特拉布拉露天煤矿端帮采煤技术研究
发布时间：2018-09-15 07:12
【摘要】：由于我国近些年来对于煤炭政策的调整，煤炭资源企业整合转型，井工煤矿转露天煤矿的实例越来越多，导致露天矿的数量与规模随之增加。特别是在内蒙古准格尔地区和神东矿区，山西河保偏矿区和平朔矿区以及西南地区的云南昭通区、小龙潭矿区的一些露天矿，普遍存在煤层厚度小，煤层数目较多，煤层总体厚度大的情况，拥有较大的端帮压煤量，其中不乏煤质优秀的煤矿，如果采用端帮采煤机进行开采，，对于企业可能会有较大的收益以及更加持久发展的意义。在我国，端帮采煤机在一些地区已投入使用，但总体而言尚未普及，仍具有很大的研究意义。端帮联合采煤机继承了传统的端帮采煤技术优势，且在新技术运用方面更加先进，具有模块化、集成化和自动化的优点的系统，操作简易，维护简便，生产效率很高。 本文结合特拉布拉露天煤矿煤矿的实际情况，通过查阅资料、现场调研、理论分析、数值模拟等方法进行研究。本文主要研究内容包括：（1）研究端帮掘进工作面煤柱的受力情况，分析顶板岩梁是“简支梁”还是“固定梁”的情况，确定了煤柱对顶板的“夹持”作用较小，岩梁可按“简支梁”处理；（2）根据分析结果，用现有的几种房柱设计经验公式验算特拉布拉露天煤矿煤柱设计的合理性，即威特克计算公式、英国经验公式、美国经验公式和西安设计院经验公式和Wilson公式，得出Wilson公式更适合实际情况；（3）建立主采煤层Ⅲ-2煤端帮掘进工作面的数值模拟，并监测巷道开挖后的围岩受力、围岩的位移以及塑性区域的破坏情况，通过数值模拟得出开挖4个巷道后有围岩才出现塑性破坏区，基本达到了不影响端帮掘进工作面安全开采的要求。鉴于端帮采煤机采煤的特性，支护的方法过于昂贵而且不必要，应采取快速掘进、快速回填压帮的办法；（4）通过数值模拟验证了经优化后的参数的合理性。 验证了特拉布拉露天煤矿主采煤层Ⅲ-2煤煤柱设计的合理性并对其进一步优化，对巷道破坏的情况提供监测数据。为端帮采煤机采煤技术在露天矿的运用提供参考。
[Abstract]:Due to the adjustment of coal policy in recent years and the transformation of coal resource enterprises, there are more and more examples of coal mine switching to open pit coal mine, which leads to the increase of the number and scale of open pit mine. Especially in the Zhunger and Shendong mining areas in Inner Mongolia, in the Hebao and Pingshuo mining areas in Shanxi Province, in Zhaotong district in Yunnan Province in the southwest, and in some open pit mines in Xiaolongtan mining area, the coal seam thickness is small and the number of coal seams is relatively large. In the case of large coal seam thickness, there is a large amount of end and side coal pressure, among which there are many coal mines with excellent coal quality. If the coal mining machine is adopted, it may have a larger profit and more sustainable development significance for the enterprise. In our country, the end-side shearer has been put into use in some areas, but it has not been popularized in general, and still has great significance in research. The combined end and end shearer inherits the advantages of the traditional end and end coal mining technology, and is more advanced in the application of new technology. It has the advantages of modularization, integration and automation. It is easy to operate, easy to maintain and highly efficient in production. Based on the actual situation of Trabra opencast coal mine, this paper studies on the methods of consulting data, field investigation, theoretical analysis, numerical simulation and so on. The main contents of this paper are as follows: (1) to study the stress on the coal pillar in the end side heading face, to analyze whether the roof slab beam is a "simple supported beam" or a "fixed beam", and to determine that the coal pillar has less "clamping" effect on the roof. Rock beams can be treated as simply supported beams. (2) according to the results of analysis, the rationality of the design of coal pillars in Trabra opencast coal mine is verified by using several kinds of empirical formulas for the design of house pillars, that is, the Whitaker formula and the British empirical formula. American empirical formula, Xi'an Design Institute empirical formula and Wilson formula, it is concluded that Wilson formula is more suitable for the actual situation. (3) numerical simulation of the main coal seam 鈪
本文编号：2244144
[Abstract]:Due to the adjustment of coal policy in recent years and the transformation of coal resource enterprises, there are more and more examples of coal mine switching to open pit coal mine, which leads to the increase of the number and scale of open pit mine. Especially in the Zhunger and Shendong mining areas in Inner Mongolia, in the Hebao and Pingshuo mining areas in Shanxi Province, in Zhaotong district in Yunnan Province in the southwest, and in some open pit mines in Xiaolongtan mining area, the coal seam thickness is small and the number of coal seams is relatively large. In the case of large coal seam thickness, there is a large amount of end and side coal pressure, among which there are many coal mines with excellent coal quality. If the coal mining machine is adopted, it may have a larger profit and more sustainable development significance for the enterprise. In our country, the end-side shearer has been put into use in some areas, but it has not been popularized in general, and still has great significance in research. The combined end and end shearer inherits the advantages of the traditional end and end coal mining technology, and is more advanced in the application of new technology. It has the advantages of modularization, integration and automation. It is easy to operate, easy to maintain and highly efficient in production. Based on the actual situation of Trabra opencast coal mine, this paper studies on the methods of consulting data, field investigation, theoretical analysis, numerical simulation and so on. The main contents of this paper are as follows: (1) to study the stress on the coal pillar in the end side heading face, to analyze whether the roof slab beam is a "simple supported beam" or a "fixed beam", and to determine that the coal pillar has less "clamping" effect on the roof. Rock beams can be treated as simply supported beams. (2) according to the results of analysis, the rationality of the design of coal pillars in Trabra opencast coal mine is verified by using several kinds of empirical formulas for the design of house pillars, that is, the Whitaker formula and the British empirical formula. American empirical formula, Xi'an Design Institute empirical formula and Wilson formula, it is concluded that Wilson formula is more suitable for the actual situation. (3) numerical simulation of the main coal seam 鈪
本文编号：2244144
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