深部近距离煤层开采底板破坏规律实测对比研究  

A comparative study on floor failure law in deep and short-distance coal seam mining

作　　者：王厚柱 鞠远江[3] 秦坤坤 胡友彪[4] WANG Houzhu;JU Yuanjiang;QIN Kunkun;HU Youbiao(School of Geoscience and Mapping Engineering,China University of Mining&Technology-Beijing,Beijing 100083,China;China Coal Energy Co Ltd,Beijing 100120,China;School of Resources and Geosciences,China University of Mining&Technology,Xuzhou,Jiangsu 221116,China;College of Earth and Environment,Anhui University of Science&Technology,Huainan,Anhui 232001,China)

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083 [2]中国中煤能源集团股份有限公司,北京100120 [3]中国矿业大学资源与地球科学学院,江苏徐州221116 [4]安徽理工大学地球与环境学院,安徽淮南232001

出　　处：《采矿与安全工程学报》2020年第3期553-561,共9页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(41472235)。

摘　　要：基于大屯矿区地质和水文地质条件的分析与研究,奥灰水是深部7、8煤层开采底板突水的最主要威胁源,8煤底板破坏特征影响奥灰水防治设计。以矿区徐庄矿8199工作面为例,建立物理模拟模型,对单采8煤层及先采7煤后采8煤两种开采条件下底板破坏特征进行了模拟。并利用直流电法对该工作面开采过程的底板破坏规律进行了实测。发现压煤开采规范中经验公式预估和塑性力学理论预估获得的底板破坏深度值比直流电法实测值偏大,与单采8煤的物理模拟结果较为接近;物理模拟先采7煤后采8煤的底板破坏深度与直流电法实测值较为接近。基于以上分析对矿区新设计深部开采近距离煤层工作面底板破坏深度预估方法提出了建议。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 8 and first mining of coal seam 7 and 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.

关 键 词：近距离煤层 底板突水 直流电法 

分 类 号：TD325[矿业工程—矿井建设]