动水条件下煤岩单轴蠕变试验监测装置研制  

Development of a device for monitoring coal rock creep tests under hydrodynamic conditions

作　　者：杨东辉[1,2] 张星星 陈晓鹏 李立 樊聪 YANG Donghui;ZHANG Xingxing;CHEN Xiaopeng;LI Li;FAN Cong(School of Coal Engineering,Shanxi Datong University,Datong 037003,China;The Cultivation Base of Shanxi Key Laboratory of Coal Mine Water Jet Technology and Equipment,Shanxi Datong University,Datong 037003,China)

机构地区：[1]山西大同大学煤炭工程学院,山西大同037003 [2]山西大同大学煤矿水射流技术与装备厅市共建山西省重点实验室培育基地,山西大同037003

出　　处：《实验技术与管理》2024年第8期156-160,共5页Experimental Technology and Management

基　　金：山西省重点研发计划项目(202304290000002);山西省基础研究计划(自由探索类)项目(20210302124355);山西省高等学校教学改革创新项目(20220861);大同市基础研究计划项目(2023055);山西大同大学产学研科研项目(2022CXY18);山西大同大学研究生科研创新项目(23CX45)。

摘　　要：开展动水作用条件下的煤岩单轴蠕变试验,对于研究蠕变特征和裂隙煤岩损伤劣化机制具有重要意义。该文研制了一套动水条件下煤岩单轴蠕变试验监测装置,装置由伺服加载系统、动水控制系统、数据采集系统组成。该装置配备了水流速度控制系统,实现了在载荷恒定条件下使用不同速度的水流对煤岩进行冲刷,且满足蠕变试验的长时加载需求,具有性能稳定、操作便捷、造价低廉等优点,能够为动水条件下煤岩蠕变试验提供参考。[Objective]Coal pillars and roadways are subjected to creep by loads and the prolonged action of underground flowing water.This phenomenon directly affects the design and construction of underground reservoirs in coal mines,as well as pumped storage power plants.Previous studies have mainly focused on the mechanical properties of coal rock assemblages or coal and rock monoliths under static,submerged water conditions.These studies did not consider the properties of coal rock fissures and the effects of circulating dynamic water.Therefore,studying the creep properties of coal and rock under dynamic water conditions is of great practical significance.This research can provide theoretical references for grouting,seepage control,and the reinforcement of fissured coal and rock bodies.In response to this demand,a uniaxial creep test monitoring device for coal rock under dynamic water conditions was developed.[Methods]We developed a uniaxial creep test monitoring device for coal-rock under dynamic water conditions.The device consisted of three main parts:a servo loading system,a dynamic water control system,and a data acquisition system.The dynamic water system included components such as a water tank,water pipes,and a flow pump.The bottom plate of the water tank was constructed from a 50 mm thick 304 stainless steel plate to ensure it can withstand the pressure during operation.The side plates were made of 4 mm thick acrylic,chosen for both strength against water pressure and the ability to facilitate visual data recording.The upper part of the tank was fitted with an opening through which the pressurized head can pass for loading purposes.To prevent water from leaking out and potentially damaging the pressure tester,the water tank was equipped with a flow channel.A water pipe connected the water tank to the flow pump,and the flow rate was controlled by the pump head and the cross-sectional area of the hose.The flow rate can be adjusted within the range of 0.45~7.00 m/s.Pressure loading was conducted using a microcompu

关 键 词：动水 蠕变 声发射 监测装置 煤岩 

分 类 号：TD163[矿业工程—矿山地质测量]