褚怀保, 任志强, 闫松,等.高压气体冲击作用下煤体内部应力波传播和衰减规律试验研究[J].河南理工大学学报（自然科学版）,2022,41(4):1-6.

CHU H B, REN Z Q, YAN S, et al.Experimental study on the propagation and attenuation laws of stress waves in coal under high-pressure gas impact[J].Journal of Henan Polytechnic University(Natural Science) ,2022,41(4):1-6.

高压气体冲击作用下煤体内部应力波传播和衰减规律试验研究

褚怀保1, 任志强1, 闫松2, 朱思源1, 陈真1, 叶红宇1, 严少洋1

1.河南理工大学 土木工程学院，河南 焦作454000;2.河南理工大学 基建处，河南 焦作 454000

摘要:为进一步探究高压气体冲击致裂煤体机理，采用自主研发的高压气体冲击致裂试验系统开展煤体冲击试验，通过测试煤体内部应变，分析其应力波传播和衰减规律。结果表明：高压气体冲击作用下煤体内部产生的应变波由压缩相和拉伸相组成，其应变波作用时间较爆炸应力波作用时间长；能量相等条件下，转换成标准大气压后，高压气体体积较TNT爆生气体体积大，高压气体冲击以准静态作用过程为主，孔壁基本不出现粉碎区，高压气体冲击能量利用率高；试验条件下煤体内部应力波衰减系数约为1.592。研究结果可为高压气体冲击致裂技术应用提供指导。

关键词:高压气体冲击致裂试验系统;模拟煤体;能量分析;应力波;传播规律;衰减规律

doi:10.16186/j.cnki.1673-9787.2020100040

基金项目:国家自然科学基金资助项目（51874123）

收稿日期:2020/10/20

修回日期:2021/01/11

出版日期:2022/07/15

Experimental study on the propagation and attenuation laws of stress waves in coal under high-pressure gas impact

CHU Huaibao1, REN Zhiqiang1, YAN Song2, ZHU Siyuan1, CHEN Zhen1, YE Hongyu1, YAN Shaoyang1

1.College of Civil Engineering， Henan Polytechnic University， Jiaozuo 454000 ， Henan， China;2.Capital Construction Department， Henan Polytechnic University， Jiaozuo  454000 ， Henan， China

Abstract: In order to further explore the cracking mechanism of coal under high-pressure gas impact ,the self-developed high-pressure gas impact cracking test system was used to carry out the impact test of coal to test the internal strain of coal, and to analyze the propagation and attenuation laws of internal stress wave of coal. The test results showed that the strain wave generated in coal under the influence of high-pressure gas included two parts ,the compression phase and the expansion phase, but the operating time was longer than the explosion stress wavelength. Under the condition of equal energy , after converting to standard atmospheric pressure , the volume of high-pressure gas was larger than that of TNT blast gas. The impact of the high-pressure gas is mainly quasistatic action process,and there was basically no crushing area in the hole wall,and the energy utilization rate of the impact of the high-pressure gas was high. Under the test conditions ，the attenuation coefficient of stress wave in the coal was about 1.592. The research results provided the test data basis for the application of high-pressure gas impact cracking technology.

Key words:high-pressure gas impact cracking test system;simulation coal;energy analysis;stress wave;propagation law;attenuation law

高压气体冲击作用下煤体内部...力波传播和衰减规律试验研究_褚怀保.pdf