厚松散含水层下开采上限试验研究  

Experimental Research on Mining Upper Limit Under Thick Loose Aquifer

作　　者：孟文庆 赵光明[1,2] 许文松[1,2] 孟祥瑞[1,2] MENG Wenqing;ZHAO Guangming;XU Wensong;MENG Xiangrui(Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines*Anhui University of Science and Technology,Huainan,Anhui 232001,China;College of Energy and Safety,Anhui University of Science and Technology,Huainan,Anhui 232001,China)

机构地区：[1]安徽理工大学深部煤矿采动响应与灾害防控国家重点实验室,安徽淮南市232001 [2]安徽理工大学能源与安全学院,安徽淮南市232001

出　　处：《矿业研究与开发》2021年第6期5-10,共6页Mining Research and Development

基　　金：安徽省重点研究与开发计划项目(201904a07020010);安徽省“省特支计划”的领军人才项目;国家自然科学基金项目(51974009,51674008);国家重点研发计划项目(2017YFC0603003);安徽省学术和技术带头人科研活动经费项目(2018D187);高校优秀拔尖人才培育资助项目(gxbjZD2016051);安徽高校科研平台创新团队建设项目。

摘　　要：合理留设安全煤岩柱对厚松散含水层下安全开采、解放浅部煤炭资源有着重要意义。基于袁店二矿地质采矿条件,采用数理分析、实验室试验、相似模拟和数值模拟的手段,对影响垮落带高度主要因素进行敏感性分析,建立了垮落带高度理论公式,并且验证了新建理论公式的准确性。研究结果表明:基岩风化带内黏土矿物含量高、渗透能力差、再生隔水能力强,具有阻止和抑制导水裂隙带高度发展的双重作用;采高是影响垮落带高度的主要因素,敏感度达到0.74;工作面前方存在超前支撑压力,岩层受压导致温度升高,覆岩受拉产生裂缝,致使温度降低;最终形成的垮落带最大高度为10.3 m,导水裂隙带最大高度为57.5 m。根据研究成果,可提高工作面开采上限30 m,解放煤炭约28.7万吨。Reasonable leaving coal and rock pillar has a great significance for safe mining under thick loose aquifer and for liberation of shallow coal resource. Based on the geological mining conditions of Yuandian No.2 Mine, mathematical analysis, laboratory tests, similar simulation and numerical simulation were used to analyze the sensitivity of major factors affecting the height of the caving zone, a theoretical formula for the height of the caving zone was established, and the accuracy of the new theoretical formula was verified. The study results show that, the high content of clay minerals, poor permeability, as well as strong regeneration capacity and separating ability in the bedrock weathering zone, have the dual roles of preventing and inhibiting the development of the height of the water conduction fissure zone. The mining height is the main factor affecting the height of the caving zone, with the sensitivity of 0.74. There is advanced supporting pressure in front of the working face, the rock layer is compressed to cause the temperature to rise, and the cover rock is affected by tensile stress to produce cracks, which reduces temperature. The maximum height of the formed caving zone is 10.3 m, and the maximum height of the water conduction fissure zone is 57.5 m. According to the research results, the mining upper limit of the working face can be increased by 30 m, and the liberation amount of coal resource is 287 000 tons.

关 键 词：安全煤岩柱 垮落带 数理分析 相似模拟 数值模拟 

分 类 号：TD822.3[矿业工程—煤矿开采]