极薄煤层综采工作面智能充填系统设计与应用

张兆海

doi:10.13272/j.issn.1671-251x.2021030091

极薄煤层综采工作面智能充填系统设计与应用

doi: 10.13272/j.issn.1671-251x.2021030091

张兆海

新矿内蒙古能源有限责任公司, 内蒙古鄂尔多斯 016200

基金项目:

国家自然科学基金山东联合基金重点项目(U1806209)。

详细信息

作者简介:
张兆海(1972-)，男，山东泰安人，高级工程师，主要从事煤矿安全生产及技术管理工作，E-mail:306229106@qq.com。

中图分类号: TD353
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出版历程
- 收稿日期: 2021-03-26
- 修回日期: 2021-10-11
- 刊出日期: 2021-12-20

Design and application of intelligent filling system for fully mechanized working face in extremely thin coal seam

ZHANG Zhaohai

Xinkuang Inner Mongolia Energy Co., Ltd., Ordos 016200, China

摘要

摘要: 目前通常采用原矸、风动泵送等充填技术对极薄煤层采空区进行充填，充填系统设计功能较为单一，缺乏多系统之间的联动，无法实现矸石的智能分选与工作面连续充填。针对上述问题，以内蒙古鄂尔多斯市新矿集团长城煤矿1901N综采工作面为研究背景，设计了极薄煤层综采工作面智能充填系统。该系统包括煤矸智能分离破碎与长距离连续运输系统、连续泵送充填系统，并配套与连续泵送充填系统相适应的充填模板支架。开采后井下的煤矸石首先通过带式输送机运送至煤矸智能分离破碎系统进行分离、破碎与筛选，然后通过管状带式输送机运送至搅拌机混合成充填用混凝土，最后通过高压管路输送至充填口进行充填。通过试验得到了适合长城煤矿极薄煤层综采工作面沿空留巷及架后采空区的充填材料的最佳配比及相应各龄期的抗压强度标准值，确定了以沿空留巷充填为主、架后采空区充填为辅的充填方案。现场实测结果表明：该系统可同时对沿空留巷及架后采空区实施精准充填，提高了充填工效和充填面推进速度，降低了动载对巷道围岩产生的影响，可有效控制巷道变形，充填留巷两帮收敛和顶底板最大移近量分别为133.5、178.2 mm，均在合理控制范围内，满足现场应用需求。
- 综采工作面 /
- 极薄煤层 /
- 矸石 /
- 煤矸分离 /
- 智能充填 /
- 沿空留巷充填 /
- 架后采空区充填
Abstract: At present, the filling technologies such as raw gangue and pneumatic pumping are usually used to fill the goaf of extremely thin coal seam, the design function of filling system is relatively single, and the linkage between multiple systems is lacking, so the intelligent separation of gangue and the continuous filling with the working face can not be realized. In order to solve the above problems, taking the 1901N fully mechanized working face of Great Wall Coal Mine of Ordos Xinkuang Group in Inner Mongolia Autonomous Region as the research background, the intelligent filling system of fully mechanized working face in extremely thin coal seam is designed. The system comprises a coal gangue intelligent separation and crushing and long-distance continuous transportation system, a continuous pumping filling system and a filling template support matched with the continuous pumping filling system. Firstly, the mined coal gangue is transported to a coal gangue intelligent separation and crushing system by a belt conveyor for separation, crushing and screening. Secondly, the coal gangue is transported to a mixer by a tubular belt conveyor for mixing to form concrete for filling. Finally, the coal gangue is transported to a filling port by a high-pressure pipeline for filling. Through the test, the best proportion of filling materials and the corresponding compressive strength standard value of each age are obtained, which are suitable for the fully mechanized working face of extremely thin coal seam in Great Wall Coal Mine. And the filling scheme is determined, which is mainly filled along the gob-side entry retaining and supplemented by the filling of the goaf behind the support. The field measurement results show that the system can simultaneously implement precise filling along the gob-side entry retaining and the goaf behind the support, improve the filling efficiency and the advancing speed of the filling surface, reduce the impact of dynamic load on the surrounding rock of the roadway, and control the deformation of the roadway effectively. The convergence of the two sides of the filling roadway and the maximum displacement of the roof and floor are 133.5 mm and 178.2 mm respectively, which are within the reasonable control range and meet the field application requirements.
- fully mechanized working face /
- extremely thin coal seam /
- gangue /
- coal gangue separation /
- intelligent filling /
- filling along the gob-side entry retaining /
- filling in the goaf behind the support

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参考文献(16)

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