煤体高压气体爆破致裂规律的实验研究  

Experimental Study on Cracking Laws of High Pressure Gas Explosion in Coal

作　　者：曾范永[1,2] ZENG Fanyong(School of A rchitectural Construction,Jiangsu Vocational Institute of Architectural Technology,Xuzhou 221116,China;State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221008,China)

机构地区：[1]江苏建筑职业技术学院建筑与建造学院,江苏徐州221116 [2]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008

出　　处：《煤矿安全》2019年第1期13-16,共4页Safety in Coal Mines

基　　金：国家重点基础研究发展计划(973计划)资助项目(2014CB046905)

摘　　要：为了明确高压气体爆破对煤体渗透性影响的规律,从室内实际煤体高压气体爆破实验入手,研发了煤体高压气体爆破的实验装置,并进行相关实验。通过实验得到:煤体硬度系数在0.5～1.5时,煤体渗透率增加的更加明显;爆破孔的深度在煤体约1/3处时,高压气体爆破煤体增透效果更好;随着起爆压力的增加,煤体的渗透率也随之增加,基本成线性变化;随着煤体围压增加,高压气体爆破后煤体的渗透率增加量相应的在减小,并近似呈线性变化;而孔隙压力的大小对高压气体爆破增透投效果影响不大。In order to clarify the influence laws of high pressure gas blasting on the permeability of coal body, the experimental device of high pressure gas blasting in coal body was developed and the relevant experiment was carried out. The results show that the permeability of coal is more obvious when the hardness coefficient is between 0.5 and 1.5;the depth of blasting hole is about1/3 of coal body, and the effect of high pressure gas blasting coal is better. With the increase of detonation pressure, the permeability of coal increases and basically changes linearly;as the confining pressure of coal increases, the increase of permeability of coal after high pressure gas blasting decreases correspondingly and presents a linear change;however, the pore pressure has little effect on the permeability improvement of high pressure gas blasting.

关 键 词：煤体渗透性 实际煤体 高压气体爆破 围压 孔隙压力 瓦斯抽采 

分 类 号：TD712[矿业工程—矿井通风与安全]