煤矿安全2017，Vol.48Issue(8)：13-15,19,4.DOI:10.13347/j.cnki.mkaq.2017.08.004
高压氮气致裂增透实验系统的研发及应用
Development and Application of Testing System of High Pressure Nitrogen Blasting Experiment for Increasing Permeability
摘要
Abstract
The theories of air jet and quasi-static expansion of high pressure nitrogen have been laid as foundation in this paper.The testing system of high pressure nitrogen blasting experiment is independently developed to get the dynamic variation laws of high pressure nitrogen blasting in coal and rock mass.The experiments in different pressure (5 MPa,7.5 MPa,10 MPa)and different volumes (1 L,2 L,3 L) have been developed.The results showed that:with the increasing of pressure,it extends from initial longitudinal main crack to longitudinal and transverse two main cracks and the secondary cracks develop more obviously.Besides more cracks,degree of crushing is deeper and the crack propagation regions become bigger.With the expanding of device volume,the main crack becomes longer,while the secondary crack has been inhibited.According to the p-t curve analysis of the high pressure nitrogen blasting experiment,based on different characteristics in each stage,the blasting process can be divided into 3 periods,air jet impingement stage,initiation stage and fracture stage.关键词
高压氮气/致裂增透/渗透率/实验系统/瓦斯抽采Key words
high pressure nitrogen/fracturing for increasing permeability/permeability/experimental system/gas extraction分类
矿业与冶金引用本文复制引用
高杰,王海锋,仇海生..高压氮气致裂增透实验系统的研发及应用[J].煤矿安全,2017,48(8):13-15,19,4.基金项目
国家自然科学基金资助项目(51474212) （51474212）
江苏高校优势学科建设工程二期资助项目(苏政办发[2014]37号) （苏政办发[2014]37号）
