综放工作面端头区煤岩的冒放规律及合理工艺参数

发布时间：2018-04-23 21:25

本文选题：综放开采 + 端头放煤　；参考：《采矿与安全工程学报》2017年03期

【摘要】：为实现端头顶煤的最大化回收,根据端头区排头支架所处工作面位置、架型和工作面地质技术条件,建立了端头放煤三维模型,分析了端头区不同放煤区域和工艺参数对煤岩放落流动的影响规律以及顶煤回收率。研究发现随着端头区排头支架放煤架数增多,煤矸的位移矢量和运移范围明显增大,应力向工作面前方、巷道及煤柱侧转移,煤矸分界线变得不清晰,放出率减小、含矸率增大;根据顶煤回收率及对巷道稳定性的影响,把端头区顶煤划分为易放煤区、较易放煤区和较难放煤区,端头放煤以易放煤区和较易放煤区为主。由此提出了端头区放煤的原则,确定了端头区放煤的工艺方式和相关参数,现场应用取得了良好的技术经济效果。
[Abstract]:In order to maximize the recovery of coal at the top of the end, according to the position of the working face, the type of frame and the geological conditions of the working face, a three-dimensional model of coal caving at the end head is established. The influence of different coal drawing areas and process parameters on the flow of coal and rock caving and the recovery rate of top coal are analyzed. It is found that the displacement vector and migration range of coal gangue are obviously increased with the increase of the number of caving supports in the end head area, the stress moves to the front of the face, the roadway and the coal pillar transfer, the boundary of coal and gangue becomes unclear, and the discharge rate decreases. According to the effect of the recovery rate of top coal and the influence on the stability of roadway, the top coal in the end head area is divided into easy caving area, easy caving area and difficult coal caving area, and the easy caving area and easy coal caving area are the main caving areas at the end of coal caving. Therefore, the principle of coal drawing in the end end area is put forward, the process mode and relevant parameters of the coal drawing area are determined, and good technical and economic results are obtained in the field application.
【作者单位】：中国矿业大学矿业工程学院深部煤炭资源开采教育部重点实验室;兖矿集团有限公司;
【基金】：国家自然科学基金项目(51574220)
【分类号】：TD823.97

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