining area, emphasize on the study of the distribution law of the limestone aquifer in the Benxi formation and the Ordovician, under the geological conditions of the thick igneous rock roof and the strong limestone aquifer in the Ordovician, and estimate the rich aquifer and fracture development conditions of the interface in the Benxi formation and the Ordovician. Some constructive measures and suggestions aiming at preventing the limestone aquifer and the geological conditions will be proposed under the special conditions in the mine when exploit and drivage. It not only lays a foundation to the safety exploitation of the first coalface in the mine of Guo erzhuang, but also plays a promoting effect to the whole mine and even mining of the under-group coal seams in the whole region.
引文
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