A comparative study onfloor failure law in deep andshort-distance coal seam mining

被引：0

作者：

Wang H. ^{[1
,2
]}

Ju Y. ^{[3
]}

Qin K. ^{[3
]}

Hu Y. ^{[4
]}

机构：

[1] School of Geoscience and Mapping Engineering, China University of Mining & Technology-Beijing, Beijing

[2] China Coal Energy Co Ltd, Beijing

[3] School of Resources and Geosciences, China University of Mining & Technology, Xuzhou, 221116, Jiangsu

[4] College of Earth and Environment, Anhui University of Science & Technology, Huainan, 232001, Anhui

来源：

Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | 2020年 / 37卷 / 03期

关键词：

Direct current method; Floor water inrush; Short-distance coal seam;

D O I：

10.13545/j.cnki.jmse.2020.03.014

中图分类号：

学科分类号：

摘要：

Based on the analysis of and study on geological and hydrogeological conditions in Datun mining area, Ordovician limestone water is the main source of threat for water-inrush of coal floor in deep seam 7 and 8, and the failure characteristics of coal seam 8 affects the prevention and control design of Ordovician limestone water. In response to the above problem, with working face 8199 of Xuzhuang coal mine as an example, a physical simulation model has been established to simulate the floor failure characteristics under two mining conditions: single mining of coal seam 8and first mining of coal seam 7and then mining of coal seam 8. Furthermore, direct current electric method has been adopted to measure the floor failure law on the working face. It is found that the floor failure depth predicted by empirical formula and plastic mechanics theory is larger than that measured by direct current method, but close to the physical simulation results of single mining of coal seam 8, and the floor failure depth of physical simulation of mining of coal seam 7 before 8 is close to that measured by direct current method. Based on the above analysis, suggestions are put forward for predicting the floor failure depth of the newly designed deep mining face in the mining area. © 2020, Editorial Board of Journal of Mining & Safety Engineering. All right reserved.

引用

页码：553 / 561

页数：8

共 29 条

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