瓦斯对突出煤力学特性影响试验研究  

Experimental Study of Effect of Gas on Mechanical Properties of Outburst Coal

作　　者：王家臣[1] 邵太升[1] 赵洪宝[1] 

机构地区：[1]中国矿业大学资源与安全工程学院,煤炭资源与安全开采国家重点实验室,北京100083

出　　处：《采矿与安全工程学报》2011年第3期391-394,400,共5页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金重点项目(50834005);国家自然科学基金项目(51004110);煤炭资源与安全开采国家重点实验室开放课题(SKLCRSM09KFB09);中国矿业大学(北京)基本科研业务费专项基金项目(2009QZ03)

摘　　要：以具有突出倾向的原煤粉制备的型煤试件为研究对象,对其含瓦斯后煤样加、卸载过程中的力学性质和瓦斯对煤样力学性质的影响进行了试验研究.结果表明:含瓦斯煤加、卸载过程中产生的残余变形量较大,加载过程变形模量明显要小于卸载过程,加卸载曲线形状具有较强的关联性,不同含瓦斯煤样的卸载阶段变形模量变化较大;瓦斯对煤样力学性质的影响主要表现在三轴强度和变形模量、峰值应变方面;瓦斯对煤样三轴强度的影响可用指数函数表示,而对弹性模量的影响可用二次函数表示;瓦斯对煤样力学性质的影响随着围压的增加而减小.Taking the briquette made by outburst raw coal as the sample,we tested the mechanical properties of gas-containing coal in the process of loading and unloading and studied the effect of gas on mechanical properties of gas containing coal.The results show that the residual deformation produced in loading and unloading process of outburst is very great and the deformation modulus in the loading process is smaller than that in the unloading process.The shape of curve formed in the loading process and unloading process has a great relevance.The change of deformation modulus formed in the unloading process is quite big among different coal samples.The effect of gas on the triaxial strength can be expressed by an exponential function,while that on elastic modulus can be expressed by a quadratic function.Finally,the effect of gas on the mechanical properties of coal sample decreases with the increase of confining pressure.

关 键 词：含瓦斯突出煤 加卸载 变形模量 力学性质 

分 类 号：TD713[矿业工程—矿井通风与安全]