山东煤炭科技2024，Vol.42Issue(2)：117-121,5.DOI:10.3969/j.issn.1005-2801.2024.02.026
煤层隐伏露头附近工作面开采水害安全性研究
Research on the Safety of Water Hazard During Working Faces Mining Near Coal Seam Hidden Outcrops
狄超 1梁茂亮 1倪振峰2
作者信息
- 1. 单县丰源实业有限公司,山东 菏泽 274330
- 2. 山东丰源远航煤业有限公司,山东 枣庄 277000
- 折叠
摘要
Abstract
The working face mining in the shallow coal seam hidden outcrop area of Zhangji Coal Mine is threatened by the overlying loose aquifer.The original design of the 1306 working face used layered mining,which makes it difficult to improve the production and efficiency of the working face.Through FLAC3D numerical simulation and analysis of the overlying rock failure law of fully mechanized caving or large mining height fully mechanized mining under similar geological conditions,a relatively large collapse mining ratio and crack mining ratio are selected to predict the height of the"two zones",and compared with the empirical formula for predicting the height of the"two zones"in fully mechanized caving mining,the"minimum safe thickness"method is used to select the thickness of the protective layer,and the height and mining thickness of the sand control safety coal rock pillar are determined.The results show that the minimum bedrock thickness in the mining area of the 1306 working face is greater than the minimum sand control coal rock pillar thickness required for full thickness fully mechanized caving mining.The working face can adopt full thickness fully mechanized caving mining until the end of the design stop mining line,which is conducive to achieving high-yield,efficient,and safe mining in the mine.关键词
隐伏露头/数值模拟/煤岩柱高度/安全开采Key words
hidden outcrop/numerical simulation/coal rock pillar height/safe mining分类
矿业与冶金引用本文复制引用
狄超,梁茂亮,倪振峰..煤层隐伏露头附近工作面开采水害安全性研究[J].山东煤炭科技,2024,42(2):117-121,5.
