大平矿库下采煤安全影响评价

发布时间：2018-04-20 05:12

本文选题：库下采煤 + 地表移动　；参考：《中国地质大学(北京)》2015年硕士论文

【摘要】：我国是人口大国,加之改革开放以来国民经济的飞速发展,必须逐年增加煤炭资源开采量,导致易采煤资源量越来越少。若能在保证坝体与矿井的安全的基础上,开采出水体下储量大、开采难度大的煤炭资源,则可以提高经济效益,缓解能源紧张的局面。目前,中国能源较为短缺,如何高效率地安全开采出水体下的煤炭资源,既关乎煤炭科技建设,又关乎我们经济长期稳固地发展,特别重要。对水体下的采煤工作,最基本的问题包括如何发展理论,如何实践,如何随时发展新技术,如何把新科技具体地运用到经济方面,收获实际效益,这些都是要面临的大问题。本论文在总结了大平矿区自然地理与地质概况的基础上,对地表移动范围与特征(概率积分法、FLAC3D数值模拟方法)和地表水渗漏危险性(《三下规程》经验公式、数值模拟方法)等方面进行了详细的分析,主要得到以下结论:1、利用概率积分法计算,七步采完后,地表最大沉降量为10.56m,平均影响半径531.2m。2、利用FLAC3D数值模拟方法,七步采完后,地表最大沉降量为14.51m,平均影响半径为516.2m。3、S2S2工作面距离坝体的距离约为900m,大平矿库下采煤引起的地表移动影响不到坝体。4、根据《三下规程》经验公式计算,“两带”发育高度(77.82m)加上保护层厚度(4倍煤层厚度46m)为123.82m。5、利用数值模拟方法计算,“两带”发育高度(94.5m)加上留设防水煤柱高度(4倍煤层厚度46m)为140.5m。6、开采1、2#煤层引起的“两带”发育的最上端,位于白垩系的相对隔水层,上覆还有第四系的隔水层,所以不会引起地表水向矿井渗漏。
[Abstract]:With the rapid development of the national economy since the reform and opening up, China is a large country with large population, so it is necessary to increase the exploitation of coal resources year by year, resulting in less and less coal resources easily mined. On the basis of ensuring the safety of the dam body and the mine, the coal resources with large reserves under the water body and great difficulty in mining can be exploited, which can improve the economic benefit and alleviate the energy shortage. At present, there is a shortage of energy in China. How to exploit coal resources under water body efficiently and safely is not only related to the construction of coal science and technology, but also to the long-term steady development of our economy, which is particularly important. For coal mining under water body, the most basic problems include how to develop theory, how to practice, how to develop new technology at any time, how to apply new technology to economy, and how to harvest actual benefits. On the basis of summarizing the general situation of physical geography and geology in Daping mining area, this paper gives an empirical formula for the range and characteristics of surface movement (probability integration method / FLAC3D numerical simulation method) and the surface water leakage risk (< three lower regulations >). Numerical simulation method) and other aspects are analyzed in detail. The following conclusions are obtained: 1: 1, calculated by probability integration method, the maximum surface subsidence is 10.56 m after the seven-step harvest, and the average influence radius is 531.2 m.2.Using the FLAC3D numerical simulation method, after the seven-step harvest, the maximum subsidence is 10.56 m, and the average influence radius is 531.2 m 路2. By using the FLAC3D numerical simulation method, after the seven-step harvest, The maximum surface subsidence is 14.51 m, the average radius of influence is 516.2m.3S2S2 and the distance from the face to the dam body is about 900m. The surface movement caused by coal mining under the Daping Mine Reservoir can not affect the dam body .4. the calculation is based on the empirical formula of "three Lower rules". The development height of "two zones" (77.82 m) and the thickness of coal seam of 4 times thickness of protective layer are 123.82 m. 5. Calculated by numerical simulation method, The development height of "two zones" is 94.5 m) and the thickness of coal seam with 4 times the height of waterproof coal pillar is 140.5m. 6. The uppermost end of "two zones" developed by mining 12# coal seam is located in the relative water-isolating layer of Cretaceous system, and there is also the water-isolating layer of Quaternary system. So it won't cause surface water to leak into the mine.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD82;TD79

【参考文献】